Templates in Django - Python, How to use master page in Django using Templates, How to fix TemplateDoesNotExist at error in Django. How to run Django applications in Windows. How a Django view works.
The Django Book chapter 4 templates (supplement)Vincent Chien
ย
The document discusses Django's template inheritance system. It introduces a base template that defines common elements like the page header and footer. This base template uses block tags to denote sections that child templates can override. Two child templates are shown that extend the base template and override its title and content blocks to customize each page while maintaining a common layout. Template inheritance allows avoiding redundancy and making site-wide changes by modifying only the base template.
An overview of the Django rapid application development framework. Topics include the history of the framework, an architectural overview, how to get started, and a brief comparison to Ruby on Rails.
Django apps and ORM Beyond the basics [Meetup hosted by Prodeers.com]Udit Gangwani
ย
Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. Built by experienced developers, it takes care of much of the hassle of Web development, so you can focus on writing your app without needing to reinvent the wheel. Itโs free and open source.
Following is the agenda of the meetup:
1. How to get started with Django
2. Advanced overview of Django components
1. Views
2. Models
3. Templates
4. Middlewares
5. Routing
3. Deep dive into Django ORM
4. How to write complex Django queries using Model Managers, Query Sets and Q library
5. How do Django models work internally
Whether you're a newer Django developer wanting to improve your understanding of some key concepts, or a seasoned Djangonaut, there should be something for you.
A Web Framework that shortens the Time it takes to develop software in at least an Order of Magnitude. while also tremendously minimizing Effort Pain, Time waste, Complexity, Cost of change & more
Don't RTFM, WTFM - Open Source Documentation - German Perl Workshop 2010singingfish
ย
The document discusses improving documentation for Perl modules like Moose and Catalyst by focusing on providing working code examples and minimizing extraneous information. It advocates for an incremental, "git-based" approach to introducing concepts one by one and advertising examples. Key points made include assuming readers have minimal knowledge, reducing cognitive load, and crowdsourcing documentation improvements through a standard Pod format. Contributors are tasked with improving specific documentation areas by these principles.
This document provides an introduction to web development using the Django web framework. It outlines the topics to be covered, which include setting up Django, the basic project and app structure, handling data with models and the admin interface, and front-end development with views and templates. Generic views and view functions are described as ways to handle requests and return responses in Django. Templates are explained as files that generate dynamic HTML using variables, filters and tags.
Data Migrations in the App Engine DatastoreRyan Morlok
ย
Data migration is a core problem when dealing with web frameworks. Rails and Django have their own built-in migration tools to help you manage data, but with Google Cloud Datastore, things are bit more manual. This presentation walks through several techniques and Python examples that leverage deferred tasks or map reduce to keep the data for your app consistent with the state of your code.
The Django Book chapter 4 templates (supplement)Vincent Chien
ย
The document discusses Django's template inheritance system. It introduces a base template that defines common elements like the page header and footer. This base template uses block tags to denote sections that child templates can override. Two child templates are shown that extend the base template and override its title and content blocks to customize each page while maintaining a common layout. Template inheritance allows avoiding redundancy and making site-wide changes by modifying only the base template.
An overview of the Django rapid application development framework. Topics include the history of the framework, an architectural overview, how to get started, and a brief comparison to Ruby on Rails.
Django apps and ORM Beyond the basics [Meetup hosted by Prodeers.com]Udit Gangwani
ย
Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. Built by experienced developers, it takes care of much of the hassle of Web development, so you can focus on writing your app without needing to reinvent the wheel. Itโs free and open source.
Following is the agenda of the meetup:
1. How to get started with Django
2. Advanced overview of Django components
1. Views
2. Models
3. Templates
4. Middlewares
5. Routing
3. Deep dive into Django ORM
4. How to write complex Django queries using Model Managers, Query Sets and Q library
5. How do Django models work internally
Whether you're a newer Django developer wanting to improve your understanding of some key concepts, or a seasoned Djangonaut, there should be something for you.
A Web Framework that shortens the Time it takes to develop software in at least an Order of Magnitude. while also tremendously minimizing Effort Pain, Time waste, Complexity, Cost of change & more
Don't RTFM, WTFM - Open Source Documentation - German Perl Workshop 2010singingfish
ย
The document discusses improving documentation for Perl modules like Moose and Catalyst by focusing on providing working code examples and minimizing extraneous information. It advocates for an incremental, "git-based" approach to introducing concepts one by one and advertising examples. Key points made include assuming readers have minimal knowledge, reducing cognitive load, and crowdsourcing documentation improvements through a standard Pod format. Contributors are tasked with improving specific documentation areas by these principles.
This document provides an introduction to web development using the Django web framework. It outlines the topics to be covered, which include setting up Django, the basic project and app structure, handling data with models and the admin interface, and front-end development with views and templates. Generic views and view functions are described as ways to handle requests and return responses in Django. Templates are explained as files that generate dynamic HTML using variables, filters and tags.
Data Migrations in the App Engine DatastoreRyan Morlok
ย
Data migration is a core problem when dealing with web frameworks. Rails and Django have their own built-in migration tools to help you manage data, but with Google Cloud Datastore, things are bit more manual. This presentation walks through several techniques and Python examples that leverage deferred tasks or map reduce to keep the data for your app consistent with the state of your code.
The document discusses lessons learned from using Spring Batch to process pension recalculations in parallel. It describes how the initial implementation used Hibernate in the item reader, which caused problems with concurrent sessions. The solution was to remove Hibernate from the reader and instead use JDBC to fetch primary keys and let the processor fetch related data using Hibernate. This improved performance significantly by allowing more parallelization and avoiding issues with concurrent sessions. The key lessons are to avoid Hibernate in the reader, test parallelization early, and monitor SQL performance.
This talk describes how to build RESTful JSON services using Python on Google App engine. It looks at how this can be done with straight webapp2, Google Cloud Endpoints, and a library I wrote called Pytracts.
Drupal8 modernization (new object-oriented base) and adoption of many Symfony components is a huge step in connecting these two amazing communities and amazing projects. Drupal8 is not powered by full-stack Symfony and there is still many differences between these two relatives, but still, Symfony developers should master it easily.
This talk is for Symfony developers who don't have experience with Drupal8. It will guide you through routing, controllers, hooks, events, Drupal Console, DI and many other interesting elements that power Drupal8 under the hood. It will also show how to build custom modules Symfony way.
This document provides instructions for installing CakePHP on Linux from the command line and with NetBeans IDE, on Windows using XAMPP and with NetBeans IDE, and on Windows with the IIS server. It discusses requirements like PHP and database versions, setting up the LAMP or WAMP stack where needed, downloading and configuring CakePHP, altering files and virtual hosts, and addresses some common issues that can occur during installation.
PloneNG: What's new in Plone 4.2, 4.3, and beyondDavid Glick
ย
Plone 4.2, 4.3, and beyond included new features such as improved search results, a theme editor, support for Dexterity, and infrastructure changes like officially supporting Python 2.7. Future versions may include new add-ons and improvements to standardize Plone development practices. The community is encouraged to get involved by reviewing PLIPs, championing new features, and providing feedback to help guide Plone's evolution.
This document summarizes the steps to create a basic CRUD (create, read, update, delete) application in Django:
1. Set up a Django project with manage.py and configure the database in settings.py.
2. Create a Django app using manage.py startapp and define a model in the app's models.py.
3. Add the app to INSTALLED_APPS and sync the database.
4. Build out views to handle CRUD functions like listing, adding, editing, and deleting data and link them to URLs.
5. Create templates to display data and forms for user interaction.
This isn't a talk about microservices, NO-SQL, Container solutions or hip new frameworks. This talk will show some of the standard Java APIs that are part of Java since version 5, 6, 7 or 8. All this features are very helpful to create maintainable and future-proof applications, regardless of whether JavaEE, Spring, JavaFX or any other framework is used. The talk will give an overview of some important standard concepts and APIs of Java like annotations, SPI or how to handle null values. Based on an overview of this topics and some samples the talk will answer questions like:
- How can I create my own annotations?
- How can I create a plugin structure without using frameworks like OSGI?
- What's the best way to handle NullPointerExceptions?
A Spring Batch bootcamp! Spring Batch is the open source batch processing framework from SpringSource, makes of the Spring framework. http://www.springsource.org/spring-batch
Get_template_part is used to load template files in WordPress themes. It loads a template part based on a slug and name, which correspond to a file with a hyphen between. For example, get_template_part('loop','index') would load the file loop-index.php. If that file does not exist, it will load the file with just the slug, like loop.php. The Twenty Ten theme uses get_template_part to include template files like headers, footers, and post loops.
The document discusses how PHP 5.3 changes the implementation of common design patterns like the Singleton pattern and Observer pattern through the use of anonymous functions. It provides code examples of implementing these patterns in PHP 4/5.0-5.2 versus PHP 5.3 using features like closures, late static binding, and __invoke(). The document also proposes building a dependency injection container in PHP 5.3 using anonymous functions to describe object creation without instantiating objects. This approach results in a simple yet fully-featured dependency injector implementation in around 40 lines of code.
Luis Majano introduces CBT, a templating engine for ColdBox applications based on Twig. CBT allows separating presentation logic from application code through reusable templates. Templates have access to data through a rendering context and support common constructs like variables, tags, filters, inheritance and more. CBT aims to empower non-developers to edit templates while restricting programming capabilities and automatically preventing XSS attacks.
This document discusses object oriented PHP concepts including classes, inheritance, overriding functions, error handling, and file uploads. It provides examples of creating a class with methods, instantiating objects, extending classes, overriding parent methods, and defining custom error handling functions. It also demonstrates how to upload files in PHP by handling the file on the server, checking for errors, and moving the file to a target directory.
jQuery provides several methods for making AJAX requests, including $.ajax(), $.get(), $.post(), and $.load(). The $.ajax() method allows the most flexibility by accepting an options object with parameters like url, success callback, data, and more. Shortcut methods like $.get() and $.load() are also available for common cases. jQuery handles cross-browser compatibility for making AJAX requests and normalizes callback functions.
Day 1 of 7-days "JavaScript and Rich User Interfaces" training for my colleagues. It covers XMLHttpRequest, iframe, img cookie transport, script transport, JSONP, comet.
Adding a modern twist to legacy web applicationsJeff Durta
ย
Avoid misery of working with legacy code
We will see how you can add independent and isolated components to existing pages; pages that may be difficult to change
React and Flux allow you to make self-contained additions that handle their own data access/persistence
The document discusses different strategies for testing persistence in PHP applications, including unit testing with mocks and dependencies, integration testing using DbUnit to insert test data and assert expected results, and techniques for setting up common initial states across tests. It also covers the benefits and downsides of different types of tests, such as layer crossing tests that test interactions across layers but may be more brittle, versus end-to-end black box tests that test through the public API but are harder to debug.
Implement react pagination with react hooks and react paginateKaty Slemon
ย
ReactJS Pagination using React Hooks. Learn about how to implement pagination with React hooks and React paginate to manage and display the vast data conveniently.
This is the slides I used when I shared my humble insight on Django to the students in University of Taipei in 2016. Please feel free to correct me if there is anything wrong.
Web development with django - Basics PresentationShrinath Shenoy
ย
Django is a Python web framework that follows an MVT architecture. It uses ORM to interact with databases and includes templates to separate presentation from logic. Popular sites like Instagram and Mozilla use Django. A Django project is created using the startproject command and contains apps, URLs, views, models, forms, and templates. Django encourages DRY principles and reusability through its built-in features, plugins, and customizable components.
The document discusses lessons learned from using Spring Batch to process pension recalculations in parallel. It describes how the initial implementation used Hibernate in the item reader, which caused problems with concurrent sessions. The solution was to remove Hibernate from the reader and instead use JDBC to fetch primary keys and let the processor fetch related data using Hibernate. This improved performance significantly by allowing more parallelization and avoiding issues with concurrent sessions. The key lessons are to avoid Hibernate in the reader, test parallelization early, and monitor SQL performance.
This talk describes how to build RESTful JSON services using Python on Google App engine. It looks at how this can be done with straight webapp2, Google Cloud Endpoints, and a library I wrote called Pytracts.
Drupal8 modernization (new object-oriented base) and adoption of many Symfony components is a huge step in connecting these two amazing communities and amazing projects. Drupal8 is not powered by full-stack Symfony and there is still many differences between these two relatives, but still, Symfony developers should master it easily.
This talk is for Symfony developers who don't have experience with Drupal8. It will guide you through routing, controllers, hooks, events, Drupal Console, DI and many other interesting elements that power Drupal8 under the hood. It will also show how to build custom modules Symfony way.
This document provides instructions for installing CakePHP on Linux from the command line and with NetBeans IDE, on Windows using XAMPP and with NetBeans IDE, and on Windows with the IIS server. It discusses requirements like PHP and database versions, setting up the LAMP or WAMP stack where needed, downloading and configuring CakePHP, altering files and virtual hosts, and addresses some common issues that can occur during installation.
PloneNG: What's new in Plone 4.2, 4.3, and beyondDavid Glick
ย
Plone 4.2, 4.3, and beyond included new features such as improved search results, a theme editor, support for Dexterity, and infrastructure changes like officially supporting Python 2.7. Future versions may include new add-ons and improvements to standardize Plone development practices. The community is encouraged to get involved by reviewing PLIPs, championing new features, and providing feedback to help guide Plone's evolution.
This document summarizes the steps to create a basic CRUD (create, read, update, delete) application in Django:
1. Set up a Django project with manage.py and configure the database in settings.py.
2. Create a Django app using manage.py startapp and define a model in the app's models.py.
3. Add the app to INSTALLED_APPS and sync the database.
4. Build out views to handle CRUD functions like listing, adding, editing, and deleting data and link them to URLs.
5. Create templates to display data and forms for user interaction.
This isn't a talk about microservices, NO-SQL, Container solutions or hip new frameworks. This talk will show some of the standard Java APIs that are part of Java since version 5, 6, 7 or 8. All this features are very helpful to create maintainable and future-proof applications, regardless of whether JavaEE, Spring, JavaFX or any other framework is used. The talk will give an overview of some important standard concepts and APIs of Java like annotations, SPI or how to handle null values. Based on an overview of this topics and some samples the talk will answer questions like:
- How can I create my own annotations?
- How can I create a plugin structure without using frameworks like OSGI?
- What's the best way to handle NullPointerExceptions?
A Spring Batch bootcamp! Spring Batch is the open source batch processing framework from SpringSource, makes of the Spring framework. http://www.springsource.org/spring-batch
Get_template_part is used to load template files in WordPress themes. It loads a template part based on a slug and name, which correspond to a file with a hyphen between. For example, get_template_part('loop','index') would load the file loop-index.php. If that file does not exist, it will load the file with just the slug, like loop.php. The Twenty Ten theme uses get_template_part to include template files like headers, footers, and post loops.
The document discusses how PHP 5.3 changes the implementation of common design patterns like the Singleton pattern and Observer pattern through the use of anonymous functions. It provides code examples of implementing these patterns in PHP 4/5.0-5.2 versus PHP 5.3 using features like closures, late static binding, and __invoke(). The document also proposes building a dependency injection container in PHP 5.3 using anonymous functions to describe object creation without instantiating objects. This approach results in a simple yet fully-featured dependency injector implementation in around 40 lines of code.
Luis Majano introduces CBT, a templating engine for ColdBox applications based on Twig. CBT allows separating presentation logic from application code through reusable templates. Templates have access to data through a rendering context and support common constructs like variables, tags, filters, inheritance and more. CBT aims to empower non-developers to edit templates while restricting programming capabilities and automatically preventing XSS attacks.
This document discusses object oriented PHP concepts including classes, inheritance, overriding functions, error handling, and file uploads. It provides examples of creating a class with methods, instantiating objects, extending classes, overriding parent methods, and defining custom error handling functions. It also demonstrates how to upload files in PHP by handling the file on the server, checking for errors, and moving the file to a target directory.
jQuery provides several methods for making AJAX requests, including $.ajax(), $.get(), $.post(), and $.load(). The $.ajax() method allows the most flexibility by accepting an options object with parameters like url, success callback, data, and more. Shortcut methods like $.get() and $.load() are also available for common cases. jQuery handles cross-browser compatibility for making AJAX requests and normalizes callback functions.
Day 1 of 7-days "JavaScript and Rich User Interfaces" training for my colleagues. It covers XMLHttpRequest, iframe, img cookie transport, script transport, JSONP, comet.
Adding a modern twist to legacy web applicationsJeff Durta
ย
Avoid misery of working with legacy code
We will see how you can add independent and isolated components to existing pages; pages that may be difficult to change
React and Flux allow you to make self-contained additions that handle their own data access/persistence
The document discusses different strategies for testing persistence in PHP applications, including unit testing with mocks and dependencies, integration testing using DbUnit to insert test data and assert expected results, and techniques for setting up common initial states across tests. It also covers the benefits and downsides of different types of tests, such as layer crossing tests that test interactions across layers but may be more brittle, versus end-to-end black box tests that test through the public API but are harder to debug.
Implement react pagination with react hooks and react paginateKaty Slemon
ย
ReactJS Pagination using React Hooks. Learn about how to implement pagination with React hooks and React paginate to manage and display the vast data conveniently.
This is the slides I used when I shared my humble insight on Django to the students in University of Taipei in 2016. Please feel free to correct me if there is anything wrong.
Web development with django - Basics PresentationShrinath Shenoy
ย
Django is a Python web framework that follows an MVT architecture. It uses ORM to interact with databases and includes templates to separate presentation from logic. Popular sites like Instagram and Mozilla use Django. A Django project is created using the startproject command and contains apps, URLs, views, models, forms, and templates. Django encourages DRY principles and reusability through its built-in features, plugins, and customizable components.
Django is a Python web framework that encourages rapid development and clean design. It includes an ORM, URL routing, templates, internationalization support, caching, authentication, and an admin interface. Django uses the MVT architecture, with Models handling data, Views returning responses, and Templates rendering output. Requests go through the URL dispatcher to Views, which can retrieve Model data and pass it to Templates to generate responses. The framework provides tools to define Models, URLs, Views and Templates to build applications.
This document introduces Django, an open-source Python web framework. It describes Django's key features like rapid development, reusable apps, an admin interface, and templates. It explains Django's model-view-template architecture, including models for defining data, views for business logic, URLs for routing, and templates for presentation. It provides examples of defining a blog application in Django with models, views, URLs, and templates.
The Django Book / Chapter 3: Views and URLconfsVincent Chien
ย
This document summarizes key points from Chapter 3 of the Django Book about views and URLconfs in Django. It discusses that views are Python functions that take a request object and return an HttpResponse, and URLconfs are used to map URLs to their corresponding views. It provides an example of a basic "Hello World" view and URLconf configuration. It also explains how Django processes requests by matching the URL to patterns in the URLconf and calling the associated view function.
GDG Addis - An Introduction to Django and App EngineYared Ayalew
ย
This document provides an overview of developing and deploying Django applications to Google App Engine. It begins with an introduction to Django and how to set up a Django development environment using virtualenv and pip. It then covers common Django components like models, views, templates, URLs and forms. It concludes with a brief discussion of deploying Django applications to App Engine. The key topics covered include setting up a virtual environment for Django development, the model-view-template architecture of Django, and using Django tools and components to build an application that can be deployed to App Engine.
1. The document provides an overview of Django, an open-source web framework. It discusses Django's MVT architecture, installing Django, creating projects and apps, models, views, templates, and customizing the admin interface.
2. Key aspects covered include using models to define the database structure, views to contain logic and handle requests/responses, templates to separate design from code, and the admin interface to manage data.
3. The document demonstrates how to configure URLs and associate them with views, build templates that use variables and logic, and customize the admin panel through model registration and custom classes.
The document provides instructions for building and deploying a Django project called "pages" that has a homepage and about page. It describes setting up the initial project structure, using templates to render the pages, implementing class-based views, configuring URLs, extending templates for code reuse, and adding basic tests to check that the pages load successfully.
This document provides a table of contents and overview for a slide deck containing lecture videos on URL routing, views, templates, and the Django template language in Week 2 of a course. It lists 7 sections that are hyperlinked shortcuts to specific pages within the slide deck covering topics like URL routing in Django, Django views, using templates in Django, the Django template language, and reversing URLs and views.
This document provides instructions for setting up a Django development environment and creating a basic Django project with an app. It covers installing Python and Pipenv, creating a virtual environment, installing Django, generating a project scaffold, creating an app, configuring URLs and templates, making migrations and running the development server. It also discusses Django templates, forms, models, views and generic views at a high level.
Django is a Python-based web framework that follows the MTV (Model-Template-View) design pattern. It allows developers to create dynamic websites and web applications by handling common tasks like database access, session management, and rendering templates. The document outlines how to create a Django project and app, configure settings like the database, and link views to URLs to handle requests and return responses.
This document provides an overview of the Django web framework. It begins with definitions of Django and its model-view-template architecture. It then discusses Django's design philosophies of being loosely coupled, encouraging less coding through the DRY principle, and enabling fast development. The document outlines how to set up a Django environment, create a project and apps, develop views, integrate templates, and link everything together through URLs. In summary, it serves as a seminar covering the basic concepts and processes for building websites using the Django web framework in Python.
The document provides an introduction to Django, including how to install it, set up a project and app, work with models and migrations, write views and templates, and use the admin interface. Key aspects covered include Django being a Python-based web framework using the MTV design pattern, installing Django in a virtual environment, creating models to represent database tables and relationships, and rendering data to templates from views.
This document provides an overview and introduction to the Django web framework. It discusses that Django is a free and open-source Python framework that encourages rapid development and clean design. It follows the MVC pattern and includes an ORM, automatic admin interface, templating system, and more. The document then discusses starting a Django project, creating apps, defining URLs and views, using templates, and includes an appendix on additional topics like models and sending mail.
The document discusses web programming using Python (Django). It introduces the model-view-controller (MVC) pattern for web development and explains why Python and Django are suitable for building web applications. It provides steps to install Django and build a social bookmarking application, including creating models, views, URLs and templates. The application allows users to store, share and view bookmarks.
This tutorial provides an overview of creating a sample Django application that demonstrates basic components including models, views, templates, URLs, forms, and the admin site. Key steps covered include:
- Setting up a Django project in Eclipse with Python, Django, SQLite
- Creating models, views, URLs, and templates
- Using the Django admin site to populate the database
- Displaying model data in templates
- Creating and processing a basic form
Django is a Python web framework that encourages rapid development and clean, pragmatic design. It uses the MTV (Model Template View) pattern rather than MVC. Django features an ORM, form handling, template system and admin interface. To set up a Django project, you create a project directory, install Django, add apps, set up models and URLs, and develop templates and views. Django promotes loose coupling, DRY principles and writing minimal code.
Django is a Python web framework that encourages rapid development and clean design. It originated from the name of guitarist Django Reinhardt and was first released in 2005. Django emphasizes loose coupling, explicit configuration, and development speed. It uses the MTV pattern rather than MVC, with models, templates, and views instead of models, views, and controllers. The document then provides steps to create a Django project and blog application, including generating models, linking the app to the admin interface, setting up URLs and templates.
Similar to templates in Django material : Training available at Baabtra (20)
The document provides an overview of agile methodology compared to traditional waterfall methodology. Waterfall development completes each phase sequentially before moving to the next, which can be risky and inefficient. Agile is iterative and adaptable, prioritizing working software over documentation. Scrum is an agile framework that uses short sprints, daily stand-ups, and backlogs to deliver working software frequently. Kanban also uses iterative development but visualizes workflows on boards to limit work in progress and optimize lead times.
This document provides best practices for coding. It discusses the importance of coding practices in reducing rework time and saving money. It covers four key areas: program design, naming conventions, documentation, and formatting. Program design discusses architectures like MVC and data storage. Naming conventions provide guidelines for naming classes, methods, variables and packages using conventions like camel casing. Documentation comments are important for maintaining programs and explaining code to other developers. Formatting addresses indentation, whitespace and brace formatting.
This document provides an introduction to the Java programming language. It discusses installing the JDK and Eclipse development environment. It then covers JVM, JRE, and JDK concepts. The document demonstrates a simple "Hello World" Java program. It discusses Java naming conventions and basic data types. It also outlines common loops and control structures in Java. The remainder of the document provides examples of Java programs and discusses arrays, lists, modifiers, methods, OOP concepts by relating real-world objects to objects in software, and how to define classes and create objects in Java.
This PPT will help to understand how learning happens in brain. How you can adjust your skill acquisition in the right way so that maximum output is obtained.
Baabtra.com has a solution to provide programming for kids in school. This is based on the CBSE curriculum of India. The main subjects covered are Mathematics and Physics.
99LMS is a mobile based comprehensive enterprise learning environment in which learning processes of a company can be managed and integrated. It ensures employees have the right skills by enabling course content management, providing classroom training and e-learning. Through the APIs, you can develop your resources before they join your company.
The document provides an introduction to using PHP sessions and cookies to maintain state across multiple requests. It discusses how cookies store small amounts of data on the client browser, while sessions allow storing data on the server. The document then provides steps to create a login system using sessions: 1) Check login credentials and create a session variable on successful login, 2) Display user profile details on the profile page by fetching the session variable, 3) Include a logout link that destroys the session to end the user session. Key differences between cookies and sessions are also summarized - cookies are stored on the client while sessions are stored on the server.
This document provides an introduction and instructions for connecting a PHP application to a MySQL database. It discusses storing and retrieving data from the database. The key steps covered are:
1. Connecting to the MySQL server from PHP using mysql_connect().
2. Selecting the database to use with mysql_select_db().
3. Executing SQL queries to store/retrieve data with mysql_query().
4. Different mysql_fetch_* functions that can be used to retrieve rows of data from a database query.
An example task is provided where a registration form allows storing user data to a database table, and then retrieving and displaying the stored data in a table.
The document discusses database normalization and the three forms of normalization. It provides examples of tables that violate each normal form and explains how to modify the tables to conform to the normal forms. The first normal form requires each field to contain a single value and related data to be stored in separate tables or fields. The second normal form eliminates redundant data by creating separate tables for values that apply to multiple records. The third normal form ensures non-key fields are fully dependent on the primary key and removes transitive dependencies.
This document discusses transactions in SQL Server. It introduces transactions and their relevance in ensuring data integrity when multiple tables need to be updated together. Transactions group a set of database operations so that if any operation fails, all operations are rolled back. The document demonstrates creating a transaction using START TRANSACTION, COMMIT TRANSACTION, and ROLLBACK TRANSACTION statements. It also shows handling transactions within try/catch blocks so that failures cause a rollback. Transactions ensure atomicity and integrity by committing all operations together as a single unit, or rolling them all back if any fail.
The document discusses user defined functions (UDF), views, and indexing in SQL Server. It provides an example of a UDF that returns a teacher's name based on their ID. Key differences between stored procedures and UDFs are that UDFs are compiled at runtime, can't perform DML operations, and must return a value. Views are described as customized representations of data from tables that don't take up storage space themselves. Indexing improves the speed of operations by organizing data to allow faster searches.
This document discusses stored procedures in SQL Server. It begins by explaining that stored procedures allow encapsulation of repetitive tasks and are stored in the database data dictionary. It then shows how stored procedures reduce network traffic and client-server communication compared to individual SQL statements. The document provides examples of how to create a stored procedure using CREATE PROCEDURE and how to call it using EXEC. It notes advantages like precompiled execution, reduced traffic, code reuse, and security control. It also demonstrates using parameters, loops, conditions and variables inside stored procedures.
This document provides an introduction to SQL server functions, grouping, and joins. It discusses aggregate functions that return single values from columns like average, sum, min, and count. It also discusses scalar functions that return a single value for each row like upper, lower, and round. The document explains how to use the GROUP BY clause to group result sets and then run aggregate functions on the groups. It also covers the HAVING clause, which filters grouped data. Finally, it describes different types of joins like inner joins, left outer joins, and right outer joins.
This document provides an introduction to database management systems (DBMS) and SQL Server. It discusses what a database is and where databases are used. It then explains what a DBMS is and some examples of DBMS software. The document goes on to describe the relational database model including entities, attributes, relationships and keys. It also discusses the entity-relationship model. Finally, it covers SQL statements including DDL, DML, and DCL and provides examples of commands for creating tables, inserting and updating data, and setting privileges.
This document provides an introduction to database management systems (DBMS) and SQL Server. It discusses what a database is and where databases are used. It then describes DBMS as software that allows users to define, create, query, update and administer databases. Common DBMS examples include Oracle, MySQL, PostgreSQL and SQL Server. The document goes on to explain relational databases and the entity-relationship model. It also covers key concepts like tables, rows, columns, primary keys and foreign keys. Finally, it discusses the major SQL statements: DDL for defining database structure, DML for managing data, and DCL for controlling access privileges.
Microsoft HoloLens is the first holographic computer that does not require wires or connection to another device. It allows users to see holograms overlaid in the real world. HoloLens features see-through holographic lenses, sensors, and a processing unit that allows it to understand the environment and overlay holograms without wires in real-time. HoloLens uses augmented reality technology to supplement real-world environments with virtual elements and can enable entirely new ways of communication, creation and exploration through holograms.
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An aptitude test measures an individual's ability to apply skills and knowledge. It tests logical reasoning and thinking through multiple choice questions that are timed strictly. Different types of aptitude tests include verbal, numerical, abstract, and spatial abilities. To prepare, practice is important as well as focusing on weak areas. When taking the test, arrive on time, understand instructions, answer questions accurately and quickly while watching the time, and avoid spending too much time on any one question.
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4. Django
โข It is a web framework
โข It follow MVC architecture (MTV architecture)
โ Model View Controller
โข Model = Database
โข View = Presentation
โข Controller = Business Logic
โ Model Template View
โข Model = Database
โข Template = Presentation
โข View = Business Logic
5. โข In the case of Django View contains the business logic.
It is different from normal MVC nomenclature.
โข For a normal HTML web page to output, there must be
four files.
โ Models.py = It contains the database objects. It helps you
to write python codes rather than SQL statements
โ View.py = It contains the logic
โ Ulrs.py = It contains the configuration /urls in the website
โ Html (template) = The presentation or what the user sees
6. โข a view is just a Python function that takes
an HttpRequest as its first parameter and
returns an instance of HttpResponse. In order
for a Python function to be a Django view, it
must do these two things. (There are
exceptions, but weโll get to those later.)
7. โข For creating a new project in Django
โ django-admin.py startproject mysite
8. โข Create a view.py (It is for easy to understand
and naming convention. You can give any
name to the py files)
9. Stupid error that you can make!
โข Always tick file extension when you are
programming in Windows . I created a file
name views.py and in fact it was views.py.py. I
kept getting the error
โ โImportError at /hello/
โ No module named views
10. โข Even though the error is caused while using
Django (Python framework), it has nothing to
do with Django. You must try importing the
views.py directly in the python command line.
11. โข If you get the above error come and check
whether .pyc file is created for the view. If not
there is something wrong with the file and
how it was defined.
12. โWelcome to baabtra programโ
โข Here we are going to teach you how to print
โWelcome to baabtra โ Now the time is
*System Time+โ using Django framework
(Python)
โข There will be 2 files required for this program
โข views.py: This file can be present in Main
folder of the project or in an app.
14. views.py
โข import datetime
โข from django.http import HttpResponse
โข def hellobaabtra(request):
#This is created for a simple Hello message
return HttpResponse("Hello Baabtra")
โข def welcomecurrent_datetime(request):
now = datetime.datetime.now()
html = "<html><body>Welcome to baabttra: It is
now %s.</body></html>" % now
return HttpResponse(html)
19. How the code works?
โข Django starts with Settings.py file.
โข When you run python manage.py runserver, the
script looks for a file called settings.py in the
inner baabtrastudentwebsite directory. This file
contains all sorts of configuration for this
particular Django project, all in uppercase:
TEMPLATE_DIRS, DATABASES, etc. The most
important setting is called ROOT_URLCONF.
ROOT_URLCONF tells Django which Python
module should be used as the URLconf for this
Web site.
21. โข The autogenerated settings.py contains
a ROOT_URLCONF setting that points to the
autogenerated urls.py. Below is a screenshot
from settings.py
โข This corresponds the file
/baabtrastudentwebsite/url
22. โข When a request comes in for a particular URL โ
say, a request for /hello/ โ Django loads the
URLconf pointed to by
the ROOT_URLCONF setting. Then it checks each
of the URLpatterns in that URLconf, in
order, comparing the requested URL with the
patterns one at a time, until it finds one that
matches. When it finds one that matches, it calls
the view function associated with that
pattern, passing it an HttpRequest object as the
first parameter.
23. โข In summary:
โ A request comes in to /hello/.
โ Django determines the root URLconf by looking at
the ROOT_URLCONF setting.
โ Django looks at all of the URLpatterns in the URLconf
for the first one that matches /hello/.
โ If it finds a match, it calls the associated view function.
โ The view function returns an HttpResponse.
โ Django converts the HttpResponse to the proper HTTP
response, which results in a Web page.
24. Templates
โข Why templates?
โ For separating the python code and HTML
โข Advantages
โ Any design change will not affect the python code
โ Separation of duties
25. Example for a template
<html>
<head><title>Ordering notice</title></head>
<body>
<h1>Baabtra Notification</h1>
<p>Dear {{ candidate_name }},</p>
<p>Congragulations! You have been selected by {{ company }}.</p>
<p>Your subjects are</p>
<ul>
{% for subject in subjectlist %}
<li>{{ subject }}</li>
{% endfor %}
</ul>
{% if distinction %}
<p>Great! You have more than 80% marks.</p>
{% else %}
<p>You have cleared all the tests.</p>
{% endif %}
<p>Sincerely,<br />{{ mentor }}</p>
</body>
</html>
26. Explanation
โข Candidate_name is a variable. Any text
surrounded by a pair of braces
(e.g., {{ candidate_name }}) is a variable
โข {% if distinction %} is template tag.
27. How to use template in Django?
Type python manage.py shell
Template system rely on settings.py. Django looks for an environment variable
called DJANGO_SETTINGS_MODULE, which should be set to the import path
of your settings.py. For example, DJANGO_SETTINGS_MODULE might be set
to โbaabtrastudentwebsite.settings', assuming baabtrastudentwebsite is on
your Python path. While running python, it is better to use python manage.py
shell as it will reduce errors.
You can find the value in manage.py file of the project.
28. >>> from django import template
>>> t = template.Template('My training centre is {{
name }}.')
>>> c = template.Context({'name': โbaabtra'})
>>> print t.render(c)
My training centre is baabtra.
>>> c = template.Context(,'name': โbaabte'})
>>> print t.render(c)
'My training centre is baabte .
29. โข The second line creates a template object. If
there is an error TemplateSyntaxError is
thrown.
โข Block tag and template tag are synonymous.
30. Rendering a template
โข Values are passed to template by giving it a context. A
context is simply a set of template variable names and
their associated values. A template uses this to
populate its variables and evaluate its tags.
โข Context class is present in django.template
โข Render function returns a unicode object and not a
python string.
โข We can also pass string as a template argument to the
constructure. For ex. Str_temp โMy training centre is {{
name --.โ
โข t = template.Template(Str_temp)
31.
32. โข You can render the same template with
multiple contexts.
33. Using Templates in views
โข Django provides template-loading API
โข In the settings.py file, the template directory
name is mentioned under TEMPLATE_DIRS
tag.
39. โข Now if you want to give the relative path, you
can follow the below steps:
โ Settings.py
โ Please add
โข import os.path
โข PROJECT_PATH =
os.path.realpath(os.path.dirname(__file__))
42. โข If we are not giving the absolute path for the
template folder, you need to put the template
under the project folder or app with the same
name as that of project. Our program runs
under the folder with the same name as that
of the project.
43. Refresh the page ๏
โข Please note that in this case we have not given
the absolute path.
44. Include Template Tag
โข {% include template_name %}
โข For example, we want to include a home
template in more than one file. In our
previous example, we want to create a master
page which will be used in two pages.
45. Problem statement
โข Create a master page template which will be
included in two templates. The home template
will have
โ This is from master page
โข The first and second template will have โThis is
first templateโ and โThis is second templateโ
โข ViewName:
v_baabtrainctemplate1, v_baabtrainctemplate2
โข Url Name: url_ baabtrainctemplate1, url_
baabtrainctemplate2
51. โข Code under firstbaabtra.html
<html>
<body>
{% include "masterpage.html" %}
<br>
This is the first template. <br>
Welcome to baabtra: It is now {{ now }}.
</body></html>
52. โข HTML inside masterpage.html
There is no html tags used here.
This is from master page
54. โข The author takes corporate trainings in
Android, Java, JQuery, JavaScript and Python. In case
if your organization needs training, please connect
through www.massbaab.com/baabtra.
โข Baabtra provides both online and offline trainings for
candidates who want to learn latest programming
technologies , frameworks like
codeigniter, django, android, iphone app
development
โข Baabtra also provides basic training in
SQL, .NET, PHP, Java and Python who wants to start
their career in IT.