This document discusses relationships in Django ORM, including many-to-one and many-to-many relationships. It explains how to define relationships using ForeignKeys and ManyToManyField, and how to query, create, update, and delete related objects. Specifically, it shows how to define a Comment model with a ForeignKey to Post to create a many-to-one relationship, and a Tag model connected to Post through a ManyToManyField to represent many-to-many tags. It demonstrates traversing the relationships in both directions and performing CRUD operations on related objects.
What's in a language? How can it help us express our intent better? Based on his last talk, Cheng will explore some concrete, daily patterns in our codebase that Reason elegantly solves through a few simple yet rich concepts.
When you look at a wireframe, what do you see? ViewControllers, navigation bars, and tableviews? As developers, we are great at figuring out what to put on the screen, what to animate, and how to put those pieces together. What we don't realize, in this early stage of app development, is that knowing your APIs here is crucial. How many times have we gone to implement a feature, only to find a half-baked API, or one that makes us hardcode half the information? The wireframe stage is the point to match screens with API calls, because this is where the app is most flexible. In this session we will walk through how to match wireframes to their corresponding APIs, as well as identify and solve the problems they create.
By automating user onboarding and offboarding processes, you can streamline access control based on role, department, location, title and other attributes, reduce IT involvement, and accelerate time to productivity.
Join Chip Epps and Rob Capozzi from OneLogin for actionable insights to automating cloud application and user provisioning.
- Increase workforce productivity by removing manual user updates
- Enhance security by preventing unauthorized access to enterprise data from former employees
What's in a language? How can it help us express our intent better? Based on his last talk, Cheng will explore some concrete, daily patterns in our codebase that Reason elegantly solves through a few simple yet rich concepts.
When you look at a wireframe, what do you see? ViewControllers, navigation bars, and tableviews? As developers, we are great at figuring out what to put on the screen, what to animate, and how to put those pieces together. What we don't realize, in this early stage of app development, is that knowing your APIs here is crucial. How many times have we gone to implement a feature, only to find a half-baked API, or one that makes us hardcode half the information? The wireframe stage is the point to match screens with API calls, because this is where the app is most flexible. In this session we will walk through how to match wireframes to their corresponding APIs, as well as identify and solve the problems they create.
By automating user onboarding and offboarding processes, you can streamline access control based on role, department, location, title and other attributes, reduce IT involvement, and accelerate time to productivity.
Join Chip Epps and Rob Capozzi from OneLogin for actionable insights to automating cloud application and user provisioning.
- Increase workforce productivity by removing manual user updates
- Enhance security by preventing unauthorized access to enterprise data from former employees
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.
Object.__class__.__dict__ - python object model and friends - with examplesRobert Lujo
Python object model - advanced and some not so advanced features, lot of code examples:
building blocks, objects, classes, functions, mutable and immutable, everything is an object, variables, global context, "executing" the module, standard types inheritance, multiple inheritance, mixins and mro, dynamic classes, metaclasses, property function and descriptors context managers & with, useful __methods__
I’ve been using, teaching, and evangelizing about jQuery for years. The library's simplicity is seductive; after a while, it kind of writes itself. So why did I venture into the unknown world of Dojo for a recent project? Find out what I learned about JavaScript code organization, inheritance, dependency management, and more in a whirlwind beginner's tour of a toolkit that answers some of the big questions surrounding JavaScript development.
The Advanced Internet Marketing Training Programme Digital Marketing Course provided by DIDM comes along with a guarantee 100% job security and placement as well as lifetime job assistance is also provided.
A Related Matter: Optimizing your webapp by using django-debug-toolbar, selec...Christopher Adams
This talk explains how to perform SQL query analysis and how to rewrite your views to reduce the number of queries Django uses in evaluating your model objects and their attributes. Special emphasis will be given to the powerful methods "select_related" and "prefetch_related." I will highlight the problem with a naive use of the ORM, how to target code for optimization, and the beneficial result.
Like any abstraction layer, the Django ORM hides the messy details about its underlying implementation. This is both the benefit and the risk. If used naively, any tool can cause unexpected or problematic outcomes. Likewise, the ORM can cause your application to interact with the database in an ugly and inefficient way, creating special challenges regarding scaling a quickly-prototyped webapp.
Many design patterns and best practices have been developed as a result to nudge developers to use the ORM more efficiently. The good news is, one of the easiest and most powerful patterns has been wrapped into Django itself, in the dual pairs of methods in the Django ORM's Queryset API, "select_related" and "prefetch_related." These methods instruct the Queryset, when evaluated, to perform two kinds of useful optimizations for you that can reduce the number of queries by orders of magnitude resulting from iterating over model objects and many-to-many relations.
This talk summarizes the problem these methods of the Queryset API try to solve, how to effectively use them, and the beneficial result. Mastering how to use Queryset methods efficiently and powerfully is a major step in moving from a beginner to intermediate Django developer.
Delivered at DjangoCon 2014.
Hidden Gems of Europe - DISCOVERING THE CONTINENT'S BEST-KEPT SECRETSKamil Uğraş TÜRKOĞLU
Europe, continent rich in history, culture, and natural beauty, is often synonymous with famous cities like Paris, Rome, and London. These iconic destinations attract millions of tourists every year, captivating them with their renowned landmarks, vibrant culture, and bustling urban life. However, beyond these well-trodden paths lie countless hidden gems waiting to be discovered. These lesser-known destinations offer unique experiences, authentic encounters, and breathtaking landscapes that often surpass the allure of their famous counterparts.
In "Hidden Gems of Europe," we embark on a journey to uncover these secret spots, exploring the heart and soul of Europe through its quaint villages, charming towns, and secluded natural wonders. This book aims to inspire travelers to look beyond the obvious and venture into the lesser-explored corners of the continent, where true adventure and discovery await.
BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. Get information in this PDF and simplyfy your visa process.
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.
Object.__class__.__dict__ - python object model and friends - with examplesRobert Lujo
Python object model - advanced and some not so advanced features, lot of code examples:
building blocks, objects, classes, functions, mutable and immutable, everything is an object, variables, global context, "executing" the module, standard types inheritance, multiple inheritance, mixins and mro, dynamic classes, metaclasses, property function and descriptors context managers & with, useful __methods__
I’ve been using, teaching, and evangelizing about jQuery for years. The library's simplicity is seductive; after a while, it kind of writes itself. So why did I venture into the unknown world of Dojo for a recent project? Find out what I learned about JavaScript code organization, inheritance, dependency management, and more in a whirlwind beginner's tour of a toolkit that answers some of the big questions surrounding JavaScript development.
The Advanced Internet Marketing Training Programme Digital Marketing Course provided by DIDM comes along with a guarantee 100% job security and placement as well as lifetime job assistance is also provided.
A Related Matter: Optimizing your webapp by using django-debug-toolbar, selec...Christopher Adams
This talk explains how to perform SQL query analysis and how to rewrite your views to reduce the number of queries Django uses in evaluating your model objects and their attributes. Special emphasis will be given to the powerful methods "select_related" and "prefetch_related." I will highlight the problem with a naive use of the ORM, how to target code for optimization, and the beneficial result.
Like any abstraction layer, the Django ORM hides the messy details about its underlying implementation. This is both the benefit and the risk. If used naively, any tool can cause unexpected or problematic outcomes. Likewise, the ORM can cause your application to interact with the database in an ugly and inefficient way, creating special challenges regarding scaling a quickly-prototyped webapp.
Many design patterns and best practices have been developed as a result to nudge developers to use the ORM more efficiently. The good news is, one of the easiest and most powerful patterns has been wrapped into Django itself, in the dual pairs of methods in the Django ORM's Queryset API, "select_related" and "prefetch_related." These methods instruct the Queryset, when evaluated, to perform two kinds of useful optimizations for you that can reduce the number of queries by orders of magnitude resulting from iterating over model objects and many-to-many relations.
This talk summarizes the problem these methods of the Queryset API try to solve, how to effectively use them, and the beneficial result. Mastering how to use Queryset methods efficiently and powerfully is a major step in moving from a beginner to intermediate Django developer.
Delivered at DjangoCon 2014.
Hidden Gems of Europe - DISCOVERING THE CONTINENT'S BEST-KEPT SECRETSKamil Uğraş TÜRKOĞLU
Europe, continent rich in history, culture, and natural beauty, is often synonymous with famous cities like Paris, Rome, and London. These iconic destinations attract millions of tourists every year, captivating them with their renowned landmarks, vibrant culture, and bustling urban life. However, beyond these well-trodden paths lie countless hidden gems waiting to be discovered. These lesser-known destinations offer unique experiences, authentic encounters, and breathtaking landscapes that often surpass the allure of their famous counterparts.
In "Hidden Gems of Europe," we embark on a journey to uncover these secret spots, exploring the heart and soul of Europe through its quaint villages, charming towns, and secluded natural wonders. This book aims to inspire travelers to look beyond the obvious and venture into the lesser-explored corners of the continent, where true adventure and discovery await.
BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. BTW UK Visa Application Process, Uk Visa complete guide, Uk Visa fees, requirements and application process. Know all about uk visa and best way to apply for the uk visa. Get to know about the requirements that allows you for the faster visa appliaction. Get information in this PDF and simplyfy your visa process.
How To Talk To a Live Person at American Airlinesflyn goo
This page by FlynGoo can become your ultimate guide to connecting with a live person at American Airlines. Have you ever felt lost in the automated maze of customer service menus? FlynGoo is here to rescue you from endless phone trees and automated responses. With just a click or a call to a specific number, we ensure you get the human touch you deserve. No more frustration, no more waiting on hold - we simplify the process, making your travel experience smoother and more enjoyable.
Wayanad-The-Touristry-Heaven to the tour.pptxcosmo-soil
Wayanad, nestled in Kerala's Western Ghats, is a lush paradise renowned for its scenic landscapes, rich biodiversity, and cultural heritage. From trekking Chembra Peak to exploring ancient Edakkal Caves, Wayanad offers thrilling adventures and serene experiences. Its vibrant economy, driven by agriculture and tourism, highlights a harmonious blend of nature, tradition, and modernity.
The Power of a Glamping Go-To-Market Accelerator Plan.pptxRezStream
Unlock the secrets to success with our comprehensive 8-Step Glamping Accelerator Go-To-Market Plan! Watch our FREE webinar, where you'll receive expert guidance and invaluable insights on every aspect of launching and growing your glamping business.
Assessing the Influence of Transportation on the Tourism Industry in Nigeriagsochially
This research dissertation investigates the complex interplay between transportation and the tourism industry in Nigeria, aiming to unravel critical insights that contribute to the enhancement of the overall tourist experience. The study employs a multi-faceted approach, literature review establishes a robust theoretical framework, incorporating The Service Quality and Satisfaction Theory to guide the research questions and hypotheses.
The methodology involves the distribution of a structured questionnaire, ensuring a representative sample and facilitating a comprehensive analysis of the gathered data.
Key findings include the nuanced perceptions of transportation infrastructure adequacy, safety and security concerns, financial influences on travel decisions, and the cultural and ecological impacts of transportation choices. These findings culminate in a comprehensive set of recommendations for policymakers and practitioners in the Nigerian tourism industry. The findings contribute to the existing literature by providing actionable insights for policymakers, stakeholders, and researchers in the Nigerian tourism sector.
The recommendations encompass gender-sensitive planning, infrastructure enhancements, safety measures, and strategic interventions to address financial constraints, ensuring a holistic and sustainable development of the tourism industry in Nigeria.
Author: Imafidon Osademwingie Martins
2. Outline
• Single model ( Django girls tutorial )
• Relationship
• 1. many-to-one ( )
• 2. many-to-many (Tag)
• What does it looks like in database
• How to define relationship
• Traverse / query / create / delete relation
4. CRUD (Create, Read, Update, Delete)
Post.objects.create(title='My First Trip',
content=‘ ?',
location=' ')
Post.objects.all()
[<Post: My First Trip>, <Post: My Second Trip>, <Post:
Django >]
Post.objects.filter(pk__gt=1)
[<Post: My Second Trip>, <Post: Django >]