The document discusses Django's contenttypes framework which allows working with models generically without having to know the specific model being used. It presents several patterns for implementing generic functionality, including self-aware models, improved generic views, universal URLs, and dynamic forms. The key benefits are the ability to perform CRUD operations and create relationships between any objects without having to pre-program for each specific model.
Django's ORM is extremely powerful, allowing you to manage your data without ever going near a line of SQL and hiding a multitude of complexities. But its power can sometimes be a curse rather than a blessing, multiplying queries without your knowledge and bringing your database to its knees.
In this session I explain what's going on behind the scenes and present some techniques to make your ORM use more efficient, showing how to monitor what's going on and how to better deal with relationships, indexes and more.
This talk was presented at Europython 2010 in Birmingham.
JavaScript is the language of Web. It has its own styles and vocabulary, which is very different from languages we are familiar with like C, C++, Java, C# etc. While not having classes and functions to be acting as FIRST CLASS CITIZENS for most of the tasks sometimes its difficult to manage very large JavaScript files. And, there comes the need of a common pattern for writing efficient JavaScript.
Django's ORM is extremely powerful, allowing you to manage your data without ever going near a line of SQL and hiding a multitude of complexities. But its power can sometimes be a curse rather than a blessing, multiplying queries without your knowledge and bringing your database to its knees.
In this session I explain what's going on behind the scenes and present some techniques to make your ORM use more efficient, showing how to monitor what's going on and how to better deal with relationships, indexes and more.
This talk was presented at Europython 2010 in Birmingham.
JavaScript is the language of Web. It has its own styles and vocabulary, which is very different from languages we are familiar with like C, C++, Java, C# etc. While not having classes and functions to be acting as FIRST CLASS CITIZENS for most of the tasks sometimes its difficult to manage very large JavaScript files. And, there comes the need of a common pattern for writing efficient JavaScript.
در این جلسه به بررسی بحث برنامه نویسی شی گرا و کلاس ها در پایتون پرداختیم
PySec101 Fall 2013 J7E1 By Mohammad Reza Kamalifard
Talk About:
Object oriented programming and Classes in Python
A talk delivered to the Philadelphia Python User Group on 09/17/15
Models form the backbone of most Django sites. They contain the fields and behaviors of the data your site is using. The proper planning and implementation of models is one of the first steps to creating powerful and reusable Django apps. It’s also crucial for avoiding pitfalls and complex workarounds down the line. In this talk you’ll hear about: -
• Django model fields and methods
• Model inheritance
• Relational databases
• Migrations
• How to access the data stored within your models
QA Lab: тестирование ПО. Станислав Шмидт: "Self-testing REST APIs with API Fi...GeeksLab Odessa
5.12.15 QA Lab: тестирование программного обеспечения.
Upcoming events: goo.gl/I2gJ4H
Доклад о Play-Swagger, проекте с открытым исходным кодом, разрабатываемом в Zalando с использованием Scala и Play Framework. О том, как использование API First и Swagger позволяет ускорить процесс разработки, упростить взаимодействие команд и повысить качество продукта.
This is a small introduction to the django framework I did for fellow engineers at Anevia. It touches on many of the major concepts and core features of django and gives a typical workflow built about the example of a minimalist blog engine.
در این جلسه به بررسی بحث برنامه نویسی شی گرا و کلاس ها در پایتون پرداختیم
PySec101 Fall 2013 J7E1 By Mohammad Reza Kamalifard
Talk About:
Object oriented programming and Classes in Python
A talk delivered to the Philadelphia Python User Group on 09/17/15
Models form the backbone of most Django sites. They contain the fields and behaviors of the data your site is using. The proper planning and implementation of models is one of the first steps to creating powerful and reusable Django apps. It’s also crucial for avoiding pitfalls and complex workarounds down the line. In this talk you’ll hear about: -
• Django model fields and methods
• Model inheritance
• Relational databases
• Migrations
• How to access the data stored within your models
QA Lab: тестирование ПО. Станислав Шмидт: "Self-testing REST APIs with API Fi...GeeksLab Odessa
5.12.15 QA Lab: тестирование программного обеспечения.
Upcoming events: goo.gl/I2gJ4H
Доклад о Play-Swagger, проекте с открытым исходным кодом, разрабатываемом в Zalando с использованием Scala и Play Framework. О том, как использование API First и Swagger позволяет ускорить процесс разработки, упростить взаимодействие команд и повысить качество продукта.
This is a small introduction to the django framework I did for fellow engineers at Anevia. It touches on many of the major concepts and core features of django and gives a typical workflow built about the example of a minimalist blog engine.
Data Migrations in the App Engine DatastoreRyan Morlok
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.
Is your favorite ring slipping and sliding on your finger? You're not alone. Must Read this Guide on What To Do If Your Ring Is Too Big as shared by the experts of Andrews Jewelers.
What Makes Candle Making The Ultimate Bachelorette CelebrationWick & Pour
The above-discussed factors are the reason behind an increasing number of millennials opting for candle making events to celebrate their bachelorette. If you are in search of any theme for your bachelorette then do opt for a candle making session to make your celebration memorable for everyone involved.
From Stress to Success How Oakland's Corporate Wellness Programs are Cultivat...Kitchen on Fire
Discover how Oakland's innovative corporate wellness initiatives are transforming workplace culture, nurturing the well-being of employees, and fostering a thriving environment. From comprehensive mental health support to flexible work arrangements and holistic wellness workshops, these programs are empowering individuals to navigate stress effectively, leading to increased productivity, satisfaction, and overall success.
La transidentité, un sujet qui fractionne les FrançaisIpsos France
Ipsos, l’une des principales sociétés mondiales d’études de marché dévoile les résultats de son étude Ipsos Global Advisor “Pride 2024”. De ses débuts aux Etats-Unis et désormais dans de très nombreux pays, le mois de juin est traditionnellement consacré aux « Marches des Fiertés » et à des événements festifs autour du concept de Pride. A cette occasion, Ipsos a réalisé une enquête dans vingt-six pays dressant plusieurs constats. Les clivages des opinions entre générations s’accentuent tandis que le soutien à des mesures sociétales et d’inclusion en faveur des LGBT+ notamment transgenres continue de s’effriter.
Johnny Depp Long Hair: A Signature Look Through the Yearsgreendigital
Johnny Depp, synonymous with eclectic roles and unparalleled acting prowess. has also been a significant figure in fashion and style. Johnny Depp long hair is a distinctive trademark among the various elements that define his unique persona. This article delves into the evolution, impact. and cultural significance of Johnny Depp long hair. exploring how it has contributed to his iconic status.
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Introduction
Johnny Depp is an actor known for his chameleon-like ability to transform into a wide range of characters. from the eccentric Captain Jack Sparrow in "Pirates of the Caribbean" to the introspective Edward Scissorhands. His long hair is one constant throughout his evolving roles and public appearances. Johnny Depp long hair is not a style choice but a significant aspect of his identity. contributing to his allure and mystique. This article explores the journey and significance of Johnny Depp long hair. highlighting how it has become integral to his brand.
The Early Years: A Budding Star with Signature Locks
1980s: The Rise of a Young Heartthrob
Johnny Depp's journey in Hollywood began in the 1980s. with his breakout role in the television series "21 Jump Street." During this time, his hair was short, but it was already clear that Depp had a penchant for unique and edgy styles. By the decade's end, Depp started experimenting with longer hair. setting the stage for a lifelong signature.
1990s: From Heartthrob to Icon
The 1990s were transformative for Johnny Depp his career and personal style. Films like "Edward Scissorhands" (1990) and "Benny & Joon" (1993) saw Depp sporting various hair lengths and styles. But, his long, unkempt hair in "What's Eating Gilbert Grape" (1993) began to draw significant attention. This period marked the beginning of Johnny Depp long hair. which became a defining feature of his image.
The Iconic Roles: Hair as a Character Element
Edward Scissorhands (1990)
In "Edward Scissorhands," Johnny Depp's character had a wild and mane that complemented his ethereal and misunderstood persona. This role showcased how long hair Johnny Depp could enhance a character's depth and mystery.
Captain Jack Sparrow: The Pirate with Flowing Locks
One of Johnny Depp's iconic roles is Captain Jack Sparrow from the "Pirates of the Caribbean" series. Sparrow's long, dreadlocked hair symbolised his rebellious and unpredictable nature. The character's look, complete with beads and trinkets woven into his hair. was a collaboration between Depp and the film's costume designers. This style became iconic and influenced fashion trends and Halloween costumes worldwide.
Other Memorable Characters
Depp's long hair has also been featured in other roles, such as Ichabod Crane in "Sleepy Hollow" (1999). and Roux in "Chocolat" (2000). In these films, his hair added a layer of authenticity and depth to his characters. proving that Johnny Depp with long hair is more than a style—it's a storytelling tool.
Off-Screen Influenc
3. CONTENTTYPES An application that can track all of the models installed in your Django-powered project, providing a high-level, generic interface for working with your models
6. PROBLEM blog = Blog.objects.get( pk = 1 ) posts = Post.objects.filter( blog = blog ) features = Post.objects.filter( feature = True ) 3+ URLs 3+ view function 3+ templates
7. PROBLEM blog = Blog.objects.get( pk = 1 ) posts = Post.objects.filter( blog = blog ) features = Post.objects.filter( feature = True ) {%for post in posts %} {{ post.title }} {{ post.like_set.count }} likes {%endfor%}
9. GENERIC VIEWS? Take certain common idioms and patterns found in view development and abstract them so that you can quickly write common views of data without having to write too much code
17. MORE PROBLEMS classFeature(models.Model): title = models.CharField() post = models.ForeignKey( Post ) likers = models.ForeignKey( User ) likes = models.IntegerField()
18. CONTENTTYPES An application that can track all of the models installed in your Django-powered project, providing a high-level, generic interface for working with your models
19. CONTENTTYPES Use the ORM without knowing what kind of objects you might be working with.
20. CONTENTTYPES Use the ORM without knowing what kind of objects you might be working with. EVER.
31. MORE PROBLEMS classLike( models.Model ): content_type = models.ForeignKey( ContentType ) object_id = models.PositiveIntegerField() content_object = generic.GenericForeignKey( ... ) likers = models.ManyToMany( User ) deflike_view( request, object_id ): post = Post.objects.get( pk = object_id ) like = Like( object_id = post, ??? )
32. GENERIC GEMS from django.contrib.contenttypes.models importContentType from django.contrib.auth.models importUser >>> type = ContentType.objects.get_for_model( User ) >>> type >>> <ContentType: user > >>> model = type.model_class() >>> model >>> <class: 'django.contrib.auth.models.User'>
36. SELF AWARE MODEL classSelfAwareModel(models.Model): def get_ct( self ): ''' Returns the Content Type for this instance''' return ContentType.objects.get_for_model(self) def get_ct_id( self ): ''' Returns the id of the content type for this instance''' return self.get_ct().pk def get_app_label( self ): return self.get_ct().app_label def get_model_name( self ): return self.get_ct().model classMeta: abstract = True
37. SELF AWARE MODEL classSelfAwareModel(models.Model): def get_ct( self ): ''' Returns the Content Type for this instance''' return ContentType.objects.get_for_model(self) def get_ct_id( self ): ''' Returns the id of the content type for this instance''' return self.get_ct().pk def get_app_label( self ): return self.get_ct().app_label def get_model_name( self ): return self.get_ct().model classMeta: abstract = True CACHED BY DJANGO
38. SELF AWARE MODEL classSelfAwareModel(models.Model): def get_ct( self ): ''' Returns the Content Type for this instance''' return ContentType.objects.get_for_model(self) def get_ct_id( self ): ''' Returns the id of the content type for this instance''' return self.get_ct().pk def get_app_label( self ): return self.get_ct().app_label def get_model_name( self ): return self.get_ct().model classMeta: abstract = True CACHED BY DJANGO self.__class__._cache[self.db][key]
39. SELF AWARE EVERYTHING classPost( SelfAwareModel ): title = models.CharField() blog = models.ForeignKey( Blog ) body = models.TextField() slug = models.SlugField() likers = models.ForeignKey( User ) likes = models.IntegerField()
40. SELF AWARE EVERYTHING classPost( SelfAwareModel ): title = models.CharField() blog = models.ForeignKey( Blog ) body = models.TextField() slug = models.SlugField() likers = models.ForeignKey( User ) likes = models.IntegerField() ALL MODELS SUBCLASSE SELFAWAREMODEL
41. SELF AWARE EVERYTHING classPost( SelfAwareModel ): title = models.CharField() blog = models.ForeignKey( Blog ) body = models.TextField() slug = models.SlugField() likers = models.ForeignKey( User ) likes = models.IntegerField() @permalink def get_absolute_url( self ): ... >>> post = Post.objects.latest() >>> obj.get_ct() >>> <ContentType: post>
42. SELF AWARE EVERYTHING classPost( SelfAwareModel ): title = models.CharField() blog = models.ForeignKey( Blog ) body = models.TextField() slug = models.SlugField() likers = models.ForeignKey( User ) likes = models.IntegerField() @permalink def get_absolute_url( self ): ... I KNOW MY CONTENT TYPE >>> post = Post.objects.latest() >>> obj.get_ct() >>> <ContentType: post>
62. MAGIC FORMS defedit_object( request, ct_id, obj_id ): obj = utils.get_object( ct_id, obj_id ) form = ??? Can't predefine ModelForm when you don't know what model you're working with