Django Cheatsheet

Welcome to the Django Cheatsheet repository! This repository serves as a comprehensive reference guide for Django, a high-level Python web framework. Whether you're a beginner learning Django or an experienced developer seeking a quick reference, this cheatsheet is designed to help you build powerful and scalable web applications with ease.

The cheatsheet covers various aspects of Django, including project setup, models, views, templates, forms, authentication, database queries, URL routing, static files, testing, and deployment. Each section provides concise explanations, code snippets, and best practices to assist you in mastering Django's key concepts.

Feel free to explore this cheatsheet to enhance your Django skills, streamline your development process, and create robust web applications. The cheatsheet is written in Markdown format, making it easy to view, copy, and paste into your own projects.

If you have any suggestions or would like to contribute to this cheatsheet, please feel free to open an issue or submit a pull request. Let's collaborate and make this cheatsheet a valuable resource for the Django community!

Happy Django coding!

Table of Contents

1. Introduction to Django
2. Django Installation
3. Django Project Structure
4. Creating a Django Project
5. Django Apps
6. Models and Databases
7. Creating Models
8. Defining Model Fields
9. Migrations
10. Django Admin
11. Registering Models in Admin
12. URL Patterns and Routing
13. Django Views
14. Function-Based Views
15. Class-Based Views
16. Templates and Template Language
17. Template Variables and Filters
18. Template Inheritance
19. Static Files and Media Files
20. Django Forms
21. Form Validation
22. Working with Form Data
23. Model Forms
24. Form Widgets
25. File Uploads
26. Authentication and Authorization
27. User Authentication with Django's User Model
28. Custom User Model
29. Permissions and Authorization
30. Django Middleware
31. Working with Sessions
32. Caching with Django
33. Django Signals
34. Django Template Tags and Filters
35. Custom Template Tags and Filters
36. Internationalization and Localization
37. Django Testing
38. Unit Testing with Django
39. Integration Testing with Django
40. Test Fixtures
41. Working with QuerySets
42. Filtering QuerySets
43. QuerySet Methods
44. Aggregation and Annotation
45. Relationships and Foreign Keys
46. Many-to-Many Relationships
47. One-to-One Relationships
48. Django ORM
49. Querying the Database
50. Creating and Updating Objects
51. Deleting Objects
52. Common Datetime Formats in Django
53. Django REST Framework Basics
54. Serializers in Django REST Framework
55. Authentication and Permissions in Django REST Framework
56. API Views and ViewSets
57. File Uploads in Django REST Framework
58. Pagination in Django REST Framework
59. Versioning in Django REST Framework
60. Django Deployment Best Practices
61. Troubleshooting Common Django Issues

Common Datetime Formats in Django

When working with datetime fields in a Django project, you have the flexibility to customize the display format of dates and times. Django provides various format codes that you can use to represent datetime values according to your preferences. Below is a list of common datetime formats that you can use in your Django project.

Date Formats %Y - Year with century (e.g., 2023)
%y - Year without century (e.g., 23)
%m - Month as a zero-padded decimal number (01 to 12)
%b - Abbreviated month name (Jan, Feb, etc.)
%B - Full month name (January, February, etc.)
%d - Day of the month as a zero-padded decimal number (01 to 31)

Example: "2023-04-08"

DATE_FORMAT = "%Y-%m-%d"

Time Formats %H - Hour (24-hour clock) as a zero-padded decimal number (00 to 23)
%I - Hour (12-hour clock) as a zero-padded decimal number (01 to 12)
%M - Minute as a zero-padded decimal number (00 to 59)
%S - Second as a zero-padded decimal number (00 to 59)
%p - AM or PM

Example: "15:30:00"

TIME_FORMAT = "%H:%M:%S"

Datetime Formats
%Y-%m-%d %H:%M:%S - Datetime with year, month, day, hour, minute, and second (e.g., 2023-04-08 15:30:00)
%Y-%m-%d %I:%M:%S %p - Datetime with year, month, day, 12-hour clock, minute, second, and AM/PM (e.g., 2023-04-08 03:30:00 PM)

Example: "2023-04-08 15:30:00"

DATETIME_FORMAT = "%Y-%m-%d %H:%M:%S"

Custom Formats You can also create custom datetime formats by combining the above format codes and any additional characters you need.

Usage To apply a datetime format, update the respective format setting in your project's settings.py file. Remember to use these formats within Django's context, such as templates and serializers, to ensure consistent presentation of datetime values.

Feel free to choose the formats that best suit your project's requirements and design.