Django-Setup All commands

py -m venv portfolio

portfolio\Scripts\activate.bat

py -m pip install Django

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django-admin startproject <project_name>: Creates a new Django project with the specified name.

python manage.py runserver: Starts the development server, allowing you to view and test your Django application locally.

python manage.py startapp <app_name>: Creates a new Django app within your project, with the specified name.

python manage.py migrate: Applies any pending database migrations to synchronize the database schema with your models.

python manage.py makemigrations: Creates new database migration files based on changes made to your models.

python manage.py createsuperuser: Creates a new superuser account for accessing the Django admin interface.

python manage.py collectstatic: Collects all static files from your apps into a single location for deployment.

python manage.py test: Runs all the tests defined in your Django project.

python manage.py shell: Starts the Django shell, an interactive Python shell with access to your Django project.

python manage.py runscript <script_name>: Runs a custom Python script within the Django context.

1. Creating Objects:

   pythonCopy code
   # Import the model class
   from myapp.models import MyModel
   
   # Create a new object
   obj = MyModel(name='John', age=25)
   
   # Save the object to the database
   obj.save()
   

2. Retrieving Objects:

   pythonCopy code
   # Import the model class
   from myapp.models import MyModel
   
   # Retrieve all objects
   all_objects = MyModel.objects.all()
   
   # Retrieve a specific object by primary key
   obj = MyModel.objects.get(pk=1)
   
   # Retrieve objects based on a filter condition
   filtered_objects = MyModel.objects.filter(name='John')
   

3. Updating Objects:

   pythonCopy code
   # Import the model class
   from myapp.models import MyModel
   
   # Retrieve an object
   obj = MyModel.objects.get(pk=1)
   
   # Update the object's attributes
   obj.name = 'Jane'
   obj.age = 30
   
   # Save the updated object
   obj.save()
   

4. Deleting Objects:

   pythonCopy code
   # Import the model class
   from myapp.models import MyModel
   
   # Retrieve an object
   obj = MyModel.objects.get(pk=1)
   
   # Delete the object
   obj.delete()
   

5. Querying with Conditions:

   pythonCopy code
   # Import the model class
   from myapp.models import MyModel
   from django.db.models import Q
   
   # Retrieve objects matching a condition
   objects = MyModel.objects.filter(age__gte=18)
   
   # Retrieve objects matching multiple conditions using Q objects
   objects = MyModel.objects.filter(Q(name='John') | Q(age__gte=30))
   

6. Related Objects:

   pythonCopy code
   # Import the model classes
   from myapp.models import Author, Book
   
   # Retrieve all books written by a specific author
   author = Author.objects.get(name='Jane Doe')
   books = author.book_set.all()
   
   # Retrieve the author of a specific book
   book = Book.objects.get(title='My Book')
   author = book.author