Django Default CRUD

In Django, default CRUD (Create, Read, Update, Delete) operations refer to the built-in capabilities provided by Django to handle these fundamental database actions through its models and views. Here’s an overview:

1. Create

You can use Django’s ORM (Object Relational Mapping) to add new entries to the database.

Example:

obj = MyModel.objects.create(field1="value1", field2="value2")

The save() method can also be used after instantiating a model object:

obj = MyModel(field1="value1", field2="value2")
obj.save()

2. Read

Django provides several ways to retrieve data from the database using the QuerySet API.

Example:

Retrieve all objects: MyModel.objects.all()

Filter objects: MyModel.objects.filter(field1=”value1″)

Get a single object: MyModel.objects.get(id=1)

3. Update

To update an object, retrieve it first, modify its fields, and then call save()

obj = MyModel.objects.get(id=1)
obj.field1 = "new_value"
obj.save()

Bulk updates can be performed with update()

MyModel.objects.filter(field1="value1").update(field2="new_value")

4. Delete

To delete an object, use its delete() method:

obj = MyModel.objects.get(id=1)
obj.delete()

Bulk deletion:

MyModel.objects.filter(field1="value1").delete()

Default CRUD in Django Admin

The Django admin interface provides a default CRUD GUI for managing models:

Create: Add new entries through the admin form.

Read: View existing entries in a list or detail view.

Update: Edit entries using the admin form.

Delete: Remove entries through the admin interface.