Understanding the "id" Field in Django Tables: A Primer on Primary Keys

• In Django, each model in your application's database is represented by a table.

• Every table in Django has an automatically generated primary key field called "id" by default, which is an integer and serves as a unique identifier for each row in the table.

• When you define a model class in Django, you don't need to explicitly specify the "id" field as it is created automatically. However, if you want to access the primary key field explicitly or refer to it in your code, you can do so using the attribute `id` on an instance of the model.

Here's an example of a Django model with an automatically generated "id" field:

    from django.db import models

    class MyModel(models.Model):

        # Other fields of the model

        name = models.CharField(max_length=100)

        age = models.IntegerField()

    # Creating an instance of the model

    instance = MyModel.objects.create(name='John', age=25)

    # Accessing the id field

    print(instance.id)  # Prints the unique id of the instance

• Note that if you explicitly define a primary key field in your model, Django will not generate the "id" field automatically. In such cases, you would need to use the explicitly defined primary key field instead of "id".