Primary key behavior in Django - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a primary key field in a Django model.

Django

class Product(models.Model):
    id = models.[1](primary_key=True)

Drag options to blanks, or click blank then click option'

ACharField

BTextField

CForeignKey

DAutoField

Attempts:

3 left

💡 Hint

Common Mistakes

Using CharField or TextField as primary key without unique constraints.

Using ForeignKey instead of a primary key field.

The AutoField is used to create an auto-incrementing primary key in Django models.

2fill in blank

medium

Complete the code to set a custom field as the primary key in a Django model.

Django

class Employee(models.Model):
    employee_id = models.[1](primary_key=True, max_length=10)

Drag options to blanks, or click blank then click option'

AIntegerField

BCharField

CDateField

DBooleanField

Attempts:

3 left

💡 Hint

Common Mistakes

Using IntegerField without auto-increment for string IDs.

Forgetting to set primary_key=True.

To use a string as a primary key, CharField with primary_key=True is used.

3fill in blank

hard

Fix the error in the model definition to correctly define a primary key.

Django

class Order(models.Model):
    order_number = models.IntegerField()
    [1] = models.AutoField(primary_key=True)

Drag options to blanks, or click blank then click option'

Apk

Border_id

Cid

Dorder_number

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same name for two fields causes errors.

Not defining a primary key when needed.

The primary key field should have a valid variable name like id to avoid conflicts and follow Django conventions.

4fill in blank

hard

Fill both blanks to create a model with a custom primary key and a regular field.

Django

class Category(models.Model):
    [1] = models.[2](primary_key=True, max_length=20)
    name = models.CharField(max_length=100)

Drag options to blanks, or click blank then click option'

Acode

BCharField

CIntegerField

Did

Attempts:

3 left

💡 Hint

Common Mistakes

Using id when a custom key is intended.

Using IntegerField for string keys.

Using code as the field name and CharField with primary_key=True defines a custom string primary key.

5fill in blank

hard

Fill all three blanks to create a model with an auto-increment primary key, a foreign key, and a text field.

Django

class Comment(models.Model):
    [1] = models.[2](primary_key=True)
    post = models.[3]('Post', on_delete=models.CASCADE)
    content = models.TextField()

Drag options to blanks, or click blank then click option'

Aid

BAutoField

CForeignKey

Dcomment_id

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong field types for primary key or foreign key.

Forgetting to set primary_key=True on the key field.

The id field uses AutoField as primary key. The post field is a ForeignKey to the Post model.