Kursusindhold

Django ORM Ninja: Advanced Techniques for Developers

1. Introduction to Django ORM

Introduction to the Course Introduction to the ORM Start a New Project Initialize a New Project

2. Models, datatypes, and fields

Defining The First Model Field Data Types Define Other Models Migrations Admin Interface

3. Queries

Create Query Retrieve Query Lazy Queries Ordering and Slicing Updating Deleting

4. Relations

Many-to-One ForeignKey Arguments One-to-One Many-to-Many

5. Complex Queries

Field Lookups Q and F Objects Aggregations Annotations Minimazing Database Hints

6. Advanced

Class Meta Constrains Transactions Basics User Model

Deleting

Deleting an object is as straightforward as creating or updating one. You simply define the object to delete and then call the delete() method.

For example, let's create a test author for deletion:

author4 = Author.objects.create(first_name="TestName", last_name="TestName")

Note

The save() method isn't necessary here as create() already saves the object.

Now, our table has a new instance, and Author.objects.all() will show information about four authors.

The most common approach to delete is to retrieve the instance by its ID and then delete it:

Author.objects.get(id=4).delete()

No need to save the changes after deletion.

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Sektion 3. Kapitel 6

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Kursusindhold

Django ORM Ninja: Advanced Techniques for Developers

1. Introduction to Django ORM

Introduction to the Course Introduction to the ORM Start a New Project Initialize a New Project

2. Models, datatypes, and fields

Defining The First Model Field Data Types Define Other Models Migrations Admin Interface

3. Queries

Create Query Retrieve Query Lazy Queries Ordering and Slicing Updating Deleting

4. Relations

Many-to-One ForeignKey Arguments One-to-One Many-to-Many

5. Complex Queries

Field Lookups Q and F Objects Aggregations Annotations Minimazing Database Hints

6. Advanced

Class Meta Constrains Transactions Basics User Model

Deleting

Deleting an object is as straightforward as creating or updating one. You simply define the object to delete and then call the delete() method.

For example, let's create a test author for deletion:

author4 = Author.objects.create(first_name="TestName", last_name="TestName")

Note

The save() method isn't necessary here as create() already saves the object.

Now, our table has a new instance, and Author.objects.all() will show information about four authors.

The most common approach to delete is to retrieve the instance by its ID and then delete it:

Author.objects.get(id=4).delete()

No need to save the changes after deletion.

Var alt klart?

Tak for dine kommentarer!

Sektion 3. Kapitel 6

Django ORM Ninja: Advanced Techniques for Developers

Deleting

1. How do you delete an object in Django?

2. What happens when you execute Author.objects.get(id=4).delete() in Django?

3. After deleting an object in Django, what is required to reflect this change in the database?

Django ORM Ninja: Advanced Techniques for Developers

Deleting

1. How do you delete an object in Django?

2. What happens when you execute Author.objects.get(id=4).delete() in Django?

3. After deleting an object in Django, what is required to reflect this change in the database?