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Django ORM Ninja: Advanced Techniques for Developers

MigrationsMigrations

What are migrations? Migrations are looking for changes in the schema of the database. A schema is a set of tables. Django ORM uses the 'Code First' approach, meaning we first change the code, and then migrations help update the database state to match the code. Currently, we don't have a database set up; we only have the code for our models.

Let's start with this command:

Here, db is the application for which we are creating migrations. Now, we have two new files: the db.sqlite3 file and 0001_initial.py in the migrations folder. The db.sqlite3 file is not yet functional.

Executing python manage.py migrate will complete all operations written in the 0001_initial.py file. After running this command, we should see various messages indicating the progress.

1. What is the primary purpose of migrations in Django?
2. What does the 'Code First' approach in Django ORM imply?
3. What does the command 'python manage.py makemigrations db' do?
4. What is created as a result of running 'python manage.py makemigrations db'?
5. What is the purpose of the 'python manage.py migrate' command?

What is the primary purpose of migrations in Django?

Select the correct answer

What does the 'Code First' approach in Django ORM imply?

Select the correct answer

What does the command 'python manage.py makemigrations db' do?

Select the correct answer

What is created as a result of running 'python manage.py makemigrations db'?

Select the correct answer

What is the purpose of the 'python manage.py migrate' command?

Select the correct answer

Everything was clear?

Section 2. Chapter 4
course content

Course Content

Django ORM Ninja: Advanced Techniques for Developers

1. Introduction to Django ORM

Introduction to the CourseIntroduction to the ORMStart a New ProjectInitialize a New Project

2. Models, datatypes, and fields

Defining The First ModelField Data TypesDefine Other ModelsMigrationsAdmin Interface

3. Queries

Create QueryRetrieve QueryLazy QueriesOrdering and SlicingUpdatingDeleting

4. Relations

Many-to-OneForeignKey ArgumentsOne-to-OneMany-to-Many

5. Complex Queries

Field LookupsQ and F ObjectsAggregationsAnnotationsMinimazing Database Hints

6. Advanced

Class MetaConstrainsTransactions BasicsUser Model

Django ORM Ninja: Advanced Techniques for Developers

MigrationsMigrations

What are migrations? Migrations are looking for changes in the schema of the database. A schema is a set of tables. Django ORM uses the 'Code First' approach, meaning we first change the code, and then migrations help update the database state to match the code. Currently, we don't have a database set up; we only have the code for our models.

Let's start with this command:

Here, db is the application for which we are creating migrations. Now, we have two new files: the db.sqlite3 file and 0001_initial.py in the migrations folder. The db.sqlite3 file is not yet functional.

Executing python manage.py migrate will complete all operations written in the 0001_initial.py file. After running this command, we should see various messages indicating the progress.

1. What is the primary purpose of migrations in Django?
2. What does the 'Code First' approach in Django ORM imply?
3. What does the command 'python manage.py makemigrations db' do?
4. What is created as a result of running 'python manage.py makemigrations db'?
5. What is the purpose of the 'python manage.py migrate' command?

What is the primary purpose of migrations in Django?

Select the correct answer

What does the 'Code First' approach in Django ORM imply?

Select the correct answer

What does the command 'python manage.py makemigrations db' do?

Select the correct answer

What is created as a result of running 'python manage.py makemigrations db'?

Select the correct answer

What is the purpose of the 'python manage.py migrate' command?

Select the correct answer

Everything was clear?

Section 2. Chapter 4
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