Crowdly

Suppose you want to count the number of books in Django.
books = Book.objects.all()
Which implementation would be fastest?

Database level Implementation – books.count()

Template Language Implementation – {{ books | length }}

Python Implementation – len(books)

None of the above

In Post.models.filter() you can pass multiple parameters in filter() to narrow your result/s.

True

False

What are Migrations in Django?

Migrations are files where Django stores changes to your models.

All of the above

They are files saved in migrations directory.

They are created when you run makemigrations command.

Which manage.py command creates the database tables using the models described?

sqlall

createtables

validate

syncdb

Is it possible to dump the base of a part of the project (for example, an application) in json format and, if so, how to do it?

there is no such possibility

dumpdata appname >> '/app_dir/MyData.json'

migrate appname 'MyData.json'

dump appname /home/user/project/MyData.json

How do I make a model field optional?

The admin interface treats all fields as optional

Add req = False to field

Add to field required = False

Add blank = True to the field

How to set the model to sort by id?

self.ordering = ["id"]

self.sorting = ["id"]

class Meta:
    ordering = ["id"]

class Sort:
    ordering = ["id"]

What does {{ name }} mean in Django Templates?

The name will be replaced with values of Python variable.

It will be displayed as name in HTML.

None of the above

{{ name }} will be the output.

After you make a new ‘app’ in your existing Django project, how do you get Django to notice it

In settings.py, add the app to the PROJECT_APPS variable.

Run the `manage.py syncdb` command.

Run the `manage.py validate` command, and then start a new shell.

No additional action is required, Django notices new apps automatically.

In settings.py, add the new app to the INSTALLED_APPS variable.