Using the Metaclass in Django

Question

Can someone explain why the metaclass is used in the following example.

Example:

Class Employee (models.Model): name = models.ForeignKey(name) Gender = models.IntegerField() class Meta: ordering = ["Gender"] 

Thanks.

Answer 1

Because the author / programmer wants to sort the results by the value of the Gender field.

Answer 2

Django models use the Meta class to contain additional model information that does not have to be contained in the model class itself. Note that this is not the same as the Python metaclass ; This is a completely different topic.

In this case, he organizes or sorts the queries for this model by the gender field

Answer 3

In this case, it defines the default field for ordering if you do not provide ORDER_BY in your request.

Answer 4

This is explained in the Django documentation for models.

 https://docs.djangoproject.com/en/dev/topics/db/models/ 

Give metadata to your model using the inner Meta class, for example:

 Class Employee (models.Model): .... class Meta: ordering = ["attribute-X"] 

Another useful option can be used in the Meta class - verbose_name.