Model.clean() [source] This method should be used to provide custom model validation, and

class TruncSecond(expression, output_field=None, tzinfo=None, **extra) [source]

class Field [source] Field is an abstract class that represents a database table

defer(*fields) In some complex data-modeling situations, your models might contain a lot of fields, some of which could contain

SET_DEFAULT [source] Set the ForeignKey to its default value; a default for

ManyToManyField.related_query_name Same as ForeignKey.related_query_name.

Field.validators A list of validators to run for this field. See the validators documentation for more

sample By default, StdDev returns the population standard deviation. However, if sample=True, the

FilePathField.allow_files Optional. Either True or False. Default is True. Specifies

lhs The left-hand side - what is being transformed. It must follow the Query Expression API