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

get_db_prep_save(value, connection) [source] Same as the get_db_prep_value()

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

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

lhs The left-hand side - what is being looked up. The object must follow the Query Expression API

DecimalField.max_digits The maximum number of digits allowed in the number. Note that this number must be greater than or equal

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

Field.one_to_one Boolean flag that is True if the field has a one-to-one relation, such as a OneToOneField;

exists() Returns True if the QuerySet contains any results, and False if not. This tries