db.models.Field.rel_db_type()

rel_db_type(connection) [source]

New in Django 1.10.

Returns the database column data type for fields such as ForeignKey and OneToOneField that point to the Field, taking into account the connection.

See Custom database types for usage in custom fields.

There are three main situations where Django needs to interact with the database backend and fields:

when it queries the database (Python value -> database backend value)
when it loads data from the database (database backend value -> Python value)
when it saves to the database (Python value -> database backend value)

When querying, get_db_prep_value() and get_prep_value() are used:

Links:

https://docs.djangoproject.com/en/1.10/ref/models/fields/#django.db.models.Field.rel_db_type

doc_Django

2016-10-09 18:35:29

Comments

Popular Articles

db.models.Field.db_type() db_type(connection) [source] Returns the database column data type for the Field, taking into account the connection. See Custom database types fo

db.models.Field class Field [source] Field is an abstract class that represents a database table column. Django uses fields to create the database table (db_type(

db.models.Field.model Field.model Returns the model on which the field is defined. If a field is defined on a superclass of a model, model will refer to the superclass,

db.models.Field.default Field.default The default value for the field. This can be a value or a callable object. If callable it will be called every time a new object is

db.models.Field.hidden Field.hidden Boolean flag that indicates if a field is used to back another non-hidden field’s functionality (e.g. the content_type and object_id