Ticket #20001: bigauto.diff

django/db/backends/__init__.py

@@ -1055 +1055 @@
         if internal_type == 'FloatField':
             return float(value)
         elif (internal_type and (internal_type.endswith('IntegerField')
-                                 or internal_type == 'AutoField')):
+                                 or internal_type.endswith('AutoField'))):
             return int(value)
         return value
 

django/db/backends/mysql/creation.py

@@ -7 +7 @@
     # If a column type is set to None, it won't be included in the output.
     data_types = {
         'AutoField':         'integer AUTO_INCREMENT',
+        'BigAutoField':      'bigint AUTO_INCREMENT',
         'BinaryField':       'longblob',
         'BooleanField':      'bool',
         'CharField':         'varchar(%(max_length)s)',

django/db/backends/oracle/creation.py

@@ -17 +17 @@
 
     data_types = {
         'AutoField':                    'NUMBER(11)',
+        'BigAutoField':                 'NUMBER(19)',
         'BinaryField':                  'BLOB',
         'BooleanField':                 'NUMBER(1) CHECK (%(qn_column)s IN (0,1))',
         'CharField':                    'NVARCHAR2(%(max_length)s)',

django/db/backends/postgresql_psycopg2/creation.py

@@ -11 +11 @@
     # If a column type is set to None, it won't be included in the output.
     data_types = {
         'AutoField':         'serial',
+        'BigAutoField':      'bigserial',
         'BinaryField':       'bytea',
         'BooleanField':      'boolean',
         'CharField':         'varchar(%(max_length)s)',

django/db/backends/sqlite3/base.py

@@ -248 +248 @@
         internal_type = field.get_internal_type()
         if internal_type == 'DecimalField':
             return util.typecast_decimal(field.format_number(value))
-        elif internal_type and internal_type.endswith('IntegerField') or internal_type == 'AutoField':
+        elif (internal_type and internal_type.endswith('IntegerField') or
+                internal_type.endswith('AutoField')):
             return int(value)
         elif internal_type == 'DateField':
             return parse_date(value)

django/db/backends/sqlite3/creation.py

@@ -9 +9 @@
     # schema inspection is more useful.
     data_types = {
         'AutoField':                    'integer',
+        'BigAutoField':                 'integer',
         'BinaryField':                  'BLOB',
         'BooleanField':                 'bool',
         'CharField':                    'varchar(%(max_length)s)',

django/db/models/fields/__init__.py

@@ -215 +215 @@
         self.run_validators(value)
         return value
 
+    def _internal_to_db_type(self, internal_type, connection):
+        data = DictWrapper(self.__dict__, connection.ops.quote_name, "qn_")
+        try:
+            return connection.creation.data_types[internal_type] % data
+        except KeyError:
+            return None
+
     def db_type(self, connection):
         """
         Returns the database column data type for this field, for the provided
@@ -235 +242 @@
         # mapped to one of the built-in Django field types. In this case, you
         # can implement db_type() instead of get_internal_type() to specify
         # exactly which wacky database column type you want to use.
-        data = DictWrapper(self.__dict__, connection.ops.quote_name, "qn_")
-        try:
-            return (connection.creation.data_types[self.get_internal_type()]
-                    % data)
-        except KeyError:
-            return None
+        return self._internal_to_db_type(self.get_internal_type(), connection)
+
+    def rel_db_type(self, connection):
+        """
+        Returns the database column data type for related field
+        referencing to this.
+        """
+        return self.db_type(connection)
 
     @property
     def unique(self):
@@ -530 +539 @@
         'invalid': _("'%s' value must be an integer."),
     }
 
-    def __init__(self, *args, **kwargs):
+    def __init__(self, verbose_name=None, name=None, big=False, **kwargs):
         assert kwargs.get('primary_key', False) is True, \
                "%ss must have primary_key=True." % self.__class__.__name__
         kwargs['blank'] = True
-        Field.__init__(self, *args, **kwargs)
+        self.big = big
+        Field.__init__(self, verbose_name, name, **kwargs)
 
     def get_internal_type(self):
-        return "AutoField"
+        return "AutoField" if not self.big else 'BigAutoField'
+
+    def rel_db_type(self, connection):
+        db_type = 'IntegerField' if not self.big else 'BigIntegerField'
+        return self._internal_to_db_type(db_type, connection)
 
     def to_python(self, value):
         if value is None:
@@ -1152 +1166 @@
     def get_internal_type(self):
         return "PositiveIntegerField"
 
+    def rel_db_type(self, connection):
+        if connection.features.related_fields_match_type:
+            return self.db_type(connection)
+        return self._internal_to_db_type('IntegerField', connection)
+
     def formfield(self, **kwargs):
         defaults = {'min_value': 0}
         defaults.update(kwargs)
@@ -1163 +1182 @@
     def get_internal_type(self):
         return "PositiveSmallIntegerField"
 
+    def rel_db_type(self, connection):
+        if connection.features.related_fields_match_type:
+            return self.db_type(connection)
+        return self._internal_to_db_type('IntegerField', connection)
+
     def formfield(self, **kwargs):
         defaults = {'min_value': 0}
         defaults.update(kwargs)

django/db/models/fields/related.py

@@ -1113 +1113 @@
         return super(ForeignKey, self).formfield(**defaults)
 
     def db_type(self, connection):
-        # The database column type of a ForeignKey is the column type
-        # of the field to which it points. An exception is if the ForeignKey
-        # points to an AutoField/PositiveIntegerField/PositiveSmallIntegerField,
-        # in which case the column type is simply that of an IntegerField.
-        # If the database needs similar types for key fields however, the only
-        # thing we can do is making AutoField an IntegerField.
         rel_field = self.rel.get_related_field()
-        if (isinstance(rel_field, AutoField) or
-                (not connection.features.related_fields_match_type and
-                isinstance(rel_field, (PositiveIntegerField,
-                                       PositiveSmallIntegerField)))):
-            return IntegerField().db_type(connection=connection)
-        return rel_field.db_type(connection=connection)
+        return rel_field.rel_db_type(connection=connection)
 
 
 class OneToOneField(ForeignKey):

docs/ref/models/fields.txt

@@ -331 +331 @@
 ``AutoField``
 -------------
 
-.. class:: AutoField(**options)
+.. class:: AutoField([big=False, **options]
 
 An :class:`IntegerField` that automatically increments
 according to available IDs. You usually won't need to use this directly; a
 primary key field will automatically be added to your model if you don't specify
 otherwise. See :ref:`automatic-primary-key-fields`.
 
+.. attribute:: AutoField.big
+
+.. versionadded:: 1.5
+
+Optional.  Either ``False`` or ``True``.  Default is ``False``. Allow you
+to use bigint for storing field values. This extends values range up to
+max 64 bit integer (from 1 to 9223372036854775807).
+
+
 ``BigIntegerField``
 -------------------