Add array of array of values type.

dbarray/__init__.py

@@ -44,7 +44,22 @@ def run_validators(self, value):
         else:
             for v in value:
                 super(ArrayFieldBase, self).run_validators(v)
-
+
+
+class ArrayArrayFieldBase(ArrayFieldBase):
+    """Django field type for an array of array of values. Supported only on PostgreSQL.
+
+    This class is not meant to be instantiated directly; instead, field classes
+    should inherit from this class and from an appropriate Django model class.
+    """
+
+    _south_introspects = True
+
+    def db_type(self, connection):
+        require_postgres(connection)
+        return super(ArrayFieldBase, self).db_type(connection=connection) + '[][]'
+
+
 class ArrayFieldMetaclass(models.SubfieldBase):
     pass
 
@@ -53,6 +68,13 @@ def array_field_factory(name, fieldtype, module=ArrayFieldBase.__module__):
         {'__module__': module,
         'description': "An array, where each element is of the same type "\
         "as %s." % fieldtype.__name__})
+
+
+def array_array_field_factory(name, fieldtype, module=ArrayArrayFieldBase.__module__):
+    return ArrayFieldMetaclass(name, (ArrayArrayFieldBase, fieldtype),
+        {'__module__': module,
+        'description': "An array, where each element is of the same type "\
+        "as %s." % fieldtype.__name__})
 
 # If you want to make an array version of a field not covered below, this is
 # the easiest way:
@@ -64,5 +86,4 @@ def array_field_factory(name, fieldtype, module=ArrayFieldBase.__module__):
 FloatArrayField = array_field_factory('FloatArrayField', models.FloatField)
 CharArrayField = array_field_factory('CharArrayField', models.CharField)
 TextArrayField = array_field_factory('TextArrayField', models.TextField)
-
-
+TextArrayArrayField = array_array_field_factory('TextArrayArrayField', models.TextField)