Fixed #19635 -- Made fields pickleable

1 files changed, 0 insertions, 24 deletions

diff --git a/django/db/models/sql/where.py b/django/db/models/sql/where.py
index ced5325754..754e33292d 100644
--- a/django/db/models/sql/where.py
+++ b/django/db/models/sql/where.py
@@ -345,30 +345,6 @@ class Constraint(object):
     def __init__(self, alias, col, field):
         self.alias, self.col, self.field = alias, col, field
 
-    def __getstate__(self):
-        """Save the state of the Constraint for pickling.
-
-        Fields aren't necessarily pickleable, because they can have
-        callable default values. So, instead of pickling the field
-        store a reference so we can restore it manually
-        """
-        obj_dict = self.__dict__.copy()
-        if self.field:
-            obj_dict['model'] = self.field.model
-            obj_dict['field_name'] = self.field.name
-        del obj_dict['field']
-        return obj_dict
-
-    def __setstate__(self, data):
-        """Restore the constraint """
-        model = data.pop('model', None)
-        field_name = data.pop('field_name', None)
-        self.__dict__.update(data)
-        if model is not None:
-            self.field = model._meta.get_field(field_name)
-        else:
-            self.field = None
-
     def prepare(self, lookup_type, value):
         if self.field:
             return self.field.get_prep_lookup(lookup_type, value)