#24264: foreign key constraint error migrating integer pk to CharField
----------------------------+-------------------------------------
Reporter: timgraham | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.8alpha1
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
----------------------------+-------------------------------------
Comment (by MarkusH):
This patch on stable/1.8.x (edbf6de7536f7a6c1e5df019a5e1947d2c9dadf8)
fixes the problem for me, but is more a band-aid than a valid fix:
{{{#!patch
diff --git a/django/db/models/options.py b/django/db/models/options.py
index fa97265..e64990d 100644
--- a/django/db/models/options.py
+++ b/django/db/models/options.py
@@ -687,7 +687,8 @@ class Options(object):
for f in fields_with_relations:
if not isinstance(f.rel.to, six.string_types):
# Set options_instance -> field
- related_objects_graph[f.rel.to._meta].append(f)
+ opts = f.rel.to._meta
+ related_objects_graph[opts.app_label,
opts.object_name].append(f)
for model in all_models:
# Set the relation_tree using the internal __dict__. In this
way
@@ -695,7 +696,8 @@ class Options(object):
# __dict__ takes precedence over a data descriptor (such as
# @cached_property). This means that the _meta._relation_tree
is
# only called if related_objects is not in __dict__.
- related_objects = related_objects_graph[model._meta]
+ opts = model._meta
+ related_objects = related_objects_graph[opts.app_label,
opts.object_name]
# If related_objects are empty, it makes sense to set
# EMPTY_RELATION_TREE. This will avoid allocating multiple
empty
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/24264#comment:3>
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