From f7c5488b07f682b509714dce4871618f40d82f0c Mon Sep 17 00:00:00 2001 From: Scott Baker Date: Thu, 6 Nov 2014 17:33:27 -0800 Subject: [PATCH] deal with migrations problem --- planetstack/core/models/plcorebase.py | 35 ++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/planetstack/core/models/plcorebase.py b/planetstack/core/models/plcorebase.py index 57025b4..e483a79 100644 --- a/planetstack/core/models/plcorebase.py +++ b/planetstack/core/models/plcorebase.py @@ -82,10 +82,43 @@ class DiffModelMixIn: def get_field_diff(self, field_name): return self.diff.get(field_name, None) -class PlCoreBase(models.Model, DiffModelMixIn): +class PlCoreBase(models.Model): # , DiffModelMixIn): objects = PlCoreBaseManager() deleted_objects = PlCoreBaseDeletionManager() + # ---- copy stuff from DiffModelMixin ---- + + # XXX Django fails miserably when trying to create initial migrations when + # DiffModelMixin is used. So, until we figure out what's wrong, + # just copied the guts of DiffModelMixIn here. + + @property + def _dict(self): + return model_to_dict(self, fields=[field.name for field in + self._meta.fields]) + + @property + def diff(self): + d1 = self._initial + d2 = self._dict + diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]] + return dict(diffs) + + @property + def has_changed(self): + return bool(self.diff) + + @property + def changed_fields(self): + return self.diff.keys() + + def has_field_changed(self, field_name): + return field_name in self.diff.keys() + + def get_field_diff(self, field_name): + return self.diff.get(field_name, None) + # ---- end copy stuff from DiffModelMixin ---- + # default values for created and updated are only there to keep evolution # from failing. created = models.DateTimeField(auto_now_add=True, default=timezone.now) -- 2.43.0