diff --git a/django/core/management/validation.py b/django/core/management/validation.py index e561483af0..1dc76205c8 100644 --- a/django/core/management/validation.py +++ b/django/core/management/validation.py @@ -68,7 +68,7 @@ def get_validation_errors(outfile, app=None): # fields, m2m fields, m2m related objects or related objects if f.rel: if f.rel.to not in models.get_models(): - e.add(opts, "'%s' has relation with model %s, which has not been installed" % (f.name, f.rel.to)) + e.add(opts, "'%s' has a relation with model %s, which has either not been installed or is abstract." % (f.name, f.rel.to)) # it is a string and we could not find the model it refers to # so skip the next section if isinstance(f.rel.to, (str, unicode)): @@ -105,7 +105,7 @@ def get_validation_errors(outfile, app=None): # existing fields, m2m fields, m2m related objects or related # objects if f.rel.to not in models.get_models(): - e.add(opts, "'%s' has m2m relation with model %s, which has not been installed" % (f.name, f.rel.to)) + e.add(opts, "'%s' has an m2m relation with model %s, which has either not been installed or is abstract." % (f.name, f.rel.to)) # it is a string and we could not find the model it refers to # so skip the next section if isinstance(f.rel.to, (str, unicode)): diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py index e2c78ef96b..c8577ba22b 100644 --- a/django/db/models/fields/related.py +++ b/django/db/models/fields/related.py @@ -646,6 +646,7 @@ class ForeignKey(RelatedField, Field): except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT assert isinstance(to, basestring), "%s(%r) is invalid. First parameter to ForeignKey must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT) else: + assert not to._meta.abstract, "%s cannot define a relation with abstract class %s" % (self.__class__.__name__, to._meta.object_name) to_field = to_field or to._meta.pk.name kwargs['verbose_name'] = kwargs.get('verbose_name', None) @@ -756,6 +757,11 @@ class OneToOneField(ForeignKey): class ManyToManyField(RelatedField, Field): def __init__(self, to, **kwargs): + try: + assert not to._meta.abstract, "%s cannot define a relation with abstract class %s" % (self.__class__.__name__, to._meta.object_name) + except AttributeError: # to._meta doesn't exist, so it must be RECURSIVE_RELATIONSHIP_CONSTANT + assert isinstance(to, basestring), "%s(%r) is invalid. First parameter to ManyToManyField must be either a model, a model name, or the string %r" % (self.__class__.__name__, to, RECURSIVE_RELATIONSHIP_CONSTANT) + kwargs['verbose_name'] = kwargs.get('verbose_name', None) kwargs['rel'] = ManyToManyRel(to, num_in_admin=kwargs.pop('num_in_admin', 0), diff --git a/tests/modeltests/invalid_models/models.py b/tests/modeltests/invalid_models/models.py index 470afff4fe..c450193d97 100644 --- a/tests/modeltests/invalid_models/models.py +++ b/tests/modeltests/invalid_models/models.py @@ -5,7 +5,7 @@ This example exists purely to point out errors in models. """ from django.db import models -model_errors = "" + class FieldErrors(models.Model): charfield = models.CharField() decimalfield = models.DecimalField() @@ -168,6 +168,15 @@ class RelationshipDoubleFK(models.Model): third = models.ForeignKey(Group, related_name="rel_to_set") date_added = models.DateTimeField() +class AbstractModel(models.Model): + name = models.CharField(max_length=10) + class Meta: + abstract = True + +class AbstractRelationModel(models.Model): + fk1 = models.ForeignKey('AbstractModel') + fk2 = models.ManyToManyField('AbstractModel') + model_errors = """invalid_models.fielderrors: "charfield": CharFields require a "max_length" attribute. invalid_models.fielderrors: "decimalfield": DecimalFields require a "decimal_places" attribute. invalid_models.fielderrors: "decimalfield": DecimalFields require a "max_digits" attribute. @@ -250,8 +259,8 @@ invalid_models.selfclashm2m: Accessor for m2m field 'm2m_4' clashes with related invalid_models.selfclashm2m: Accessor for m2m field 'm2m_4' clashes with related m2m field 'SelfClashM2M.selfclashm2m_set'. Add a related_name argument to the definition for 'm2m_4'. invalid_models.selfclashm2m: Reverse query name for m2m field 'm2m_3' clashes with field 'SelfClashM2M.selfclashm2m'. Add a related_name argument to the definition for 'm2m_3'. invalid_models.selfclashm2m: Reverse query name for m2m field 'm2m_4' clashes with field 'SelfClashM2M.selfclashm2m'. Add a related_name argument to the definition for 'm2m_4'. -invalid_models.missingrelations: 'rel2' has m2m relation with model Rel2, which has not been installed -invalid_models.missingrelations: 'rel1' has relation with model Rel1, which has not been installed +invalid_models.missingrelations: 'rel1' has a relation with model Rel1, which has either not been installed or is abstract. +invalid_models.missingrelations: 'rel2' has an m2m relation with model Rel2, which has either not been installed or is abstract. invalid_models.grouptwo: 'primary' has a manually-defined m2m relation through model Membership, which does not have foreign keys to Person and GroupTwo invalid_models.grouptwo: 'secondary' has a manually-defined m2m relation through model MembershipMissingFK, which does not have foreign keys to Group and GroupTwo invalid_models.missingmanualm2mmodel: 'missing_m2m' specifies an m2m relation through model MissingM2MModel, which has not been installed @@ -260,4 +269,6 @@ invalid_models.group: Intermediary model RelationshipDoubleFK has more than one invalid_models.personselfrefm2m: Many-to-many fields with intermediate tables cannot be symmetrical. invalid_models.personselfrefm2m: Intermediary model RelationshipTripleFK has more than two foreign keys to PersonSelfRefM2M, which is ambiguous and is not permitted. invalid_models.personselfrefm2mexplicit: Many-to-many fields with intermediate tables cannot be symmetrical. +invalid_models.abstractrelationmodel: 'fk1' has a relation with model AbstractModel, which has either not been installed or is abstract. +invalid_models.abstractrelationmodel: 'fk2' has an m2m relation with model AbstractModel, which has either not been installed or is abstract. """