def process_m2m(self, instance, field):
# check django's version number to determine how intermediary models
# are checked if they are auto created or not.
auto_created_through_model = False
through = get_remote_field(field).through
auto_created_through_model = through._meta.auto_created
if auto_created_through_model:
return self.process_field(instance, field, is_m2m=True)
# if m2m relation has intermediary model:
# * only generate relation if 'generate_m2m' is given
# * first generate intermediary model and assign a newly created
# related model to the foreignkey
kwargs = {}
if field.name in self.generate_m2m:
# get fk to related model on intermediary model
related_fks = [fk
for fk in through._meta.fields
if isinstance(fk, related.ForeignKey) and \
get_remote_field_to(fk) is get_remote_field_to(field)]
self_fks = [fk
for fk in through._meta.fields
if isinstance(fk, related.ForeignKey) and \
get_remote_field_to(fk) is self.model]
assert len(related_fks) == 1
assert len(self_fks) == 1
related_fk = related_fks[0]
self_fk = self_fks[0]
min_count, max_count = self.generate_m2m[field.name]
intermediary_model = generators.MultipleInstanceGenerator(
AutoFixture(through,
field_values={
self_fk.name:
instance,
related_fk.name:
generators.InstanceGenerator(
autofixture.get(
get_remote_field_to(field)))
}),
min_count=min_count,
max_count=max_count,
**kwargs).generate()
def process_m2m(self, instance, field):
# check django's version number to determine how intermediary models
# are checked if they are auto created or not.
auto_created_through_model = False
through = get_remote_field(field).through
auto_created_through_model = through._meta.auto_created
if auto_created_through_model:
return self.process_field(instance, field)
# if m2m relation has intermediary model:
# * only generate relation if 'generate_m2m' is given
# * first generate intermediary model and assign a newly created
# related model to the foreignkey
kwargs = {}
if field.name in self.generate_m2m:
# get fk to related model on intermediary model
related_fks = [fk
for fk in through._meta.fields
if isinstance(fk, related.ForeignKey) and \
get_remote_field_to(fk) is get_remote_field_to(field)]
self_fks = [fk
for fk in through._meta.fields
if isinstance(fk, related.ForeignKey) and \
get_remote_field_to(fk) is self.model]
assert len(related_fks) == 1
assert len(self_fks) == 1
related_fk = related_fks[0]
self_fk = self_fks[0]
min_count, max_count = self.generate_m2m[field.name]
intermediary_model = generators.MultipleInstanceGenerator(
AutoFixture(
through,
field_values={
self_fk.name: instance,
related_fk.name: generators.InstanceGenerator(
autofixture.get(get_remote_field_to(field)))
}),
min_count=min_count,
max_count=max_count,
**kwargs).generate()
def get_generator(self, field):
'''
Return a value generator based on the field instance that is passed to
this method. This function may return ``None`` which means that the
specified field will be ignored (e.g. if no matching generator was
found).
'''
if isinstance(field, fields.AutoField):
return None
if self.is_inheritance_parent(field):
return None
if (
field.default is not fields.NOT_PROVIDED and
not self.overwrite_defaults and
field.name not in self.field_values):
return None
kwargs = {}
if field.name in self.field_values:
value = self.field_values[field.name]
if isinstance(value, generators.Generator):
return value
elif isinstance(value, AutoFixture):
return generators.InstanceGenerator(autofixture=value)
elif callable(value):
return generators.CallableGenerator(value=value)
return generators.StaticGenerator(value=value)
if field.null:
kwargs['empty_p'] = self.none_p
if field.choices:
return generators.ChoicesGenerator(choices=field.choices, **kwargs)
if isinstance(field, related.ForeignKey):
# if generate_fk is set, follow_fk is ignored.
is_self_fk = (get_remote_field_to(field)().__class__ == self.model)
if field.name in self.generate_fk and not is_self_fk:
return generators.InstanceGenerator(
autofixture.get(
get_remote_field_to(field),
follow_fk=self.follow_fk.get_deep_links(field.name),
generate_fk=self.generate_fk.get_deep_links(field.name)),
limit_choices_to=get_remote_field(field).limit_choices_to)
if field.name in self.follow_fk:
selected = generators.InstanceSelector(
get_remote_field_to(field),
limit_choices_to=get_remote_field(field).limit_choices_to)
if selected.get_value() is not None:
return selected
if field.blank or field.null:
return generators.NoneGenerator()
if is_self_fk and not field.null:
raise CreateInstanceError(
u'Cannot resolve self referencing field "%s" to "%s" without null=True' % (
field.name,
'%s.%s' % (
get_remote_field_to(field)._meta.app_label,
get_remote_field_to(field)._meta.object_name,
)
))
raise CreateInstanceError(
u'Cannot resolve ForeignKey "%s" to "%s". Provide either '
u'"follow_fk" or "generate_fk" parameters.' % (
field.name,
'%s.%s' % (
get_remote_field_to(field)._meta.app_label,
get_remote_field_to(field)._meta.object_name,
)
))
if isinstance(field, related.ManyToManyField):
if field.name in self.generate_m2m:
min_count, max_count = self.generate_m2m[field.name]
return generators.MultipleInstanceGenerator(
autofixture.get(get_remote_field_to(field)),
limit_choices_to=get_remote_field(field).limit_choices_to,
min_count=min_count,
max_count=max_count,
**kwargs)
if field.name in self.follow_m2m:
min_count, max_count = self.follow_m2m[field.name]
return generators.InstanceSelector(
get_remote_field_to(field),
limit_choices_to=get_remote_field(field).limit_choices_to,
min_count=min_count,
max_count=max_count,
**kwargs)
if field.blank or field.null:
return generators.StaticGenerator([])
raise CreateInstanceError(
u'Cannot assign instances of "%s" to ManyToManyField "%s". '
u'Provide either "follow_m2m" or "generate_m2m" argument.' % (
'%s.%s' % (
get_remote_field_to(field)._meta.app_label,
get_remote_field_to(field)._meta.object_name,
),
field.name,
))
if isinstance(field, fields.FilePathField):
return generators.FilePathGenerator(
path=field.path, match=field.match, recursive=field.recursive,
max_length=field.max_length, **kwargs)
if isinstance(field, fields.CharField):
if isinstance(field, fields.SlugField):
generator = generators.SlugGenerator
elif isinstance(field, fields.EmailField):
return generators.EmailGenerator(
max_length=min(field.max_length, 30))
elif isinstance(field, fields.URLField):
return generators.URLGenerator(
max_length=min(field.max_length, 25))
elif field.max_length > 15:
return generators.LoremSentenceGenerator(
common=False,
max_length=field.max_length)
else:
generator = generators.StringGenerator
return generator(max_length=field.max_length)
if isinstance(field, fields.DecimalField):
return generators.DecimalGenerator(
decimal_places=field.decimal_places,
max_digits=field.max_digits)
if hasattr(fields, 'BigIntegerField'):
if isinstance(field, fields.BigIntegerField):
return generators.IntegerGenerator(
min_value=-field.MAX_BIGINT - 1,
max_value=field.MAX_BIGINT,
**kwargs)
if isinstance(field, ImageField):
return generators.ImageGenerator(storage=field.storage, **kwargs)
for field_class, generator in self.field_to_generator.items():
if isinstance(field, field_class):
return generator(**kwargs)
return None