def _check_fields(self, cls, model):
""" Check that `fields` only refer to existing fields, doesn't contain
duplicates. Check if at most one of `fields` and `fieldsets` is defined.
"""
if cls.fields is None:
return []
elif not isinstance(cls.fields, (list, tuple)):
return must_be('a list or tuple', option='fields', obj=cls, id='admin.E004')
elif cls.fieldsets:
return [
checks.Error(
"Both 'fieldsets' and 'fields' are specified.",
hint=None,
obj=cls,
id='admin.E005',
)
]
fields = flatten(cls.fields)
if len(fields) != len(set(fields)):
return [
checks.Error(
"The value of 'fields' contains duplicate field(s).",
hint=None,
obj=cls,
id='admin.E006',
)
]
return list(chain(*[
self._check_field_spec(cls, model, field_name, 'fields')
for field_name in cls.fields
]))
def _check_fieldsets_item(self, cls, model, fieldset, label):
""" Check an item of `fieldsets`, i.e. check that this is a pair of a
set name and a dictionary containing "fields" key. """
if not isinstance(fieldset, (list, tuple)):
return must_be('a list or tuple', option=label, obj=cls, id='admin.E008')
elif len(fieldset) != 2:
return must_be('of length 2', option=label, obj=cls, id='admin.E009')
elif not isinstance(fieldset[1], dict):
return must_be('a dictionary', option='%s[1]' % label, obj=cls, id='admin.E010')
elif 'fields' not in fieldset[1]:
return [
checks.Error(
"The value of '%s[1]' must contain the key 'fields'." % label,
hint=None,
obj=cls,
id='admin.E011',
)
]
elif not isinstance(fieldset[1]['fields'], (list, tuple)):
return must_be('a list or tuple', option="fieldsets[1]['fields']", obj=cls, id='admin.E008')
fields = flatten(fieldset[1]['fields'])
if len(fields) != len(set(fields)):
return [
checks.Error(
"There are duplicate field(s) in '%s[1]'." % label,
hint=None,
obj=cls,
id='admin.E012',
)
]
return list(chain(*[
self._check_field_spec(cls, model, fieldset_fields, '%s[1]["fields"]' % label)
for fieldset_fields in fieldset[1]['fields']
]))