def resolve_filter_field(self, auto_schema, model, filterset_class,
field_name, filter_field):
from django_filters import filters
unambiguous_mapping = {
filters.CharFilter: OpenApiTypes.STR,
filters.BooleanFilter: OpenApiTypes.BOOL,
filters.DateFilter: OpenApiTypes.DATE,
filters.DateTimeFilter: OpenApiTypes.DATETIME,
filters.IsoDateTimeFilter: OpenApiTypes.DATETIME,
filters.TimeFilter: OpenApiTypes.TIME,
filters.UUIDFilter: OpenApiTypes.UUID,
filters.DurationFilter: OpenApiTypes.DURATION,
filters.OrderingFilter: OpenApiTypes.STR,
filters.TimeRangeFilter: OpenApiTypes.TIME,
filters.DateFromToRangeFilter: OpenApiTypes.DATE,
filters.IsoDateTimeFromToRangeFilter: OpenApiTypes.DATETIME,
filters.DateTimeFromToRangeFilter: OpenApiTypes.DATETIME,
}
if has_override(filter_field, 'field'):
annotation = get_override(filter_field, 'field')
if is_basic_type(annotation):
schema = build_basic_type(annotation)
else:
schema = annotation
elif isinstance(filter_field, tuple(unambiguous_mapping)):
for cls in filter_field.__class__.__mro__:
if cls in unambiguous_mapping:
schema = build_basic_type(unambiguous_mapping[cls])
break
elif isinstance(filter_field,
(filters.NumberFilter, filters.NumericRangeFilter)):
# NumberField is underspecified by itself. try to find the
# type that makes the most sense or default to generic NUMBER
if filter_field.method:
schema = self._build_filter_method_type(
filterset_class, filter_field)
if schema['type'] not in ['integer', 'number']:
schema = build_basic_type(OpenApiTypes.NUMBER)
else:
model_field = self._get_model_field(filter_field, model)
if isinstance(model_field,
(models.IntegerField, models.AutoField)):
schema = build_basic_type(OpenApiTypes.INT)
elif isinstance(model_field, models.FloatField):
schema = build_basic_type(OpenApiTypes.FLOAT)
elif isinstance(model_field, models.DecimalField):
schema = build_basic_type(
OpenApiTypes.NUMBER) # TODO may be improved
else:
schema = build_basic_type(OpenApiTypes.NUMBER)
elif filter_field.method:
# try to make best effort on the given method
schema = self._build_filter_method_type(filterset_class,
filter_field)
else:
try:
# the last resort is to lookup the type via the model or queryset field.
# first search for the field in the model as this has the least amount of
# potential side effects. Only after that fails, attempt to call
# get_queryset() to check for potential query annotations.
model_field = self._get_model_field(filter_field, model)
if not isinstance(model_field, models.Field):
qs = auto_schema.view.get_queryset()
model_field = qs.query.annotations[
filter_field.field_name].field
schema = auto_schema._map_model_field(model_field,
direction=None)
except Exception as exc:
warn(
f'Exception raised while trying resolve model field for django-filter '
f'field "{field_name}". Defaulting to string (Exception: {exc})'
)
schema = build_basic_type(OpenApiTypes.STR)
# primary keys are usually non-editable (readOnly=True) and map_model_field correctly
# signals that attribute. however this does not apply in this context.
schema.pop('readOnly', None)
# enrich schema with additional info from filter_field
enum = schema.pop('enum', None)
if 'choices' in filter_field.extra:
enum = [c for c, _ in filter_field.extra['choices']]
if enum:
schema['enum'] = sorted(enum, key=str)
description = schema.pop('description', None)
if filter_field.extra.get('help_text', None):
description = filter_field.extra['help_text']
elif filter_field.label is not None:
description = filter_field.label
# parameter style variations based on filter base class
if isinstance(filter_field, filters.BaseCSVFilter):
schema = build_array_type(schema)
field_names = [field_name]
explode = False
style = 'form'
elif isinstance(filter_field, filters.MultipleChoiceFilter):
schema = build_array_type(schema)
field_names = [field_name]
explode = True
style = 'form'
elif isinstance(filter_field,
(filters.RangeFilter, filters.NumericRangeFilter)):
try:
suffixes = filter_field.field_class.widget.suffixes
except AttributeError:
suffixes = ['min', 'max']
field_names = [
f'{field_name}_{suffix}' if suffix else field_name
for suffix in suffixes
]
explode = None
style = None
else:
field_names = [field_name]
explode = None
style = None
return [
build_parameter_type(name=field_name,
required=filter_field.extra['required'],
location=OpenApiParameter.QUERY,
description=description,
schema=schema,
explode=explode,
style=style) for field_name in field_names
]
def _map_serializer_field(self, field, direction):
if has_override(field, 'field'):
override = get_override(field, 'field')
if is_basic_type(override):
return build_basic_type(override)
else:
return self._map_serializer_field(override, direction)
meta = self._get_serializer_field_meta(field)
serializer_field_extension = OpenApiSerializerFieldExtension.get_match(
field)
if serializer_field_extension:
schema = serializer_field_extension.map_serializer_field(
self, direction)
return append_meta(schema, meta)
# nested serializer
if isinstance(field, serializers.Serializer):
component = self.resolve_serializer(field, direction)
return append_meta(component.ref, meta) if component else None
# nested serializer with many=True gets automatically replaced with ListSerializer
if isinstance(field, serializers.ListSerializer):
if is_serializer(field.child):
component = self.resolve_serializer(field.child, direction)
return append_meta(build_array_type(component.ref),
meta) if component else None
else:
schema = self._map_serializer_field(field.child, direction)
return append_meta(build_array_type(schema), meta)
# Related fields.
if isinstance(field, serializers.ManyRelatedField):
schema = self._map_serializer_field(field.child_relation,
direction)
# remove hand-over initkwargs applying only to outer scope
schema.pop('description', None)
schema.pop('readOnly', None)
return append_meta(build_array_type(schema), meta)
if isinstance(field, serializers.PrimaryKeyRelatedField):
# read_only fields do not have a Manager by design. go around and get field
# from parent. also avoid calling Manager. __bool__ as it might be customized
# to hit the database.
if getattr(field, 'queryset', None) is not None:
model_field = field.queryset.model._meta.pk
else:
if isinstance(field.parent, serializers.ManyRelatedField):
model_field = field.parent.parent.Meta.model._meta.pk
else:
model_field = field.parent.Meta.model._meta.pk
# primary keys are usually non-editable (readOnly=True) and map_model_field correctly
# signals that attribute. however this does not apply in the context of relations.
schema = self._map_model_field(model_field, direction)
schema.pop('readOnly', None)
return append_meta(schema, meta)
if isinstance(field, serializers.StringRelatedField):
return append_meta(build_basic_type(OpenApiTypes.STR), meta)
if isinstance(field, serializers.SlugRelatedField):
return append_meta(build_basic_type(OpenApiTypes.STR), meta)
if isinstance(field, serializers.HyperlinkedIdentityField):
return append_meta(build_basic_type(OpenApiTypes.URI), meta)
if isinstance(field, serializers.HyperlinkedRelatedField):
return append_meta(build_basic_type(OpenApiTypes.URI), meta)
if isinstance(field, serializers.MultipleChoiceField):
return append_meta(build_array_type(build_choice_field(field)),
meta)
if isinstance(field, serializers.ChoiceField):
return append_meta(build_choice_field(field), meta)
if isinstance(field, serializers.ListField):
if isinstance(field.child, _UnvalidatedField):
return append_meta(build_array_type({}), meta)
elif is_serializer(field.child):
component = self.resolve_serializer(field.child, direction)
return append_meta(build_array_type(component.ref),
meta) if component else None
else:
schema = self._map_serializer_field(field.child, direction)
return append_meta(build_array_type(schema), meta)
# DateField and DateTimeField type is string
if isinstance(field, serializers.DateField):
return append_meta(build_basic_type(OpenApiTypes.DATE), meta)
if isinstance(field, serializers.DateTimeField):
return append_meta(build_basic_type(OpenApiTypes.DATETIME), meta)
if isinstance(field, serializers.TimeField):
return append_meta(build_basic_type(OpenApiTypes.TIME), meta)
if isinstance(field, serializers.EmailField):
return append_meta(build_basic_type(OpenApiTypes.EMAIL), meta)
if isinstance(field, serializers.URLField):
return append_meta(build_basic_type(OpenApiTypes.URI), meta)
if isinstance(field, serializers.UUIDField):
return append_meta(build_basic_type(OpenApiTypes.UUID), meta)
if isinstance(field, serializers.DurationField):
return append_meta(build_basic_type(OpenApiTypes.STR), meta)
if isinstance(field, serializers.IPAddressField):
# TODO this might be a DRF bug. protocol is not propagated to serializer although it
# should have been. results in always 'both' (thus no format)
if 'ipv4' == field.protocol.lower():
schema = build_basic_type(OpenApiTypes.IP4)
elif 'ipv6' == field.protocol.lower():
schema = build_basic_type(OpenApiTypes.IP6)
else:
schema = build_basic_type(OpenApiTypes.STR)
return append_meta(schema, meta)
# DecimalField has multipleOf based on decimal_places
if isinstance(field, serializers.DecimalField):
if getattr(field, 'coerce_to_string',
api_settings.COERCE_DECIMAL_TO_STRING):
content = {
**build_basic_type(OpenApiTypes.STR), 'format': 'decimal'
}
else:
content = build_basic_type(OpenApiTypes.DECIMAL)
if field.max_whole_digits:
content['maximum'] = int(field.max_whole_digits * '9') + 1
content['minimum'] = -content['maximum']
self._map_min_max(field, content)
return append_meta(content, meta)
if isinstance(field, serializers.FloatField):
content = build_basic_type(OpenApiTypes.FLOAT)
self._map_min_max(field, content)
return append_meta(content, meta)
if isinstance(field, serializers.IntegerField):
content = build_basic_type(OpenApiTypes.INT)
self._map_min_max(field, content)
# 2147483647 is max for int32_size, so we use int64 for format
if int(content.get('maximum', 0)) > 2147483647 or int(
content.get('minimum', 0)) > 2147483647:
content['format'] = 'int64'
return append_meta(content, meta)
if isinstance(field, serializers.FileField):
if spectacular_settings.COMPONENT_SPLIT_REQUEST and direction == 'request':
content = build_basic_type(OpenApiTypes.BINARY)
else:
use_url = getattr(field, 'use_url',
api_settings.UPLOADED_FILES_USE_URL)
content = build_basic_type(
OpenApiTypes.URI if use_url else OpenApiTypes.STR)
return append_meta(content, meta)
if isinstance(field, serializers.SerializerMethodField):
method = getattr(field.parent, field.method_name)
return append_meta(self._map_response_type_hint(method), meta)
if anyisinstance(
field,
[serializers.BooleanField, serializers.NullBooleanField]):
return append_meta(build_basic_type(OpenApiTypes.BOOL), meta)
if isinstance(field, serializers.JSONField):
return append_meta(build_basic_type(OpenApiTypes.OBJECT), meta)
if anyisinstance(field,
[serializers.DictField, serializers.HStoreField]):
content = build_basic_type(OpenApiTypes.OBJECT)
if not isinstance(field.child, _UnvalidatedField):
content['additionalProperties'] = self._map_serializer_field(
field.child, direction)
return append_meta(content, meta)
if isinstance(field, serializers.CharField):
return append_meta(build_basic_type(OpenApiTypes.STR), meta)
if isinstance(field, serializers.ReadOnlyField):
# direct source from the serializer
assert field.source_attrs, f'ReadOnlyField "{field}" needs a proper source'
target = follow_field_source(field.parent.Meta.model,
field.source_attrs)
if callable(target):
schema = self._map_response_type_hint(target)
elif isinstance(target, models.Field):
schema = self._map_model_field(target, direction)
else:
assert False, f'ReadOnlyField target "{field}" must be property or model field'
return append_meta(schema, meta)
# DRF was not able to match the model field to an explicit SerializerField and therefore
# used its generic fallback serializer field that simply wraps the model field.
if isinstance(field, serializers.ModelField):
schema = self._map_model_field(field.model_field, direction)
return append_meta(schema, meta)
warn(
f'could not resolve serializer field "{field}". defaulting to "string"'
)
return append_meta(build_basic_type(OpenApiTypes.STR), meta)
