Source code for apispec.ext.marshmallow.schema_resolver

from .common import resolve_schema_instance


[docs]class SchemaResolver: """Resolve marshmallow Schemas in OpenAPI components and translate to OpenAPI `schema objects <https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#schema-object>`_, `parameter objects <https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameter-object>`_ or `reference objects <https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#reference-object>`_. """ def __init__(self, openapi_version, converter): self.openapi_version = openapi_version self.converter = converter
[docs] def resolve_parameters(self, parameters): """Resolve marshmallow Schemas in a list of OpenAPI `Parameter Objects <https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#parameter-object>`_. Each parameter object that contains a Schema will be translated into one or more Parameter Objects. If the value of a `schema` key is marshmallow Schema class, instance or a string that resolves to a Schema Class each field in the Schema will be expanded as a separate Parameter Object. Example: :: #Input class UserSchema(Schema): name = fields.String() id = fields.Int() [ {"in": "query", "schema": "UserSchema"} ] #Output [ {"in": "query", "name": "id", "required": False, "schema": {"type": "integer", "format": "int32"}}, {"in": "query", "name": "name", "required": False, "schema": {"type": "string"}} ] If the Parameter Object contains a `content` key a single Parameter Object is returned with the Schema translated into a Schema Object or Reference Object. Example: :: #Input [{"in": "query", "name": "pet", "content":{"application/json": {"schema": "PetSchema"}} }] #Output [ { "in": "query", "name": "pet", "content": { "application/json": { "schema": {"$ref": "#/components/schemas/Pet"} } } } ] :param list parameters: the list of OpenAPI parameter objects to resolve. """ resolved = [] for parameter in parameters: if ( isinstance(parameter, dict) and not isinstance(parameter.get("schema", {}), dict) and "in" in parameter ): schema_instance = resolve_schema_instance(parameter.pop("schema")) resolved += self.converter.schema2parameters( schema_instance, default_in=parameter.pop("in"), **parameter ) else: self.resolve_schema(parameter) resolved.append(parameter) return resolved
[docs] def resolve_response(self, response): """Resolve marshmallow Schemas in OpenAPI `Response Objects <https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#responseObject>`_. Schemas may appear in either a Media Type Object or a Header Object. Example: :: #Input { "content": {"application/json": {"schema": "PetSchema"}}, "description": "successful operation", "headers": {"PetHeader": {"schema": "PetHeaderSchema"}}, } #Output { "content": { "application/json":{"schema": {"$ref": "#/components/schemas/Pet"}} }, "description": "successful operation", "headers": { "PetHeader": {"schema": {"$ref": "#/components/schemas/PetHeader"}} }, } :param dict response: the response object to resolve. """ self.resolve_schema(response) if "headers" in response: for header in response["headers"].values(): self.resolve_schema(header)
[docs] def resolve_schema(self, data): """Resolve marshmallow Schemas in an OpenAPI component or header - modifies the input dictionary to translate marshmallow Schemas to OpenAPI Schema Objects or Reference Objects. OpenAPIv3 Components: :: #Input { "description": "user to add to the system", "content": { "application/json": { "schema": "UserSchema" } } } #Output { "description": "user to add to the system", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/User" } } } } :param dict|str data: either a parameter or response dictionary that may contain a schema, or a reference provided as string """ if not isinstance(data, dict): return # OAS 2 component or OAS 3 header if "schema" in data: data["schema"] = self.resolve_schema_dict(data["schema"]) # OAS 3 component except header if self.openapi_version.major >= 3: if "content" in data: for content in data["content"].values(): if "schema" in content: content["schema"] = self.resolve_schema_dict(content["schema"])
[docs] def resolve_schema_dict(self, schema): """Resolve a marshmallow Schema class, object, or a string that resolves to a Schema class or an OpenAPI Schema Object containing one of the above to an OpenAPI Schema Object or Reference Object. If the input is a marshmallow Schema class, object or a string that resolves to a Schema class the Schema will be translated to an OpenAPI Schema Object or Reference Object. Example: :: #Input "PetSchema" #Output {"$ref": "#/components/schemas/Pet"} If the input is a dictionary representation of an OpenAPI Schema Object recursively search for a marshmallow Schemas to resolve. For `"type": "array"`, marshmallow Schemas may appear as the value of the `items` key. For `"type": "object"` Marshmalow Schemas may appear as values in the `properties` dictionary. Examples: :: #Input {"type": "array", "items": "PetSchema"} #Output {"type": "array", "items": {"$ref": "#/components/schemas/Pet"}} #Input {"type": "object", "properties": {"pet": "PetSchcema", "user": "UserSchema"}} #Output { "type": "object", "properties": { "pet": {"$ref": "#/components/schemas/Pet"}, "user": {"$ref": "#/components/schemas/User"} } } :param string|Schema|dict schema: the schema to resolve. """ if isinstance(schema, dict): if schema.get("type") == "array" and "items" in schema: schema["items"] = self.resolve_schema_dict(schema["items"]) if schema.get("type") == "object" and "properties" in schema: schema["properties"] = { k: self.resolve_schema_dict(v) for k, v in schema["properties"].items() } return schema return self.converter.resolve_nested_schema(schema)