Prepare release 1.0.4

Closes #16.

.idea/inspectionProfiles/Project_Default.xml

@@ -54,7 +54,6 @@
       </option>
     </inspection_tool>
     <inspection_tool class="PyShadowingNamesInspection" enabled="false" level="WEAK WARNING" enabled_by_default="false" />
-    <inspection_tool class="PyUnresolvedReferencesInspection" enabled="false" level="WARNING" enabled_by_default="false" />
     <inspection_tool class="PyUnusedLocalInspection" enabled="false" level="WEAK WARNING" enabled_by_default="false">
       <option name="ignoreTupleUnpacking" value="true" />
       <option name="ignoreLambdaParameters" value="true" />

CONTRIBUTING.rst

@@ -77,7 +77,7 @@ You want to contribute some code? Great! Here are a few steps to get you started
 
 #. Push your branch and submit a pull request to the master branch on GitHub
 
-   Incomplete/Work In Progress pull requrests are encouraged, because they allow you to get feedback and help more
+   Incomplete/Work In Progress pull requests are encouraged, because they allow you to get feedback and help more
    easily.
 
 #. Your code must pass all the required travis jobs before it is merged. As of now, this includes running on

README.rst

@@ -5,7 +5,7 @@
 drf-yasg - Yet another Swagger generator
 ########################################
 
-|travis| |nbsp| |codecov|
+|travis| |nbsp| |codecov| |nbsp| |rtd-badge| |nbsp| |pypi-version|
 
 Generate **real** Swagger/OpenAPI 2.0 specifications from a Django Rest Framework API.
 
@@ -358,5 +358,13 @@ https://drf-yasg.readthedocs.io/en/latest/
    :target: https://codecov.io/gh/axnsan12/drf-yasg
    :alt: Codecov
 
+.. |pypi-version| image:: https://img.shields.io/pypi/v/drf-yasg.svg
+   :target: https://pypi.org/project/drf-yasg/
+   :alt: PyPI
+
+.. |rtd-badge| image:: https://img.shields.io/readthedocs/drf-yasg.svg
+   :target: https://drf-yasg.readthedocs.io/
+   :alt: ReadTheDocs
+
 .. |nbsp| unicode:: 0xA0
    :trim:

docs/changelog.rst

@@ -0,0 +1,26 @@
+#########
+Changelog
+#########
+
+
+*********
+**1.0.4**
+*********
+
+- **FIX:** fixed improper generation of YAML references
+- **FEATURE:** added ``query_serializer`` parameter to
+  :func:`@swagger_auto_schema <.swagger_auto_schema>` (:issue:`16`, :pr:`17`)
+
+*********
+**1.0.3**
+*********
+
+- **FIX:** fixed bug that caused schema views returned from cache to fail (:issue:`14`)
+- **FIX:** disabled automatic generation of response schemas for form operations to avoid confusing errors caused by
+  attempting to shove file parameters into Schema objects
+
+*********
+**1.0.2**
+*********
+
+- First published version

docs/conf.py

@@ -7,6 +7,9 @@ import os
 import sys
 
 import sphinx_rtd_theme
+from docutils import nodes, utils
+from docutils.parsers.rst import roles
+from docutils.parsers.rst.roles import set_classes
 from pkg_resources import get_distribution
 
 # -- General configuration ------------------------------------------------
@@ -193,6 +196,11 @@ nitpick_ignore = [
     ('py:obj', 'APIView'),
 ]
 
+# even though the package should be already installed, the sphinx build on RTD
+# for some reason needs the sources dir to be in the path in order for viewcode to work
+sys.path.insert(0, os.path.abspath('../src'))
+
+# activate the Django testproj to be able to succesfully import drf_yasg
 sys.path.insert(0, os.path.abspath('../testproj'))
 os.putenv('DJANGO_SETTINGS_MODULE', 'testproj.settings')
 
@@ -200,7 +208,47 @@ from django.conf import settings  # noqa: E402
 
 settings.configure()
 
+# instantiate a SchemaView in the views module to make it available to autodoc
 import drf_yasg.views  # noqa: E402
 
-# instantiate a SchemaView in the views module to make it available to autodoc
 drf_yasg.views.SchemaView = drf_yasg.views.get_schema_view(None)
+
+# custom interpreted role for linking to GitHub issues and pull requests
+# use as :issue:`14` or :pr:`17`
+gh_issue_uri = "https://github.com/axnsan12/drf-yasg/issues/%d"
+gh_pr_uri = "https://github.com/axnsan12/drf-yasg/pull/%d"
+
+
+def role_github_pull_request_or_issue(name, rawtext, text, lineno, inliner, options=None, content=None):
+    options = options or {}
+    content = content or []
+    try:
+        ghid = int(text)
+        if ghid <= 0:
+            raise ValueError
+    except ValueError:
+        msg = inliner.reporter.error(
+            'GitHub pull request or issue number must be a number greater than or equal to 1; '
+            '"%s" is invalid.' % text, line=lineno
+        )
+        prb = inliner.problematic(rawtext, rawtext, msg)
+        return [prb], [msg]
+        # Base URL mainly used by inliner.rfc_reference, so this is correct:
+
+    if name == 'pr':
+        ref = gh_pr_uri
+    elif name == 'issue':
+        ref = gh_issue_uri
+    else:
+        msg = inliner.reporter.error('unknown tag name for GitHub reference - "%s"' % name, line=lineno)
+        prb = inliner.problematic(rawtext, rawtext, msg)
+        return [prb], [msg]
+
+    ref = ref % ghid
+    set_classes(options)
+    node = nodes.reference(rawtext, '#' + utils.unescape(text), refuri=ref, **options)
+    return [node], []
+
+
+roles.register_local_role('pr', role_github_pull_request_or_issue)
+roles.register_local_role('issue', role_github_pull_request_or_issue)

docs/custom_spec.rst

@@ -50,9 +50,86 @@ is structured, starting from the root ``Swagger`` object.
    + ``operationId`` - should be unique across all operations
    + ``tags`` - used to group operations in the listing
 
-It is interesting to note that the main difference between ``Parameter`` and ``Schema`` is that Schemas can nest other
+It is interesting to note the main differences between :class:`.Parameter` and :class:`.Schema` objects:
-Schemas, while Parameters are "primitives" and cannot contain other Parameters. The only exception are ``body``
+
-Parameters, which can contain a Schema.
++----------------------------------------------------------+-----------------------------------------------------------+
+| :class:`.Schema`                                         | :class:`.Parameter`                                       |
++==========================================================+===========================================================+
+| Can nest other Schemas                                   | Cannot nest other Parameters |br|                         |
+|                                                          | Can only nest a Schema if the parameter is ``in: body``   |
++----------------------------------------------------------+-----------------------------------------------------------+
+| Cannot describe file uploads |br|                        | Can describe file uploads via ``type`` = ``file``, |br|   |
+| - ``file`` is not permitted as a value for ``type``      | but only as part of a form :class:`.Operation` [#formop]_ |
++----------------------------------------------------------+-----------------------------------------------------------+
+| Can be used in :class:`.Response`\ s                     | Cannot be used in :class:`.Response`\ s                   |
++----------------------------------------------------------+-----------------------------------------------------------+
+| Cannot be used in form :class:`.Operation`\ s [#formop]_ | Can be used in form :class:`.Operation`\ s [#formop]_     |
++----------------------------------------------------------+-----------------------------------------------------------+
+| Can only describe request or response bodies             | Can describe ``query``, ``form``, ``header`` or ``path``  |
+|                                                          | parameters                                                |
++----------------------------------------------------------+-----------------------------------------------------------+
+
+.. [#formop] a form Operation is an :class:`.Operation` that consumes ``multipart/form-data`` or
+   ``application/x-www-form-urlencoded`` content
+
+      * a form Operation cannot have ``body`` parameters
+      * a non-form operation cannot have ``form`` parameters
+
+****************
+Default behavior
+****************
+
+This section describes where information is sourced from when using the default generation process.
+
+* :class:`.Paths` are generated by exploring the patterns registered in your default ``urlconf``, or the ``patterns``
+  and ``urlconf`` you specified when constructing :class:`.OpenAPISchemaGenerator`; only views inheriting from Django
+  Rest Framework's ``APIView`` are looked at, all other views are ignored
+* ``path`` :class:`.Parameter`\ s are generated by looking in the URL pattern for any template parameters; attempts are
+  made to guess their type from the views ``queryset`` and ``lookup_field``, if applicable. You can override path
+  parameters via ``manual_parameters`` in :ref:`@swagger_auto_schema <custom-spec-swagger-auto-schema>`.
+* ``query`` :class:`.Parameter`\ s - i.e. parameters specified in the URL as ``/path/?query1=value&query2=value`` -
+  are generated from your view's ``filter_backends`` and ``paginator``, if any are declared. Additional parameters can
+  be specified via the ``query_serializer`` and ``manual_parameters`` arguments of
+  :ref:`@swagger_auto_schema <custom-spec-swagger-auto-schema>`
+* The request body is only generated for the HTTP ``POST``, ``PUT`` and ``PATCH`` methods, and is sourced from the
+  view's ``serializer_class``. You can also override the request body using the ``request_body`` argument of
+  :ref:`@swagger_auto_schema <custom-spec-swagger-auto-schema>`.
+
+   - if the view represents a form request (that is, all its parsers are of the ``multipart/form-data`` or
+     ``application/x-www-form-urlencoded`` media types), the request body will be output as ``form``
+     :class:`.Parameter`\ s
+   - if it is not a form request, the request body will be output as a single ``body`` :class:`.Parameter` wrapped
+     around a :class:`.Schema`
+
+* ``header`` :class:`.Parameter`\ s are supported by the OpenAPI specification but are never generated by this library;
+  you can still add them using ``manual_parameters``.
+* :class:`.Responses` are generated as follows:
+
+   + if ``responses`` is provided to :ref:`@swagger_auto_schema <custom-spec-swagger-auto-schema>` and contains at least
+     one success status code (i.e. any `2xx` status code), no automatic response is generated and the given response
+     is used as described in the :func:`@swagger_auto_schema documentation <.swagger_auto_schema>`
+   + otherwise, an attempt is made to generate a default response:
+
+      - the success status code is assumed to be ``204` for ``DELETE`` requests, ``201`` for ``POST`` requests, and
+        ``200`` for all other request methods
+      - if the view has a request body, the same ``Serializer`` or :class:`.Schema` as in the request body is used
+        in generating the :class:`.Response` schema; this is inline with the default ``GenericAPIView`` and
+        ``GenericViewSet`` behavior
+      - if the view has no request body, its ``serializer_class`` is used to generate the :class:`.Response` schema
+      - if the view is a list view (as defined by :func:`.is_list_view`), the response schema is wrapped in an array
+      - if the view is also paginated, the response schema is then wrapped in the appropriate paging response structure
+      - the description of the response is left blank
+
+* :class:`.Response` headers are supported by the OpenAPI specification but not currently supported by this library;
+  you can still add them manually by providing an `appropriately structured dictionary
+  <https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md#headersObject>`_
+  to the ``headers`` property of a :class:`.Response` object
+* *descriptions* for :class:`.Operation`\ s, :class:`.Parameter`\ s and :class:`.Schema`\ s are picked up from
+  docstrings and ``help_text`` attributes in the same manner as the `default DRF SchemaGenerator
+  <http://www.django-rest-framework.org/api-guide/schemas/#schemas-as-documentation>`_
+
+
+.. _custom-spec-swagger-auto-schema:
 
 **************************************
 The ``@swagger_auto_schema`` decorator

docs/drf_yasg.rst

@@ -57,6 +57,7 @@ drf\_yasg\.openapi
     :members:
     :undoc-members:
     :show-inheritance:
+    :exclude-members: _bare_SwaggerDict
 
 drf\_yasg\.renderers
 ------------------------------

docs/index.rst

@@ -17,6 +17,7 @@ drf-yasg
    settings.rst
    contributing.rst
    license.rst
+   changelog.rst
 
 Source code documentation
 =========================

setup.py

@@ -3,6 +3,7 @@
 import io
 import os
 
+import sys
 from setuptools import setup, find_packages
 import distutils.core
 
@@ -21,23 +22,24 @@ def _install_setup_requires(attrs):
         dist.fetch_build_eggs(dist.setup_requires)
 
 
-try:
+if 'sdist' in sys.argv:
-    # try to install setuptools_scm before setuptools does it, otherwise our monkey patch below will come too early
+    try:
-    # (setuptools_scm adds find_files hooks into setuptools on install)
+        # try to install setuptools_scm before setuptools does it, otherwise our monkey patch below will come too early
-    _install_setup_requires({'setup_requires': requirements_setup})
+        # (setuptools_scm adds find_files hooks into setuptools on install)
-except Exception:
+        _install_setup_requires({'setup_requires': requirements_setup})
-    pass
+    except Exception:
+        pass
 
-try:
+    try:
-    # see https://github.com/pypa/setuptools_scm/issues/190, setuptools_scm includes ALL versioned files from the git
+        # see https://github.com/pypa/setuptools_scm/issues/190, setuptools_scm includes ALL versioned files from
-    # repo into the sdist by default, and there is no easy way to provide an opt-out;
+        # the git repo into the sdist by default, and there is no easy way to provide an opt-out;
-    # this hack is ugly but does the job; because this is not really a documented interface of the module,
+        # this hack is ugly but does the job; because this is not really a documented interface of the module,
-    # the setuptools_scm version should remain pinned to ensure it keeps working
+        # the setuptools_scm version should remain pinned to ensure it keeps working
-    import setuptools_scm.integration
+        import setuptools_scm.integration
 
-    setuptools_scm.integration.find_files = lambda _: []
+        setuptools_scm.integration.find_files = lambda _: []
-except ImportError:
+    except ImportError:
-    pass
+        pass
 
 
 def read_req(req_file):

src/drf_yasg/codecs.py

@@ -87,7 +87,7 @@ class _OpenAPICodec(object):
         :rtype: OrderedDict
         """
         swagger.security_definitions = swagger_settings.SECURITY_DEFINITIONS
-        return swagger
+        return swagger.as_odict()
 
 
 class OpenAPICodecJson(_OpenAPICodec):
@@ -101,6 +101,10 @@ class OpenAPICodecJson(_OpenAPICodec):
 class SaneYamlDumper(yaml.SafeDumper):
     """YamlDumper class usable for dumping ``OrderedDict`` and list instances in a standard way."""
 
+    def ignore_aliases(self, data):
+        """Disable YAML references."""
+        return True
+
     def increase_indent(self, flow=False, indentless=False, **kwargs):
         """https://stackoverflow.com/a/39681672
 
@@ -146,9 +150,25 @@ SaneYamlDumper.add_representer(OrderedDict, SaneYamlDumper.represent_odict)
 SaneYamlDumper.add_multi_representer(OrderedDict, SaneYamlDumper.represent_odict)
 
 
+def yaml_sane_dump(data, binary):
+    """Dump the given data dictionary into a sane format:
+
+        * OrderedDicts are dumped as regular mappings instead of non-standard !!odict
+        * multi-line mapping style instead of json-like inline style
+        * list elements are indented into their parents
+        * YAML references/aliases are disabled
+
+    :param dict data: the data to be serializers
+    :param bool binary: True to return a utf-8 encoded binary object, False to return a string
+    :return: the serialized YAML
+    :rtype: str,bytes
+    """
+    return yaml.dump(data, Dumper=SaneYamlDumper, default_flow_style=False, encoding='utf-8' if binary else None)
+
+
 class OpenAPICodecYaml(_OpenAPICodec):
     media_type = 'application/yaml'
 
     def _dump_dict(self, spec):
         """Dump ``spec`` into YAML."""
-        return yaml.dump(spec, Dumper=SaneYamlDumper, default_flow_style=False, encoding='utf-8')
+        return yaml_sane_dump(spec, binary=True)

src/drf_yasg/inspectors.py

@@ -10,7 +10,7 @@ from rest_framework.viewsets import GenericViewSet
 
 from . import openapi
 from .errors import SwaggerGenerationError
-from .utils import serializer_field_to_swagger, no_body, is_list_view
+from .utils import serializer_field_to_swagger, no_body, is_list_view, param_list_to_odict
 
 
 def force_serializer_instance(serializer):
@@ -30,6 +30,8 @@ def force_serializer_instance(serializer):
 
 
 class SwaggerAutoSchema(object):
+    body_methods = ('PUT', 'PATCH', 'POST')  #: methods allowed to have a request body
+
     def __init__(self, view, path, method, overrides, components):
         """Inspector class responsible for providing :class:`.Operation` definitions given a
 
@@ -88,10 +90,6 @@ class SwaggerAutoSchema(object):
         :return: a (potentially empty) list of :class:`.Parameter`\ s either ``in: body`` or ``in: formData``
         :rtype: list[openapi.Parameter]
         """
-        # only PUT, PATCH or POST can have a request body
-        if self.method not in ('PUT', 'PATCH', 'POST'):
-            return []
-
         serializer = self.get_request_serializer()
         schema = None
         if serializer is None:
@@ -109,6 +107,15 @@ class SwaggerAutoSchema(object):
                 schema = self.get_request_body_schema(serializer)
             return [self.make_body_parameter(schema)]
 
+    def get_view_serializer(self):
+        """Return the serializer as defined by the view's ``get_serializer()`` method.
+
+        :return: the view's ``Serializer``
+        """
+        if not hasattr(self.view, 'get_serializer'):
+            return None
+        return self.view.get_serializer()
+
     def get_request_serializer(self):
         """Return the request serializer (used for parsing the request payload) for this endpoint.
 
@@ -119,13 +126,16 @@ class SwaggerAutoSchema(object):
         if body_override is not None:
             if body_override is no_body:
                 return None
+            if self.method not in self.body_methods:
+                raise SwaggerGenerationError("request_body can only be applied to PUT, PATCH or POST views; "
+                                             "are you looking for query_serializer or manual_parameters?")
             if isinstance(body_override, openapi.Schema.OR_REF):
                 return body_override
             return force_serializer_instance(body_override)
-        else:
+        elif self.method in self.body_methods:
-            if not hasattr(self.view, 'get_serializer'):
+            return self.get_view_serializer()
-                return None
+
-            return self.view.get_serializer()
+        return None
 
     def get_request_form_parameters(self, serializer):
         """Given a Serializer, return a list of ``in: formData`` :class:`.Parameter`\ s.
@@ -133,12 +143,7 @@ class SwaggerAutoSchema(object):
         :param serializer: the view's request serializer as returned by :meth:`.get_request_serializer`
         :rtype: list[openapi.Parameter]
         """
-        fields = getattr(serializer, 'fields', {})
+        return self.serializer_to_parameters(serializer, in_=openapi.IN_FORM)
-        return [
-            self.field_to_parameter(value, key, openapi.IN_FORM)
-            for key, value
-            in fields.items()
-        ]
 
     def get_request_body_schema(self, serializer):
         """Return the :class:`.Schema` for a given request's body data. Only applies to PUT, PATCH and POST requests.
@@ -163,7 +168,7 @@ class SwaggerAutoSchema(object):
         :return: modified parameters
         :rtype: list[openapi.Parameter]
         """
-        parameters = OrderedDict(((param.name, param.in_), param) for param in parameters)
+        parameters = param_list_to_odict(parameters)
         manual_parameters = self.overrides.get('manual_parameters', None) or []
 
         if any(param.in_ == openapi.IN_BODY for param in manual_parameters):  # pragma: no cover
@@ -173,7 +178,7 @@ class SwaggerAutoSchema(object):
                 raise SwaggerGenerationError("cannot add form parameters when the request has a request schema; "
                                              "did you forget to set an appropriate parser class on the view?")
 
-        parameters.update(((param.name, param.in_), param) for param in manual_parameters)
+        parameters.update(param_list_to_odict(manual_parameters))
         return list(parameters.values())
 
     def get_responses(self):
@@ -218,13 +223,15 @@ class SwaggerAutoSchema(object):
         default_schema = ''
         if method == 'post':
             default_status = status.HTTP_201_CREATED
-            default_schema = self.get_request_serializer()
+            default_schema = self.get_request_serializer() or self.get_view_serializer()
         elif method == 'delete':
             default_status = status.HTTP_204_NO_CONTENT
         elif method in ('get', 'put', 'patch'):
-            default_schema = self.get_request_serializer()
+            default_schema = self.get_request_serializer() or self.get_view_serializer()
 
         default_schema = default_schema or ''
+        if any(is_form_media_type(encoding) for encoding in self.get_consumes()):
+            default_schema = ''
         if default_schema:
             if not isinstance(default_schema, openapi.Schema):
                 default_schema = self.serializer_to_schema(default_schema)
@@ -288,12 +295,35 @@ class SwaggerAutoSchema(object):
 
         return responses
 
+    def get_query_serializer(self):
+        """Return the query serializer (used for parsing query parameters) for this endpoint.
+
+        :return: the query serializer, or ``None``
+        """
+        query_serializer = self.overrides.get('query_serializer', None)
+        if query_serializer is not None:
+            query_serializer = force_serializer_instance(query_serializer)
+        return query_serializer
+
     def get_query_parameters(self):
         """Return the query parameters accepted by this view.
 
         :rtype: list[openapi.Parameter]
         """
-        return self.get_filter_parameters() + self.get_pagination_parameters()
+        natural_parameters = self.get_filter_parameters() + self.get_pagination_parameters()
+
+        query_serializer = self.get_query_serializer()
+        serializer_parameters = []
+        if query_serializer is not None:
+            serializer_parameters = self.serializer_to_parameters(query_serializer, in_=openapi.IN_QUERY)
+
+            if len(set(param_list_to_odict(natural_parameters)) & set(param_list_to_odict(serializer_parameters))) != 0:
+                raise SwaggerGenerationError(
+                    "your query_serializer contains fields that conflict with the "
+                    "filter_backend or paginator_class on the view - %s %s" % (self.method, self.path)
+                )
+
+        return natural_parameters + serializer_parameters
 
     def should_filter(self):
         """Determine whether filter backend parameters should be included for this request.
@@ -398,12 +428,26 @@ class SwaggerAutoSchema(object):
     def serializer_to_schema(self, serializer):
         """Convert a DRF Serializer instance to an :class:`.openapi.Schema`.
 
-        :param serializers.BaseSerializer serializer:
+        :param serializers.BaseSerializer serializer: the ``Serializer`` instance
         :rtype: openapi.Schema
         """
         definitions = self.components.with_scope(openapi.SCHEMA_DEFINITIONS)
         return serializer_field_to_swagger(serializer, openapi.Schema, definitions)
 
+    def serializer_to_parameters(self, serializer, in_):
+        """Convert a DRF serializer into a list of :class:`.Parameter`\ s using :meth:`.field_to_parameter`
+
+        :param serializers.BaseSerializer serializer: the ``Serializer`` instance
+        :param str in_: the location of the parameters, one of the `openapi.IN_*` constants
+        :rtype: list[openapi.Parameter]
+        """
+        fields = getattr(serializer, 'fields', {})
+        return [
+            self.field_to_parameter(value, key, in_)
+            for key, value
+            in fields.items()
+        ]
+
     def field_to_parameter(self, field, name, in_):
         """Convert a DRF serializer Field to a swagger :class:`.Parameter` object.
 

src/drf_yasg/openapi.py

@@ -1,4 +1,3 @@
-import copy
 from collections import OrderedDict
 
 from coreapi.compat import urlparse
@@ -48,8 +47,8 @@ def make_swagger_name(attribute_name):
     Convert a python variable name into a Swagger spec attribute name.
 
     In particular,
-     * if name starts with x\_, return "x-{camelCase}"
+     * if name starts with ``x_``, return ``x-{camelCase}``
-     * if name is 'ref', return "$ref"
+     * if name is ``ref``, return ``$ref``
      * else return the name converted to camelCase, with trailing underscores stripped
 
     :param str attribute_name: python attribute name
@@ -62,9 +61,19 @@ def make_swagger_name(attribute_name):
     return camelize(attribute_name.rstrip('_'), uppercase_first_letter=False)
 
 
+def _bare_SwaggerDict(cls):
+    assert issubclass(cls, SwaggerDict)
+    result = cls.__new__(cls)
+    OrderedDict.__init__(result)  # no __init__ called for SwaggerDict subclasses!
+    return result
+
+
 class SwaggerDict(OrderedDict):
     """A particular type of OrderedDict, which maps all attribute accesses to dict lookups using
-     :func:`.make_swagger_name`.  Used as a base class for all Swagger helper models.
+     :func:`.make_swagger_name`. Attribute names starting with ``_`` are set on the object as-is and are not included
+     in the specification output.
+
+     Used as a base class for all Swagger helper models.
     """
 
     def __init__(self, **attrs):
@@ -105,11 +114,34 @@ class SwaggerDict(OrderedDict):
         for attr, val in self._extras__.items():
             setattr(self, attr, val)
 
-    # noinspection PyArgumentList,PyDefaultArgument
+    @staticmethod
-    def __deepcopy__(self, memodict={}):
+    def _as_odict(obj, memo):
-        result = OrderedDict(list(self.items()))
+        """Implementation detail of :meth:`.as_odict`"""
-        result.update(copy.deepcopy(result, memodict))
+        if id(obj) in memo:
-        return result
+            return memo[id(obj)]
+
+        if isinstance(obj, dict):
+            result = OrderedDict()
+            memo[id(obj)] = result
+            for attr, val in obj.items():
+                result[attr] = SwaggerDict._as_odict(val, memo)
+            return result
+        elif isinstance(obj, (list, tuple)):
+            return type(obj)(SwaggerDict._as_odict(elem, memo) for elem in obj)
+
+        return obj
+
+    def as_odict(self):
+        """Convert this object into an ``OrderedDict`` instance.
+
+        :rtype: OrderedDict
+        """
+        return SwaggerDict._as_odict(self, {})
+
+    def __reduce__(self):
+        # for pickle supprt; this skips calls to all SwaggerDict __init__ methods and relies
+        # on the already set attributes instead
+        return _bare_SwaggerDict, (type(self),), vars(self), None, iter(self.items())
 
 
 class Contact(SwaggerDict):

src/drf_yasg/utils.py

@@ -45,8 +45,8 @@ def is_list_view(path, method, view):
     return True
 
 
-def swagger_auto_schema(method=None, methods=None, auto_schema=None, request_body=None, manual_parameters=None,
+def swagger_auto_schema(method=None, methods=None, auto_schema=None, request_body=None, query_serializer=None,
-                        operation_description=None, responses=None):
+                        manual_parameters=None, operation_description=None, responses=None):
     """Decorate a view method to customize the :class:`.Operation` object generated from it.
 
     `method` and `methods` are mutually exclusive and must only be present when decorating a view method that accepts
@@ -67,6 +67,15 @@ def swagger_auto_schema(method=None, methods=None, auto_schema=None, request_bod
         If a ``Serializer`` class or instance is given, it will be automatically converted into a :class:`.Schema`
         used as a ``body`` :class:`.Parameter`, or into a list of  ``form`` :class:`.Parameter`\ s, as appropriate.
 
+    :param .Serializer query_serializer: if you use a ``Serializer`` to parse query parameters, you can pass it here
+        and have :class:`.Parameter` objects be generated automatically from it.
+
+        If any ``Field`` on the serializer cannot be represented as a ``query`` :class:`.Parameter`
+        (e.g. nested Serializers, file fields, ...), the schema generation will fail with an error.
+
+        Schema generation will also fail if the name of any Field on the `query_serializer` conflicts with parameters
+        generated by ``filter_backends`` or ``paginator``.
+
     :param list[.Parameter] manual_parameters: a list of manual parameters to override the automatically generated ones
 
         :class:`.Parameter`\ s are identified by their (``name``, ``in``) combination, and any parameters given
@@ -94,14 +103,16 @@ def swagger_auto_schema(method=None, methods=None, auto_schema=None, request_bod
         data = {
             'auto_schema': auto_schema,
             'request_body': request_body,
+            'query_serializer': query_serializer,
             'manual_parameters': manual_parameters,
             'operation_description': operation_description,
             'responses': responses,
         }
         data = {k: v for k, v in data.items() if v is not None}
 
+        # if the method is a detail_route or list_route, it will have a bind_to_methods attribute
         bind_to_methods = getattr(view_method, 'bind_to_methods', [])
-        # if the method is actually a function based view
+        # if the method is actually a function based view (@api_view), it will have a 'cls' attribute
         view_cls = getattr(view_method, 'cls', None)
         http_method_names = getattr(view_cls, 'http_method_names', [])
         if bind_to_methods or http_method_names:
@@ -121,11 +132,12 @@ def swagger_auto_schema(method=None, methods=None, auto_schema=None, request_bod
                     "on multi-method %s, you must specify swagger_auto_schema on a per-method basis " \
                     "using one of the `method` or `methods` arguments" % _route
                 assert bool(methods) != bool(method), "specify either method or methods"
+                assert not isinstance(methods, str), "`methods` expects to receive a list of methods;" \
+                                                     " use `method` for a single argument"
                 if method:
                     _methods = [method.lower()]
                 else:
                     _methods = [mth.lower() for mth in methods]
-                assert not isinstance(_methods, str), "`methods` expects to receive; use `method` for a single arg"
                 assert not any(mth in existing_data for mth in _methods), "method defined multiple times"
                 assert all(mth in available_methods for mth in _methods), "method not bound to %s" % _route
 
@@ -134,7 +146,7 @@ def swagger_auto_schema(method=None, methods=None, auto_schema=None, request_bod
                 existing_data[available_methods[0]] = data
             view_method.swagger_auto_schema = existing_data
         else:
-            assert methods is None, \
+            assert method is None and methods is None, \
                 "the methods argument should only be specified when decorating a detail_route or list_route; you " \
                 "should also ensure that you put the swagger_auto_schema decorator AFTER (above) the _route decorator"
             view_method.swagger_auto_schema = data
@@ -274,9 +286,13 @@ def serializer_field_to_swagger(field, swagger_object_type, definitions=None, **
     elif isinstance(field, serializers.FileField):
         # swagger 2.0 does not support specifics about file fields, so ImageFile gets no special treatment
         # OpenAPI 3.0 does support it, so a future implementation could handle this better
+        err = SwaggerGenerationError("parameter of type file is supported only in a formData Parameter")
         if swagger_object_type != openapi.Parameter:
-            raise SwaggerGenerationError("parameter of type file is supported only in formData Parameter")
+            raise err  # pragma: no cover
-        return SwaggerType(type=openapi.TYPE_FILE)
+        param = SwaggerType(type=openapi.TYPE_FILE)
+        if param['in'] != openapi.IN_FORM:
+            raise err  # pragma: no cover
+        return param
     elif isinstance(field, serializers.DictField) and swagger_object_type == openapi.Schema:
         child_schema = serializer_field_to_swagger(field.child, ChildSwaggerType, definitions)
         return SwaggerType(
@@ -307,3 +323,18 @@ def find_regex(regex_field):
 
     # regex_validator.regex should be a compiled re object...
     return getattr(getattr(regex_validator, 'regex', None), 'pattern', None)
+
+
+def param_list_to_odict(parameters):
+    """Transform a list of :class:`.Parameter` objects into an ``OrderedDict`` keyed on the ``(name, in_)`` tuple of
+    each parameter.
+
+    Raises an ``AssertionError`` if `parameters` contains duplicate parameters (by their name + in combination).
+
+    :param list[.Parameter] parameters: the list of parameters
+    :return: `parameters` keyed by ``(name, in_)``
+    :rtype: dict[tuple(str,str),.Parameter]
+    """
+    result = OrderedDict(((param.name, param.in_), param) for param in parameters)
+    assert len(result) == len(parameters), "duplicate Parameters found"
+    return result

testproj/articles/views.py

@@ -54,7 +54,7 @@ class ArticleViewSet(viewsets.ModelViewSet):
         return Response(serializer.data)
 
     @swagger_auto_schema(method='get', operation_description="image GET description override")
-    @swagger_auto_schema(method='post', request_body=serializers.ImageUploadSerializer, responses={200: 'success'})
+    @swagger_auto_schema(method='post', request_body=serializers.ImageUploadSerializer)
     @detail_route(methods=['get', 'post'], parser_classes=(MultiPartParser,))
     def image(self, request, slug=None):
         """

testproj/testproj/urls.py

@@ -29,7 +29,10 @@ def plain_view(request):
 urlpatterns = [
     url(r'^swagger(?P<format>.json|.yaml)$', schema_view.without_ui(cache_timeout=0), name='schema-json'),
     url(r'^swagger/$', schema_view.with_ui('swagger', cache_timeout=0), name='schema-swagger-ui'),
-    url(r'^redoc/$', schema_view.with_ui('redoc', cache_timeout=None), name='schema-redoc'),
+    url(r'^redoc/$', schema_view.with_ui('redoc', cache_timeout=0), name='schema-redoc'),
+    url(r'^cached/swagger(?P<format>.json|.yaml)$', schema_view.without_ui(cache_timeout=None), name='schema-json'),
+    url(r'^cached/swagger/$', schema_view.with_ui('swagger', cache_timeout=None), name='schema-swagger-ui'),
+    url(r'^cached/redoc/$', schema_view.with_ui('redoc', cache_timeout=None), name='schema-redoc'),
 
     url(r'^admin/', admin.site.urls),
     url(r'^snippets/', include('snippets.urls')),

testproj/users/serializers.py

@@ -12,3 +12,8 @@ class UserSerializerrr(serializers.ModelSerializer):
     class Meta:
         model = User
         fields = ('id', 'username', 'email', 'snippets', 'last_connected_ip', 'last_connected_at')
+
+
+class UserListQuerySerializer(serializers.Serializer):
+    username = serializers.CharField(help_text="this field is generated from a query_serializer")
+    is_staff = serializers.BooleanField(help_text="this one too!")

testproj/users/views.py

@@ -7,13 +7,13 @@ from rest_framework.views import APIView
 
 from drf_yasg import openapi
 from drf_yasg.utils import swagger_auto_schema, no_body
-from users.serializers import UserSerializerrr
+from users.serializers import UserSerializerrr, UserListQuerySerializer
 
 
 class UserList(APIView):
     """UserList cbv classdoc"""
 
-    @swagger_auto_schema(responses={200: UserSerializerrr(many=True)})
+    @swagger_auto_schema(query_serializer=UserListQuerySerializer, responses={200: UserSerializerrr(many=True)})
     def get(self, request):
         queryset = User.objects.all()
         serializer = UserSerializerrr(queryset, many=True)

tests/conftest.py

@@ -45,8 +45,8 @@ def validate_schema():
         from flex.core import parse as validate_flex
         from swagger_spec_validator.validator20 import validate_spec as validate_ssv
 
-        validate_flex(swagger)
+        validate_flex(copy.deepcopy(swagger))
-        validate_ssv(swagger)
+        validate_ssv(copy.deepcopy(swagger))
 
     return validate_schema
 

tests/reference.yaml

@@ -187,8 +187,6 @@ paths:
       responses:
         '200':
           description: ''
-          schema:
-            $ref: '#/definitions/Article'
       consumes:
         - multipart/form-data
       tags:
@@ -221,8 +219,8 @@ paths:
           required: true
           type: file
       responses:
-        '200':
+        '201':
-          description: success
+          description: ''
       consumes:
         - multipart/form-data
       tags:
@@ -353,7 +351,17 @@ paths:
     get:
       operationId: users_list
       description: UserList cbv classdoc
-      parameters: []
+      parameters:
+        - name: username
+          in: query
+          description: this field is generated from a query_serializer
+          required: true
+          type: string
+        - name: is_staff
+          in: query
+          description: this one too!
+          required: true
+          type: boolean
       responses:
         '200':
           description: ''
@@ -372,7 +380,7 @@ paths:
         - name: data
           in: body
           required: true
-          schema: &id001
+          schema:
             required:
               - username
             type: object
@@ -382,7 +390,13 @@ paths:
       responses:
         '201':
           description: ''
-          schema: *id001
+          schema:
+            required:
+              - username
+            type: object
+            properties:
+              username:
+                type: string
       consumes:
         - application/json
       tags:

tests/test_schema_generator.py

@@ -40,10 +40,18 @@ def test_json_codec_roundtrip(codec_json, generator, validate_schema):
 def test_yaml_codec_roundtrip(codec_yaml, generator, validate_schema):
     swagger = generator.get_schema(None, True)
     yaml_bytes = codec_yaml.encode(swagger)
-    assert b'omap' not in yaml_bytes
+    assert b'omap' not in yaml_bytes  # ensure no ugly !!omap is outputted
+    assert b'&id' not in yaml_bytes and b'*id' not in yaml_bytes  # ensure no YAML references are generated
     validate_schema(yaml.safe_load(yaml_bytes.decode('utf-8')))
 
 
+def test_yaml_and_json_match(codec_yaml, codec_json, generator):
+    swagger = generator.get_schema(None, True)
+    yaml_schema = yaml.safe_load(codec_yaml.encode(swagger).decode('utf-8'))
+    json_schema = json.loads(codec_json.encode(swagger).decode('utf-8'))
+    assert yaml_schema == json_schema
+
+
 def test_basepath_only():
     generator = OpenAPISchemaGenerator(
         info=openapi.Info(title="Test generator", default_version="v1"),

tests/test_schema_views.py

@@ -1,4 +1,5 @@
 import json
+from collections import OrderedDict
 
 import pytest
 from ruamel import yaml
@@ -46,6 +47,26 @@ def test_redoc(client, validate_schema):
     _validate_text_schema_view(client, validate_schema, '/redoc/?format=openapi', json.loads)
 
 
+def test_caching(client, validate_schema):
+    prev_schema = None
+
+    for i in range(3):
+        _validate_ui_schema_view(client, '/cached/redoc/', 'redoc/redoc.min.js')
+        _validate_text_schema_view(client, validate_schema, '/cached/redoc/?format=openapi', json.loads)
+        _validate_ui_schema_view(client, '/cached/swagger/', 'swagger-ui-dist/swagger-ui-bundle.js')
+        _validate_text_schema_view(client, validate_schema, '/cached/swagger/?format=openapi', json.loads)
+
+        json_schema = client.get('/cached/swagger.json')
+        assert json_schema.status_code == 200
+        json_schema = json.loads(json_schema.content.decode('utf-8'), object_pairs_hook=OrderedDict)
+        if prev_schema is None:
+            validate_schema(json_schema)
+            prev_schema = json_schema
+        else:
+            from datadiff.tools import assert_equal
+            assert_equal(prev_schema, json_schema)
+
+
 @pytest.mark.urls('urlconfs.non_public_urls')
 def test_non_public(client):
     response = client.get('/private/swagger.yaml')