From a9a37d109884c919bd6107dab0eda7d10b0ceada Mon Sep 17 00:00:00 2001
From: Gleb Voropaev <info@gvoropaev.com>
Date: Fri, 30 Aug 2019 13:41:14 +0300
Subject: [PATCH 1/2] Added test case (test coverage fix)

---
 tests/test_swagger.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/tests/test_swagger.py b/tests/test_swagger.py
index 859994ae..2529fb00 100644
--- a/tests/test_swagger.py
+++ b/tests/test_swagger.py
@@ -2042,6 +2042,26 @@ def get(self):
 
         client.get_specs(status=500)
 
+    def test_recursive_model(self, api, client):
+        fields = api.model('Person', {
+            'name': restplus.fields.String,
+            'age': restplus.fields.Integer,
+            'birthdate': restplus.fields.DateTime
+        })
+
+        fields["children"] = restplus.fields.List(
+            restplus.fields.Nested(fields),
+            default=[])
+
+        @api.route('/recursive-model/')
+        @api.doc(get={'model': fields})
+        class ModelAsDict(restplus.Resource):
+            @api.marshal_with(fields)
+            def get(self):
+                return {}
+
+        client.get_specs(status=200)
+
     def test_clone(self, api, client):
         parent = api.model('Person', {
             'name': restplus.fields.String,

From cd264639fb95575f0142b87e14562b7901936e4a Mon Sep 17 00:00:00 2001
From: Mat Gadd <source@catchall.drarok.com>
Date: Tue, 18 Jun 2019 11:33:07 +0100
Subject: [PATCH 2/2] Fix infinite recursion in swagger.py for circular models,
 fixes #190

---
 flask_restplus/swagger.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/flask_restplus/swagger.py b/flask_restplus/swagger.py
index 681b08d2..21e1aeb7 100644
--- a/flask_restplus/swagger.py
+++ b/flask_restplus/swagger.py
@@ -574,6 +574,8 @@ def register_model(self, model):
         if name not in self.api.models:
             raise ValueError('Model {0} not registered'.format(name))
         specs = self.api.models[name]
+        if name in self._registered_models:
+            return ref(model)
         self._registered_models[name] = specs
         if isinstance(specs, ModelBase):
             for parent in specs.__parents__: