diff --git a/pyswagger/primitives/render.py b/pyswagger/primitives/render.py
index 8c0a646..158a59d 100644
--- a/pyswagger/primitives/render.py
+++ b/pyswagger/primitives/render.py
@@ -186,6 +186,7 @@ def _generate(self, obj, opt):
         template = opt['object_template']
         out = None
         if type_ == 'object':
+            max_p = opt['max_property']
             out = {}
             max_ = obj.maxProperties if obj.maxProperties else opt['max_prop_count']
             min_ = obj.minProperties if obj.minProperties else None
@@ -194,7 +195,7 @@ def _generate(self, obj, opt):
                 if name in template:
                     out[name] = template[name]
                     continue
-                if not name in obj.required:
+                if not max_p and not name in obj.required:
                     if random.randint(0, 1) == 0 or opt['minimal_property']:
                         continue
                 out[name] = self._generate(prop, opt)
@@ -250,6 +251,8 @@ def default():
         - files: registered file object: refer to pyswagger.primitives.File for details
         - object_template: dict of default values assigned for properties when 'name' matched
         - parameter_template: dict of default values assigned for parameters when 'name matched
+        - max_property: all properties are generated, ignore 'required'
+        - max_parameter: all parameters are generated, ignore 'required'
 
         :return: options
         :rtype: dict
@@ -266,6 +269,8 @@ def default():
             files=[],
             object_template={},
             parameter_template={},
+            max_property=False,
+            max_parameter=False,
         ) 
 
     def render(self, obj, opt=None):
@@ -304,6 +309,7 @@ def render_all(self, op, exclude=[], opt=None):
             raise ValueError('Not a dict: {0}'.format(opt))
 
         template = opt['parameter_template']
+        max_p = opt['max_parameter']
         out = {}
         for p in op.parameters:
             if p.name in exclude:
@@ -311,7 +317,7 @@ def render_all(self, op, exclude=[], opt=None):
             if p.name in template:
                 out.update({p.name: template[p.name]})
                 continue
-            if not p.required:
+            if not max_p and not p.required:
                 if random.randint(0, 1) == 0 or opt['minimal_parameter']:
                     continue
             out.update({p.name: self.render(p, opt=opt)})
diff --git a/pyswagger/tests/data/v2_0/render/object/swagger.json b/pyswagger/tests/data/v2_0/render/object/swagger.json
index 85d941e..409ea3b 100644
--- a/pyswagger/tests/data/v2_0/render/object/swagger.json
+++ b/pyswagger/tests/data/v2_0/render/object/swagger.json
@@ -6,6 +6,24 @@
 
    },
    "definitions":{
+      "user2":{
+         "type":"object",
+         "properties":{
+            "id":{
+               "type":"integer",
+               "format":"int32",
+               "maximum":100,
+               "minimum":1
+            },
+            "name":{
+               "type":"string"
+            },
+            "email":{
+               "type":"string",
+               "format":"email"
+            }
+         }
+      },
       "user":{
          "type":"object",
          "properties":{
diff --git a/pyswagger/tests/data/v2_0/render/operation/swagger.json b/pyswagger/tests/data/v2_0/render/operation/swagger.json
index 994efb4..c8e7016 100644
--- a/pyswagger/tests/data/v2_0/render/operation/swagger.json
+++ b/pyswagger/tests/data/v2_0/render/operation/swagger.json
@@ -121,6 +121,36 @@
                   "description":"successful operation"
                }
             }
+         },
+         "get":{
+            "parameters":[
+               {
+                  "name":"p1",
+                  "in":"query",
+                  "required":false,
+                  "type":"string",
+                  "format":"email"
+               },
+               {
+                  "name":"p2",
+                  "in":"query",
+                  "required":false,
+                  "type":"string",
+                  "format":"email"
+               },
+               {
+                  "name":"p3",
+                  "in":"query",
+                  "required":false,
+                  "type":"string",
+                  "format":"email"
+               }
+            ],
+            "responses":{
+               "default":{
+                  "description":"successful operation"
+               }
+            }
          }
       }
    },
@@ -147,4 +177,4 @@
          ]
       }
    }
-}
\ No newline at end of file
+}
diff --git a/pyswagger/tests/test_render.py b/pyswagger/tests/test_render.py
index 3b07661..dc9346a 100644
--- a/pyswagger/tests/test_render.py
+++ b/pyswagger/tests/test_render.py
@@ -331,6 +331,21 @@ def test_template(self):
             self.assertTrue(validate_email(o['comment']))
             self.assertTrue(isinstance(o['time'], datetime.datetime), 'should be a datetime, not {0}'.format(str(type(o['time']))))
 
+    def test_max_property(self):
+        """ make sure max_property works """
+        opt = self.rnd.default()
+        opt['max_property'] = True
+        obj = self.app.resolve('#/definitions/user2')
+        for _ in six.moves.xrange(50):
+            o = self.rnd.render(
+                obj,
+                opt=opt
+            )
+            self.assertTrue('id' in o, 'should have id')
+            self.assertTrue('name' in o, 'should have name')
+            self.assertTrue('email' in o, 'should have email')
+
+
 class ParameterTestCase(unittest.TestCase):
     """ test case for rendering a single Parameter,
     type/format specific tests are covered by other
@@ -552,6 +567,17 @@ def test_minimal(self):
             self.assertTrue('p3' in ps, 'p3 should exist')
         self.assertTrue(count > 0, 'count should be larger than zero, not {0}'.format(count))
 
+    def test_max_parameter(self):
+        """ make sure max_parameter works """
+        op = self.app.s('api.2').get
+        opt = self.rnd.default()
+        opt['max_parameter'] = True
+        for _ in six.moves.xrange(50):
+            ps = self.rnd.render_all(op, opt=opt)
+            self.assertTrue('p1' in ps, 'p1 should exists')
+            self.assertTrue('p2' in ps, 'p2 should exists')
+            self.assertTrue('p2' in ps, 'p3 should exists')
+
     def test_exclude(self):
         """ make sure exclude works """
         op = self.app.s('api.1').get