diff --git a/tests/test_flask.py b/tests/test_flask.py
index 6e8c2e2..b1702b9 100644
--- a/tests/test_flask.py
+++ b/tests/test_flask.py
@@ -1,10 +1,11 @@
 import unittest
-from flask import Flask
+from flask import Flask, json
 from wsmeext.flask import signature
 from wsme.types import Base, text
 
 
 class Model(Base):
+    id = int
     name = text
 
 
@@ -26,11 +27,11 @@ def divide_by_zero():
 @test_app.route('/models')
 @signature([Model])
 def list_models():
-    return [Model(name=1)]
+    return [Model(name='first')]
 
 
 @test_app.route('/models/<name>')
-@signature(Model)
+@signature(Model, text)
 def get_model(name):
     return Model(name=name)
 
@@ -63,9 +64,13 @@ class FlaskrTestCase(unittest.TestCase):
         assert resp.status_code == 200
 
     def test_post_model(self):
-        resp = self.app.post('/models', data={"name": "test"})
-        import ipdb
-        ipdb.set_trace()
+        resp = self.app.post('/models', data={"body.name": "test"})
+        assert resp.status_code == 200
+        resp = self.app.post(
+            '/models',
+            data=json.dumps({"name": "test"}),
+            content_type="application/json"
+        )
         assert resp.status_code == 200
 
     def test_serversideerror(self):
diff --git a/wsme/rest/args.py b/wsme/rest/args.py
index cd83472..f88ec3b 100644
--- a/wsme/rest/args.py
+++ b/wsme/rest/args.py
@@ -158,7 +158,7 @@ def args_from_args(funcdef, args, kwargs):
         newargs.append(from_param(argdef.datatype, arg))
     newkwargs = {}
     for argname, value in kwargs.items():
-        newkwargs[argname] = from_param(funcdef.get_arg(argname), value)
+        newkwargs[argname] = from_param(funcdef.get_arg(argname).datatype, value)
     return newargs, newkwargs
 
 
@@ -229,7 +229,7 @@ def combine_args(funcdef, akw, allow_override=False):
     return newargs, newkwargs
 
 
-def get_args(funcdef, args, kwargs, params, body, mimetype):
+def get_args(funcdef, args, kwargs, params, form, body, mimetype):
     """Combine arguments from :
     * the host framework args and kwargs
     * the request params
@@ -248,13 +248,19 @@ def get_args(funcdef, args, kwargs, params, body, mimetype):
     # extract args from the request parameters
     from_params = args_from_params(funcdef, params)
 
+    # extract args from the form parameters
+    if form:
+        from_form_params = args_from_params(funcdef, form)
+    else:
+        from_form_params = (), {}
+
     # extract args from the request body
     from_body = args_from_body(funcdef, body, mimetype)
 
     # combine params and body arguments
     from_params_and_body = combine_args(
         funcdef,
-        (from_params, from_body)
+        (from_params, from_form_params, from_body)
     )
 
     return combine_args(
diff --git a/wsmeext/flask.py b/wsmeext/flask.py
index 9d67153..017ea11 100644
--- a/wsmeext/flask.py
+++ b/wsmeext/flask.py
@@ -21,12 +21,15 @@ def signature(*args, **kw):
     def decorator(f):
         sig(f)
         funcdef = wsme.api.FunctionDefinition.get(f)
+        funcdef.resolve_types(wsme.types.registry)
 
         @functools.wraps(f)
         def wrapper(*args, **kwargs):
             args, kwargs = wsme.rest.args.get_args(
-                funcdef, args, kwargs, flask.request.args, flask.request.data,
-                flask.request.content_type
+                funcdef, args, kwargs,
+                flask.request.args, flask.request.form,
+                flask.request.data,
+                flask.request.mimetype
             )
 
             dataformat = None