RegisterFormMixin can now to_dict all fields.

It adds a to_dict function that uses inspect to add all wtf Field
to the returned dict. This allows extensions to the register form
to easily add fields that will be passed to the datastore's
create_user function.

flask_security/forms.py

@@ -9,10 +9,12 @@
     :license: MIT, see LICENSE for more details.
 """
 
+import inspect
+
 from flask import request, current_app
 from flask.ext.wtf import Form as BaseForm, TextField, PasswordField, \
      SubmitField, HiddenField, Required, BooleanField, EqualTo, Email, \
-     ValidationError, Length
+     ValidationError, Length, Field
 from werkzeug.local import LocalProxy
 
 from .confirmable import requires_confirmation
@@ -89,6 +91,10 @@ class NextFormMixin():
 class RegisterFormMixin():
     submit = SubmitField("Register")
 
+    def to_dict(form):
+        fields = inspect.getmembers(form, lambda member: isinstance(member, Field))
+        return dict((key, value.data) for key, value in fields)
+
 
 class SendConfirmationForm(Form, UserEmailFormMixin):
     """The default forgot password form"""
@@ -172,10 +178,7 @@ class LoginForm(Form, NextFormMixin):
 
 class ConfirmRegisterForm(Form, RegisterFormMixin,
                           UniqueEmailFormMixin, NewPasswordFormMixin):
-    def to_dict(self):
-        return dict(email=self.email.data,
-                    password=self.password.data)
-
+    pass
 
 class RegisterForm(ConfirmRegisterForm, PasswordConfirmFormMixin):
     pass