Fix LightChild fields instanciation issue

mentoring/light_children.py

@@ -25,6 +25,7 @@
 
 import logging
 import json
+import copy
 
 from lazy import lazy
 
@@ -102,6 +103,14 @@ class LightChildrenMixin(XBlockWithChildrenFragmentsMixin):
         child = child_class(block)
         child.name = u'{}_{}'.format(block.name, child_id)
 
+        # Instanciate our LightChild fields
+        # TODO HACK, Since we are not replacing the fields attribute with directly, we need to
+        # instanciate new fields for our LightChild.
+        fields = [(attr, value) for attr, value in child_class.__dict__.iteritems() if \
+                  isinstance(value, LightChildField)]
+        for attr, value in fields:
+            child.__dict__[attr] = copy.deepcopy(value)
+
         # Add any children the child may itself have
         child_class.init_block_from_node(child, xml_child, xml_child.items())
 
@@ -257,13 +266,13 @@ class LightChild(Plugin, LightChildrenMixin):
             return
 
         student_data = json.loads(self.student_data)
-        fields = self.get_fields()
+        fields = self.get_fields_to_save()
         for field in fields:
             if field in student_data:
                 setattr(self, field, student_data[field])
 
     @classmethod
-    def get_fields(cls):
+    def get_fields_to_save(cls):
         """
         Returns a list of all LightChildField of the class. Used for saving student data.
         """
@@ -281,7 +290,7 @@ class LightChild(Plugin, LightChildrenMixin):
         self.student_data = {}
 
         # Get All LightChild fields to save
-        for field in self.get_fields():
+        for field in self.get_fields_to_save():
             self.student_data[field] = getattr(self, field).to_json()
 
         if self.name:

mentoring/mrq.py

@@ -48,7 +48,7 @@ class MRQBlock(QuestionnaireAbstractBlock):
 
     # TODO REMOVE THIS, ONLY NEEDED FOR LIGHTCHILDREN
     @classmethod
-    def get_fields(cls):
+    def get_fields_to_save(cls):
         return [
             'num_attempts'
         ]
@@ -57,19 +57,23 @@ class MRQBlock(QuestionnaireAbstractBlock):
     def submit(self, submissions):
         log.debug(u'Received MRQ submissions: "%s"', submissions)
 
+        # Ensure our data are loaded from the db
+        # TODO HACK, TO REMOVE.
+        self.load_student_data()
+
         completed = True
 
         results = []
         for choice in self.custom_choices:
             choice_completed = True
             choice_tips_fragments = []
-            choice_selected = choice.value in submissions
+            choice_selected = choice.value.get() in submissions
             for tip in self.get_tips():
-                if choice.value in tip.display_with_defaults:
+                if choice.value.get() in tip.display_with_defaults:
                     choice_tips_fragments.append(tip.render())
 
-                if ((not choice_selected and choice.value in tip.require_with_defaults) or
-                        (choice_selected and choice.value in tip.reject_with_defaults)):
+                if ((not choice_selected and choice.value.get() in tip.require_with_defaults) or
+                        (choice_selected and choice.value.get() in tip.reject_with_defaults)):
                     choice_completed = False
 
             completed = completed and choice_completed
@@ -86,8 +90,6 @@ class MRQBlock(QuestionnaireAbstractBlock):
 
         self.message = u'Your answer is correct!' if completed else u'Your answer is incorrect.'
 
-        # What's the proper way to get my value saved? it doesn't work without '.value'
-        # this is incorrect and the num_attempts is resetted if we restart the server.
         num_attempts = self.num_attempts.get() + 1 if self.max_attempts else 0
         setattr(self, 'num_attempts', num_attempts)
 
@@ -99,9 +101,9 @@ class MRQBlock(QuestionnaireAbstractBlock):
 
         if max_attempts_reached and (not completed or num_attempts > max_attempts):
             completed = True
-            self.message += u' You have reached the maximum number of attempts for this question. ' \
-            'Your next answers won''t be saved. You can check the answer(s) using the "Show Answer(s)" button.'
-        else: # only save the student_choices if there was a attempt left, might be incorrect or unuseful
+            self.message = self.message.get() + u' You have reached the maximum number of attempts for this question. ' \
+            u'Your next answers won''t be saved. You can check the answer(s) using the "Show Answer(s)" button.'
+
         self.student_choices = submissions
 
         result = {