Added LMS magic

done/done.py

@@ -26,6 +26,8 @@ class DoneXBlock(XBlock):
            default = "left"
         )
 
+    has_score = True
+
     def resource_string(self, path):
         """Handy helper for getting resources from our kit."""
         data = pkg_resources.resource_string(__name__, path)
@@ -78,3 +80,41 @@ class DoneXBlock(XBlock):
                 </vertical_demo>
              """),
         ]
+
+    ## Everything below is stolen from https://github.com/edx/edx-ora2/blob/master/apps/openassessment/xblock/lms_mixin.py
+    ## It's needed to keep the LMS+Studio happy. 
+    ## It should be included as a mixin. 
+
+    display_name = String(
+        default="Completion", scope=Scope.settings,
+        help="Display name"
+    )
+
+    start = DateTime(
+        default=None, scope=Scope.settings,
+        help="ISO-8601 formatted string representing the start date of this assignment. We ignore this."
+    )
+
+    due = DateTime(
+        default=None, scope=Scope.settings,
+        help="ISO-8601 formatted string representing the due date of this assignment. We ignore this."
+    )
+
+    weight = Float(
+        display_name="Problem Weight",
+        help=("Defines the number of points each problem is worth. "
+              "If the value is not set, the problem is worth the sum of the "
+              "option point values."),
+        values={"min": 0, "step": .1},
+        scope=Scope.settings
+    )
+
+    def has_dynamic_children(self):
+        """Do we dynamically determine our children? No, we don't have any.
+        """
+        return False
+
+    def max_score(self):
+        """The maximum raw score of our problem.
+        """
+        return 1