Remove explain attribute in favor of solution stanza as exemplified in edx4edx

common/lib/xmodule/xmodule/capa_module.py

@@ -78,11 +78,6 @@ class CapaModule(XModule):
 
         dom2 = etree.fromstring(definition['data'])
 
-        self.explanation = "problems/" + only_one(dom2.xpath('/problem/@explain'),
-                                                  default="closed")
-        # TODO: Should be converted to: self.explanation=only_one(dom2.xpath('/problem/@explain'), default="closed")
-        self.explain_available = only_one(dom2.xpath('/problem/@explain_available'))
-
         display_due_date_string = self.metadata.get('due', None)
         if display_due_date_string is not None:
             self.display_due_date = dateutil.parser.parse(display_due_date_string)
@@ -244,16 +239,6 @@ class CapaModule(XModule):
         if self.max_attempts is None and self.rerandomize != "always":
             save_button = False
 
-        # Check if explanation is available, and if so, give a link
-        explain = ""
-        if self.lcp.done and self.explain_available == 'attempted':
-            explain = self.explanation
-        if self.closed() and self.explain_available == 'closed':
-            explain = self.explanation
-
-        if len(explain) == 0:
-            explain = False
-
         context = {'problem': content,
                    'id': self.id,
                    'check_button': check_button,
@@ -263,7 +248,6 @@ class CapaModule(XModule):
                    'ajax_url': self.system.ajax_url,
                    'attempts_used': self.attempts,
                    'attempts_allowed': self.max_attempts,
-                   'explain': explain,
                    'progress': self.get_progress(),
                    }
 

lms/templates/problem.html

@@ -30,9 +30,6 @@
     % if answer_available:
     <input class="show" type="button" value="Show Answer">
     % endif
-    % if explain :
-    <a href="/courseware/6.002_Spring_2012/${ explain }" class="new-page">Explanation</a>
-    % endif
     % if attempts_allowed :
     <section class="submission_feedback">
     You have used ${ attempts_used } of ${ attempts_allowed } submissions