Implement leaderboard authoring

openassessment/templates/openassessmentblock/edit/oa_edit.html

@@ -99,7 +99,7 @@
                     </div>
                     <p class="setting-help">{% trans "The date and time when students can no longer submit responses." %}</p>
                 </li>
-                <li id="openassessment_sumbission_image_wrapper" class="field comp-setting-entry">
+                <li id="openassessment_submission_image_wrapper" class="field comp-setting-entry">
                     <div class="wrapper-comp-setting">
                         <label for="openassessment_submission_image_editor" class="setting-label">{% trans "Allow Image Responses"%}</label>
                         <select id="openassessment_submission_image_editor" class="input setting-input" name="image submission">
@@ -109,6 +109,20 @@
                     </div>
                     <p class="setting-help">{% trans "Specify whether students can submit an image file along with their text response." %}</p>
                 </li>
+                <li id="openassessment_leaderboard_wrapper" class="field comp-setting-entry">
+                    <div class="wrapper-comp-setting">
+                        <label for="openassessment_leaderboard_editor" class="setting-label">{% trans "Number of Leaderboard Scores" %}</label>
+                        <input
+                            id="openassessment_leaderboard_editor"
+                            class="input setting-input"
+                            type="number"
+                            value="{{ leaderboard_show }}"
+                            min="0" max="99"
+                        />
+                    </div>
+                    <p class="setting-help">{% trans "Set the number of scores to display on the leaderboard.  If set to 0, the leaderboard will not be shown." %}</p>
+                </li>
+                <li>
             </ul>
 
             <p class="openassessment_description" id="openassessment_step_select_description">

openassessment/xblock/openassessmentblock.py

@@ -380,7 +380,8 @@ class OpenAssessmentBlock(
             create_rubric_dict(config['prompt'], config['rubric_criteria']),
             config['rubric_assessments'],
             submission_start=config['submission_start'],
-            submission_due=config['submission_due']
+            submission_due=config['submission_due'],
+            leaderboard_show=config['leaderboard_show']
         )
 
         block.rubric_criteria = config['rubric_criteria']

openassessment/xblock/schema.py

@@ -72,6 +72,7 @@ EDITOR_UPDATE_SCHEMA = Schema({
     Required('submission_start'): Any(datetime_validator, None),
     Required('submission_due'): Any(datetime_validator, None),
     Required('allow_file_upload'): bool,
+    Required('leaderboard_show'): int,
     Required('assessments'): [
         Schema({
             Required('name'): All(utf8_validator, In(VALID_ASSESSMENT_TYPES)),

openassessment/xblock/static/js/fixtures/templates.json

@@ -402,6 +402,7 @@
             "title": "The most important of all questions.",
             "submission_start": "2014-01-02T12:15",
             "submission_due": "2014-10-01T04:53",
+            "leaderboard_show": 12,
             "criteria": [
                 {
                     "name": "criterion_1",
@@ -482,6 +483,7 @@
             "title": "Test title",
             "submission_start": "2014-01-1T10:00:00",
             "submission_due": "2014-10-1T10:00:00",
+            "leaderboard_show": 12,
             "criteria": [
                 {
                     "name": "criterion_with_two_options",

openassessment/xblock/static/js/spec/oa_server.js

@@ -239,7 +239,9 @@ describe("OpenAssessment.Server", function() {
             submissionDue: SUBMISSION_DUE,
             criteria: CRITERIA,
             assessments: ASSESSMENTS,
-            editorAssessmentsOrder: EDITOR_ASSESSMENTS_ORDER
+            editorAssessmentsOrder: EDITOR_ASSESSMENTS_ORDER,
+            imageSubmissionEnabled: true,
+            leaderboardNum: 15
         });
         expect($.ajax).toHaveBeenCalledWith({
             type: "POST", url: '/update_editor_context',
@@ -251,7 +253,9 @@ describe("OpenAssessment.Server", function() {
                 submission_due: SUBMISSION_DUE,
                 criteria: CRITERIA,
                 assessments: ASSESSMENTS,
-                editor_assessments_order: EDITOR_ASSESSMENTS_ORDER
+                editor_assessments_order: EDITOR_ASSESSMENTS_ORDER,
+                allow_file_upload: true,
+                leaderboard_show: 15
             })
         });
     });

openassessment/xblock/static/js/spec/studio/oa_edit.js

@@ -48,6 +48,7 @@ describe("OpenAssessment.StudioView", function() {
         submissionStart: "2014-01-02T12:15",
         submissionDue: "2014-10-01T04:53",
         imageSubmissionEnabled: false,
+        leaderboardNum: 12,
         criteria: [
             {
                 order_num: 0,
@@ -149,6 +150,7 @@ describe("OpenAssessment.StudioView", function() {
         expect(server.receivedData.submissionStart).toEqual(EXPECTED_SERVER_DATA.submissionStart);
         expect(server.receivedData.submissionDue).toEqual(EXPECTED_SERVER_DATA.submissionDue);
         expect(server.receivedData.imageSubmissionEnabled).toEqual(EXPECTED_SERVER_DATA.imageSubmissionEnabled);
+        expect(server.receivedData.leaderboardNum).toEqual(EXPECTED_SERVER_DATA.leaderboardNum);
 
         // Criteria
         for (var criterion_idx = 0; criterion_idx < EXPECTED_SERVER_DATA.criteria.length; criterion_idx++) {

openassessment/xblock/static/js/spec/studio/oa_edit_settings.js

@@ -91,6 +91,14 @@ describe("OpenAssessment.EditSettingsView", function() {
         expect(view.imageSubmissionEnabled()).toBe(false);
     });
 
+    it("sets and loads the leaderboard number", function() {
+        view.leaderboardNum(18);
+        expect(view.leaderboardNum()).toEqual(18);
+
+        view.leaderboardNum(0);
+        expect(view.leaderboardNum()).toEqual(0);
+    });
+
     it("builds a description of enabled assessments", function() {
         // Depends on the template having an original order
         // of training --> peer --> self --> ai
@@ -157,6 +165,32 @@ describe("OpenAssessment.EditSettingsView", function() {
         );
     });
 
+    it("validates the leaderboard number field", function() {
+        // Valid value for the leaderboard number
+        view.leaderboardNum(0);
+        expect(view.validate()).toBe(true);
+        expect(view.validationErrors()).toEqual([]);
+
+        // Below the minimum
+        view.leaderboardNum(-1);
+        expect(view.validate()).toBe(false);
+        expect(view.validationErrors()).toContain(
+            "Leaderboard number is invalid"
+        );
+
+        // Clear validation errors
+        view.clearValidationErrors();
+        expect(view.validationErrors()).toEqual([]);
+
+        // Valid, near the maximum
+        view.leaderboardNum(100);
+        expect(view.validate()).toBe(true);
+
+        // Above the maximum
+        view.leaderboardNum(101);
+        expect(view.validate()).toBe(false);
+    });
+
     it("validates assessment views", function() {
         // Simulate one of the assessment views being invalid
         assessmentViews[PEER].isValid = false;

openassessment/xblock/static/js/src/oa_server.js

@@ -418,6 +418,7 @@ if (typeof OpenAssessment.Server == "undefined" || !OpenAssessment.Server) {
             criteria (list of object literals): The rubric criteria.
             assessments (list of object literals): The assessments the student will be evaluated on.
             imageSubmissionEnabled (boolean): TRUE if image attachments are allowed.
+            leaderboardNum (int): The number of scores to show in the leaderboard.
 
         Returns:
             A JQuery promise, which resolves with no arguments
@@ -435,7 +436,8 @@ if (typeof OpenAssessment.Server == "undefined" || !OpenAssessment.Server) {
                 criteria: kwargs.criteria,
                 assessments: kwargs.assessments,
                 editor_assessments_order: kwargs.editorAssessmentsOrder,
-                allow_file_upload: kwargs.imageSubmissionEnabled
+                allow_file_upload: kwargs.imageSubmissionEnabled,
+                leaderboard_show: kwargs.leaderboardNum
             });
             return $.Deferred(function(defer) {
                 $.ajax({

openassessment/xblock/static/js/src/studio/oa_edit.js

@@ -193,6 +193,7 @@ OpenAssessment.StudioView.prototype = {
             submissionDue: view.settingsView.submissionDue(),
             assessments: view.settingsView.assessmentsDescription(),
             imageSubmissionEnabled: view.settingsView.imageSubmissionEnabled(),
+            leaderboardNum: view.settingsView.leaderboardNum(),
             editorAssessmentsOrder: view.settingsView.editorAssessmentsOrder()
         }).done(
             // Notify the client-side runtime that we finished saving

openassessment/xblock/static/js/src/studio/oa_edit_settings.js

@@ -27,6 +27,11 @@ OpenAssessment.EditSettingsView = function(element, assessmentViews) {
         "#openassessment_submission_due_time"
     ).install();
 
+    this.leaderboardIntField = new OpenAssessment.IntField(
+        $("#openassessment_leaderboard_editor", this.element),
+        { min: 0, max: 100 }
+    );
+
     this.initializeSortableAssessments();
 };
 
@@ -128,7 +133,7 @@ OpenAssessment.EditSettingsView.prototype = {
     **/
     imageSubmissionEnabled: function(isEnabled) {
         var sel = $("#openassessment_submission_image_editor", this.settingsElement);
-        if (typeof(isEnabled) !== "undefined") {
+        if (isEnabled !== undefined) {
             if (isEnabled) { sel.val(1); }
             else { sel.val(0); }
         }
@@ -136,6 +141,24 @@ OpenAssessment.EditSettingsView.prototype = {
     },
 
     /**
+    Get or set the number of scores to show in the leaderboard.
+    If set to 0, the leaderboard will not be shown.
+
+    Args:
+        num (int, optional)
+
+    Returns:
+        int
+
+    **/
+    leaderboardNum: function(num) {
+        if (num !== undefined) {
+            this.leaderboardIntField.set(num);
+        }
+        return this.leaderboardIntField.get(num);
+    },
+
+    /**
     Construct a list of enabled assessments and their properties.
 
 
@@ -212,6 +235,7 @@ OpenAssessment.EditSettingsView.prototype = {
 
         isValid = (this.startDatetimeControl.validate() && isValid);
         isValid = (this.dueDatetimeControl.validate() && isValid);
+        isValid = (this.leaderboardIntField.validate() && isValid);
 
         // Validate each of the *enabled* assessment views
         $.each(this.assessmentViews, function() {
@@ -240,10 +264,14 @@ OpenAssessment.EditSettingsView.prototype = {
         if (this.dueDatetimeControl.validationErrors().length > 0) {
             errors.push("Submission due is invalid");
         }
+        if (this.leaderboardIntField.validationErrors().length > 0) {
+            errors.push("Leaderboard number is invalid");
+        }
 
         $.each(this.assessmentViews, function() {
             errors = errors.concat(this.validationErrors());
         });
+
         return errors;
     },
 
@@ -253,6 +281,7 @@ OpenAssessment.EditSettingsView.prototype = {
     clearValidationErrors: function() {
         this.startDatetimeControl.clearValidationErrors();
         this.dueDatetimeControl.clearValidationErrors();
+        this.leaderboardIntField.clearValidationErrors();
         $.each(this.assessmentViews, function() {
             this.clearValidationErrors();
         });

openassessment/xblock/studio_mixin.py

@@ -114,6 +114,7 @@ class StudioMixin(object):
             'criteria': criteria,
             'feedbackprompt': self.rubric_feedback_prompt,
             'allow_file_upload': self.allow_file_upload,
+            'leaderboard_show': self.leaderboard_show,
             'editor_assessments_order': [
                 make_django_template_key(asmnt)
                 for asmnt in editor_assessments_order
@@ -187,6 +188,7 @@ class StudioMixin(object):
             data['assessments'],
             submission_start=data['submission_start'],
             submission_due=data['submission_due'],
+            leaderboard_show=data['leaderboard_show']
         )
         if not success:
             return {'success': False, 'msg': self._('Validation error: {error}').format(error=msg)}
@@ -203,6 +205,7 @@ class StudioMixin(object):
         self.submission_start = data['submission_start']
         self.submission_due = data['submission_due']
         self.allow_file_upload = bool(data['allow_file_upload'])
+        self.leaderboard_show = data['leaderboard_show']
 
         return {'success': True, 'msg': self._(u'Successfully updated OpenAssessment XBlock')}
 

openassessment/xblock/test/data/invalid_update_xblock.json

@@ -4,6 +4,7 @@
         "title": "My new title.",
         "feedback_prompt": "Feedback prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "peer-assessment",
@@ -26,6 +27,7 @@
     "no_prompt": {
         "feedback_prompt": "Feedback prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -74,6 +76,7 @@
     "no_feedback_prompt": {
         "prompt": "Test prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -123,6 +126,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -171,6 +175,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -221,6 +226,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -271,6 +277,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": "Hello",
@@ -313,6 +320,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -354,6 +362,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "prompty",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             []
         ],
@@ -374,6 +383,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -415,6 +425,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -442,6 +453,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -478,6 +490,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -519,6 +532,7 @@
         "feedback_prompt": "Feedback prompt",
         "prompt": "Test Prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -669,6 +683,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "student-training",
@@ -723,6 +738,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "student-training",
@@ -775,6 +791,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "student-training",
@@ -830,6 +847,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "student-training",
@@ -885,6 +903,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "student-training",
@@ -934,6 +953,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "student-training",
@@ -990,6 +1010,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "peer-assessment",
@@ -1038,6 +1059,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "peer-assessment",
@@ -1087,6 +1109,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "peer-assessment",
@@ -1112,6 +1135,7 @@
         "prompt": "Test Prompt",
         "feedback_prompt": "Feedback prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -1160,6 +1184,7 @@
         "prompt": "Test Prompt",
         "feedback_prompt": "Feedback prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -1208,6 +1233,7 @@
         "prompt": "Test Prompt",
         "feedback_prompt": "Feedback prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,
@@ -1279,6 +1305,7 @@
         "prompt": "Test Prompt",
         "feedback_prompt": "Feedback prompt",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "criteria": [
             {
                 "order_num": 0,

openassessment/xblock/test/data/update_from_xml_error.json

@@ -452,69 +452,6 @@
         ]
     },
 
-    "leaderboard_num_zero": {
-        "xml": [
-            "<openassessment leaderboard_show=\"0\">",
-            "<title>Foo</title>",
-            "<assessments>",
-                "<assessment name=\"peer-assessment\" start=\"2014-02-27T09:46:28\" due=\"2014-03-01T00:00:00\" must_grade=\"5\" must_be_graded_by=\"3\" />",
-                "<assessment name=\"self-assessment\" start=\"2014-04-01T00:00:00\" due=\"2014-06-01T00:00:00\" />",
-            "</assessments>",
-            "<rubric>",
-                "<prompt>Test prompt</prompt>",
-                "<criterion>",
-                    "<name>Test criterion</name>",
-                    "<prompt>Test criterion prompt</prompt>",
-                    "<option points=\"0\"><name>No</name><explanation>No explanation</explanation></option>",
-                    "<option points=\"2\"><name>Yes</name><explanation>Yes explanation</explanation></option>",
-                "</criterion>",
-            "</rubric>",
-            "</openassessment>"
-        ]
-    },
-
-    "leaderboard_num_negative": {
-        "xml": [
-            "<openassessment leaderboard_show=\"-1\">",
-            "<title>Foo</title>",
-            "<assessments>",
-                "<assessment name=\"peer-assessment\" start=\"2014-02-27T09:46:28\" due=\"2014-03-01T00:00:00\" must_grade=\"5\" must_be_graded_by=\"3\" />",
-                "<assessment name=\"self-assessment\" start=\"2014-04-01T00:00:00\" due=\"2014-06-01T00:00:00\" />",
-            "</assessments>",
-            "<rubric>",
-                "<prompt>Test prompt</prompt>",
-                "<criterion>",
-                    "<name>Test criterion</name>",
-                    "<prompt>Test criterion prompt</prompt>",
-                    "<option points=\"0\"><name>No</name><explanation>No explanation</explanation></option>",
-                    "<option points=\"2\"><name>Yes</name><explanation>Yes explanation</explanation></option>",
-                "</criterion>",
-            "</rubric>",
-            "</openassessment>"
-        ]
-    },
-
-    "leaderboard_num_too_high": {
-        "xml": [
-            "<openassessment leaderboard_show=\"101\">",
-            "<title>Foo</title>",
-            "<assessments>",
-                "<assessment name=\"peer-assessment\" start=\"2014-02-27T09:46:28\" due=\"2014-03-01T00:00:00\" must_grade=\"5\" must_be_graded_by=\"3\" />",
-                "<assessment name=\"self-assessment\" start=\"2014-04-01T00:00:00\" due=\"2014-06-01T00:00:00\" />",
-            "</assessments>",
-            "<rubric>",
-                "<prompt>Test prompt</prompt>",
-                "<criterion>",
-                    "<name>Test criterion</name>",
-                    "<prompt>Test criterion prompt</prompt>",
-                    "<option points=\"0\"><name>No</name><explanation>No explanation</explanation></option>",
-                    "<option points=\"2\"><name>Yes</name><explanation>Yes explanation</explanation></option>",
-                "</criterion>",
-            "</rubric>",
-            "</openassessment>"
-        ]
-    },
-
     "leaderboard_num_not_integer": {
         "xml": [
             "<openassessment leaderboard_show=\"not_an_int\">",

openassessment/xblock/test/data/update_xblock.json

@@ -31,6 +31,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "peer-assessment",
@@ -80,6 +81,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "ɯʎ uǝʍ ʇıʇןǝ",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "peer-assessment",
@@ -129,6 +131,7 @@
         "submission_start": "4014-02-10T09:46",
         "title": "My new title.",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "assessments": [
             {
                 "name": "student-training",
@@ -189,6 +192,7 @@
         "submission_due": "4014-02-27T09:46",
         "submission_start": "4014-02-10T09:46",
         "allow_file_upload": false,
+        "leaderboard_show": 0,
         "title": "My new title.",
         "assessments": [
             {

openassessment/xblock/test/test_studio.py

@@ -22,6 +22,7 @@ class StudioViewTest(XBlockHandlerTestCase):
         "submission_start": "4014-02-10T09:46",
         "submission_due": "4014-02-27T09:46",
         "allow_file_upload": False,
+        "leaderboard_show": 4,
         "assessments": [{"name": "self-assessment"}],
         "editor_assessments_order": [
             "student-training",
@@ -127,6 +128,11 @@ class StudioViewTest(XBlockHandlerTestCase):
         self.assertTrue(resp['success'], msg=resp.get('msg'))
 
     @scenario('data/basic_scenario.xml')
+    def test_include_leaderboard_in_editor(self, xblock):
+        xblock.leaderboard_show = 15
+        self.assertEqual(xblock.editor_context()['leaderboard_show'], 15)
+
+    @scenario('data/basic_scenario.xml')
     def test_update_editor_context_saves_assessment_order(self, xblock):
         # Update the XBlock with a different editor assessment order
         data = copy.deepcopy(self.UPDATE_EDITOR_DATA)
@@ -140,6 +146,7 @@ class StudioViewTest(XBlockHandlerTestCase):
         self.assertTrue(resp['success'], msg=resp.get('msg'))
         self.assertEqual(xblock.editor_assessments_order, data['editor_assessments_order'])
 
+
     @scenario('data/basic_scenario.xml')
     def test_update_editor_context_saves_assessment_order_with_ai(self, xblock):
         # Update the XBlock with a different editor assessment order
@@ -159,6 +166,15 @@ class StudioViewTest(XBlockHandlerTestCase):
         self.assertTrue(resp['success'], msg=resp.get('msg'))
         self.assertEqual(xblock.editor_assessments_order, data['editor_assessments_order'])
 
+    @scenario('data/basic_scenario.xml')
+    def test_update_editor_context_saves_leaderboard(self, xblock):
+        data = copy.deepcopy(self.UPDATE_EDITOR_DATA)
+        data['leaderboard_show'] = 42
+        xblock.published_date = None
+        resp = self.request(xblock, 'update_editor_context', json.dumps(data), response_format='json')
+        self.assertTrue(resp['success'], msg=resp.get('msg'))
+        self.assertEqual(xblock.leaderboard_show, 42)
+
     @file_data('data/invalid_update_xblock.json')
     @scenario('data/basic_scenario.xml')
     def test_update_context_invalid_request_data(self, xblock, data):

openassessment/xblock/test/test_validation.py

@@ -334,3 +334,31 @@ class ValidationIntegrationTest(TestCase):
         is_valid, msg = self.validator(mutated_rubric, no_example_based)
         self.assertTrue(is_valid)
         self.assertEqual(msg, u'')
+
+    def test_leaderboard_num_validation(self):
+        self._assert_leaderboard_num_valid(-1, False)
+        self._assert_leaderboard_num_valid(0, True)
+        self._assert_leaderboard_num_valid(1, True)
+        self._assert_leaderboard_num_valid(100, True)
+        self._assert_leaderboard_num_valid(101, False)
+        self._assert_leaderboard_num_valid(102, False)
+
+    def _assert_leaderboard_num_valid(self, num, expected_is_valid):
+        """
+        Check that the leaderboard number is either valid or invalid.
+
+        Args:
+            num (int): The leaderboard number to check
+            expected_is_valid (bool): Whether the number is valid or invalid.
+
+        Raises:
+            AssertionError
+
+        """
+        is_valid, msg = self.validator(self.RUBRIC, self.ASSESSMENTS, num)
+        if expected_is_valid:
+            self.assertTrue(is_valid, msg="Leaderboard num {num} should be valid".format(num=num))
+            self.assertEqual(msg, '')
+        else:
+            self.assertFalse(is_valid, msg="Leaderboard num {num} should be invalid".format(num=num))
+            self.assertEqual(msg, 'Leaderboard number is invalid.')

openassessment/xblock/validation.py

@@ -2,6 +2,7 @@
 Validate changes to an XBlock before it is updated.
 """
 from collections import Counter
+from submissions.api import MAX_TOP_SUBMISSIONS
 from openassessment.assessment.serializers import rubric_from_dict, InvalidRubric
 from openassessment.assessment.api.student_training import validate_training_examples
 from openassessment.xblock.resolve_dates import resolve_dates, DateValidationError, InvalidDateFormat
@@ -316,7 +317,7 @@ def validator(oa_block, _, strict_post_release=True):
         callable, of a form that can be passed to `update_from_xml`.
     """
 
-    def _inner(rubric_dict, assessments, submission_start=None, submission_due=None):
+    def _inner(rubric_dict, assessments, leaderboard_show=0, submission_start=None, submission_due=None):
 
         is_released = strict_post_release and oa_block.is_released()
 
@@ -348,6 +349,10 @@ def validator(oa_block, _, strict_post_release=True):
         if not success:
             return (False, msg)
 
+        # Leaderboard
+        if leaderboard_show < 0 or leaderboard_show > MAX_TOP_SUBMISSIONS:
+            return (False, _("Leaderboard number is invalid."))
+
         # Success!
         return (True, u'')
 

openassessment/xblock/xml.py

@@ -6,7 +6,6 @@ import lxml.etree as etree
 import pytz
 import dateutil.parser
 import defusedxml.ElementTree as safe_etree
-from submissions.api import MAX_TOP_SUBMISSIONS
 
 
 class UpdateFromXmlError(Exception):
@@ -755,13 +754,6 @@ def parse_from_xml(root):
     if 'leaderboard_show' in root.attrib:
         try:
             leaderboard_show = int(root.attrib['leaderboard_show'])
-            if leaderboard_show < 1:
-                raise UpdateFromXmlError('The leaderboard must have a positive integer value.')
-            if leaderboard_show > MAX_TOP_SUBMISSIONS:
-                msg = 'The number of leaderboard scores must be less than {max_num}'.format(
-                    max_num=MAX_TOP_SUBMISSIONS
-                )
-                raise UpdateFromXmlError(msg)
         except (TypeError, ValueError):
             raise UpdateFromXmlError('The leaderboard must have an integer value.')