Course id clash command

cms/djangoapps/contentstore/management/commands/course_id_clash.py

@@ -0,0 +1,51 @@
+"""
+Script for finding all courses whose org/name pairs == other courses when ignoring case
+"""
+from django.core.management.base import BaseCommand
+from xmodule.modulestore.django import modulestore
+
+
+#
+# To run from command line: ./manage.py cms --settings dev course_id_clash
+#
+class Command(BaseCommand):
+    """
+    Script for finding all courses whose org/name pairs == other courses when ignoring case
+    """
+    help = 'List all courses ids which may collide when ignoring case'
+
+    def handle(self, *args, **options):
+        mstore = modulestore()
+        if hasattr(mstore, 'collection'):
+            map_fn = '''
+                function () {
+                    emit(this._id.org.toLowerCase()+this._id.course.toLowerCase(), {target: this._id});
+                }
+            '''
+            reduce_fn = '''
+                function (idpair, matches) {
+                    var result = {target: []};
+                    matches.forEach(function (match) {
+                        result.target.push(match.target);
+                    });
+                    return result;
+                }
+            '''
+            finalize = '''
+                function(key, reduced) {
+                    if (Array.isArray(reduced.target)) {
+                        return reduced;
+                    }
+                    else {return null;}
+                    }
+            '''
+            results = mstore.collection.map_reduce(
+                map_fn, reduce_fn, {'inline': True}, query={'_id.category': 'course'}, finalize=finalize
+            )
+            results = results.get('results')
+            for entry in results:
+                if entry.get('value') is not None:
+                    print '{:-^40}'.format(entry.get('_id'))
+                    for course_id in entry.get('value').get('target'):
+                        print '   {}/{}/{}'.format(course_id.get('org'), course_id.get('course'), course_id.get('name'))
+

cms/djangoapps/contentstore/management/commands/tests/test_course_id_clash.py

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+import sys
+from StringIO import StringIO
+from django.test import TestCase
+from django.core.management import call_command
+from xmodule.modulestore.tests.factories import CourseFactory
+
+class ClashIdTestCase(TestCase):
+    """
+    Test for course_id_clash.
+    """
+    def test_course_clash(self):
+        """
+        Test for course_id_clash.
+        """
+        expected = []
+        # clashing courses
+        course = CourseFactory.create(org="test", course="courseid", display_name="run1")
+        expected.append(course.location.course_id)
+        course = CourseFactory.create(org="TEST", course="courseid", display_name="RUN12")
+        expected.append(course.location.course_id)
+        course = CourseFactory.create(org="test", course="CourseId", display_name="aRUN123")
+        expected.append(course.location.course_id)
+        # not clashing courses
+        not_expected = []
+        course = CourseFactory.create(org="test", course="course2", display_name="run1")
+        not_expected.append(course.location.course_id)
+        course = CourseFactory.create(org="test1", course="courseid", display_name="run1")
+        not_expected.append(course.location.course_id)
+        course = CourseFactory.create(org="test", course="courseid0", display_name="run1")
+        not_expected.append(course.location.course_id)
+
+        old_stdout = sys.stdout
+        sys.stdout = mystdout = StringIO()
+        call_command('course_id_clash', stdout=mystdout)
+        sys.stdout = old_stdout
+        result = mystdout.getvalue()
+        for courseid in expected:
+            self.assertIn(courseid, result)
+        for courseid in not_expected:
+            self.assertNotIn(courseid, result)