Improved CourseRun admin

ECOM-5195

course_discovery/apps/course_metadata/admin.py

@@ -27,10 +27,13 @@ class CourseAdmin(admin.ModelAdmin):
 class CourseRunAdmin(admin.ModelAdmin):
     inlines = (SeatInline,)
     list_display = ('uuid', 'key', 'title',)
-    list_filter = ('course__partner',)
+    list_filter = (
+        'course__partner',
+        ('language', admin.RelatedOnlyFieldListFilter,)
+    )
     ordering = ('key',)
     readonly_fields = ('uuid',)
-    search_fields = ('uuid', 'key', 'title_override', 'course__title',)
+    search_fields = ('uuid', 'key', 'title_override', 'course__title', 'slug',)
 
 
 @admin.register(Program)

course_discovery/apps/ietf_language_tags/models.py

@@ -9,7 +9,7 @@ class LanguageTag(models.Model):
     name = models.CharField(max_length=255)
 
     def __str__(self):
-        return '{code} - {name}'.format(code=self.code, name=self.name)
+        return self.name
 
     @property
     def macrolanguage(self):

course_discovery/apps/ietf_language_tags/tests/test_models.py

@@ -14,7 +14,7 @@ class LanguageTagTests(TestCase):
         code = 'te-st',
         name = 'Test LanguageTag'
         tag = LanguageTag(code=code, name=name)
-        self.assertEqual(str(tag), '{code} - {name}'.format(code=code, name=name))
+        self.assertEqual(str(tag), tag.name)
 
     def test_macrolanguage(self):
         """ Verify the property returns the macrolanguage for a given LanguageTag. """