Add field from server to set custom error messages for logistration fields

common/djangoapps/user_api/helpers.py

@@ -125,7 +125,7 @@ class FormDescription(object):
     def add_field(
         self, name, label=u"", field_type=u"text", default=u"",
         placeholder=u"", instructions=u"", required=True, restrictions=None,
-        options=None
+        options=None, error_messages=None
     ):
         """Add a field to the form description.
 
@@ -158,6 +158,11 @@ class FormDescription(object):
                 and `display_name` is the name to display to the user.
                 If the field type is "select", you *must* provide this kwarg.
 
+            error_messages (dict): Custom validation error messages.
+                Currently, the only supported key is "required" indicating
+                that the messages should be displayed if the user does
+                not provide a value for a required field.
+
         Raises:
             InvalidFieldError
 
@@ -177,7 +182,8 @@ class FormDescription(object):
             "placeholder": placeholder,
             "instructions": instructions,
             "required": required,
-            "restrictions": {}
+            "restrictions": {},
+            "errorMessages": {},
         }
 
         if field_type == "select":
@@ -201,6 +207,9 @@ class FormDescription(object):
                     )
                     raise InvalidFieldError(msg)
 
+        if error_messages is not None:
+            field_dict["errorMessages"] = error_messages
+
         # If there are overrides for this field, apply them now.
         # Any field property can be overwritten (for example, the default value or placeholder)
         field_dict.update(self._field_overrides.get(name, {}))
@@ -228,6 +237,7 @@ class FormDescription(object):
                         {"value": "wine", "name": "Wine"}
                     ]
                     "restrictions": {},
+                    "errorMessages": {},
                 },
                 {
                     "name": "comments",
@@ -240,6 +250,7 @@ class FormDescription(object):
                     "restrictions": {
                         "max_length": 200
                     }
+                    "errorMessages": {},
                 },
                 ...
             ]

common/djangoapps/user_api/tests/test_helpers.py

@@ -87,6 +87,9 @@ class FormDescriptionTest(TestCase):
             restrictions={
                 "min_length": 2,
                 "max_length": 10
+            },
+            error_messages={
+                "required": "You must provide a value!"
             }
         )
 
@@ -105,6 +108,9 @@ class FormDescriptionTest(TestCase):
                     "restrictions": {
                         "min_length": 2,
                         "max_length": 10,
+                    },
+                    "errorMessages": {
+                        "required": "You must provide a value!"
                     }
                 }
             ]

common/djangoapps/user_api/views.py

@@ -377,37 +377,41 @@ class RegistrationView(APIView):
             # Translators: This is a legal document users must agree to in order to register a new account.
             terms_text = _(u"Terms of Service and Honor Code")
 
-        # Translators: "Terms of service" is a legal document users must agree to in order to register a new account.
-        label = _(
-            u"I agree to the {terms_of_service}"
-        ).format(
-            terms_of_service=u"<a href=\"{url}\">{terms_text}</a>".format(
-                url=marketing_link("HONOR"),
-                terms_text=terms_text
-            )
+        terms_link = u"<a href=\"{url}\">{terms_text}</a>".format(
+            url=marketing_link("HONOR"),
+            terms_text=terms_text
         )
 
+        # Translators: "Terms of service" is a legal document users must agree to in order to register a new account.
+        label = _(u"I agree to the {terms_of_service}").format(terms_of_service=terms_link)
+
+        # Translators: "Terms of service" is a legal document users must agree to in order to register a new account.
+        error_msg = _(u"You must agree to the {terms_of_service}").format(terms_of_service=terms_link)
+
         form_desc.add_field(
             "honor_code",
             label=label,
             field_type="checkbox",
             default=False,
             required=required,
+            error_messages={
+                "required": error_msg
+            }
         )
 
     def _add_terms_of_service_field(self, form_desc, required=True):
         # Translators: This is a legal document users must agree to in order to register a new account.
         terms_text = _(u"Terms of Service")
+        terms_link = u"<a href=\"{url}\">{terms_text}</a>".format(
+            url=marketing_link("TOS"),
+            terms_text=terms_text
+        )
 
         # Translators: "Terms of service" is a legal document users must agree to in order to register a new account.
-        label = _(
-            u"I agree to the {terms_of_service}"
-        ).format(
-            terms_of_service=u"<a href=\"{url}\">{terms_text}</a>".format(
-                url=marketing_link("TOS"),
-                terms_text=terms_text
-            )
-        )
+        label = _(u"I agree to the {terms_of_service}").format(terms_of_service=terms_link)
+
+        # Translators: "Terms of service" is a legal document users must agree to in order to register a new account.
+        error_msg = _("You must agree to the {terms_of_service}").format(terms_of_service=terms_link)
 
         form_desc.add_field(
             "terms_of_service",
@@ -415,6 +419,9 @@ class RegistrationView(APIView):
             field_type="checkbox",
             default=False,
             required=required,
+            error_messages={
+                "required": error_msg
+            }
         )
 
     def _options_with_default(self, options):