X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/19ae770973482257117fe8ded5619c3018c4b60f..9f487917d8c2aa3958473dd1c11dc584485c1229:/services/api/lib/whitelist_update.rb

diff --git a/services/api/lib/whitelist_update.rb b/services/api/lib/whitelist_update.rb
index a81f9924f0..17aed4b48d 100644
--- a/services/api/lib/whitelist_update.rb
+++ b/services/api/lib/whitelist_update.rb
@@ -1,16 +1,31 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
 module WhitelistUpdate
   def check_update_whitelist permitted_fields
     attribute_names.each do |field|
-      if not permitted_fields.include? field.to_sym and self.send((field.to_s + "_changed?").to_sym)
-        errors.add field, "illegal update of field"
+      if !permitted_fields.include?(field.to_sym) && really_changed(field)
+        errors.add field, "cannot be modified in state '#{self.state}' (#{send(field+"_was").inspect}, #{send(field).inspect})"
       end
     end
   end
 
+  def really_changed(attr)
+    return false if !send(attr+"_changed?")
+    old = send(attr+"_was")
+    new = send(attr)
+    if (old.nil? || old == [] || old == {}) && (new.nil? || new == [] || new == {})
+      false
+    else
+      old != new
+    end
+  end
+
   def validate_state_change
     if self.state_changed?
       unless state_transitions[self.state_was].andand.include? self.state
-        errors.add :state, "invalid state change from #{self.state_was} to #{self.state}"
+        errors.add :state, "cannot change from #{self.state_was} to #{self.state}"
         return false
       end
     end