+
+ def ensure_no_collection_uuids_in_script_params
+ # recursive_hash_search searches recursively through hashes and
+ # arrays in 'thing' for string fields matching regular expression
+ # 'pattern'. Returns true if pattern is found, false otherwise.
+ def recursive_hash_search thing, pattern
+ if thing.is_a? Hash
+ thing.each do |k, v|
+ return true if recursive_hash_search v, pattern
+ end
+ elsif thing.is_a? Array
+ thing.each do |k|
+ return true if recursive_hash_search k, pattern
+ end
+ elsif thing.is_a? String
+ return true if thing.match pattern
+ end
+ false
+ end
+
+ # Fail validation if any script_parameters field includes a string containing a
+ # collection uuid pattern.
+ if self.script_parameters_changed?
+ if recursive_hash_search(self.script_parameters, Collection.uuid_regex)
+ self.errors.add :script_parameters, "must use portable_data_hash instead of collection uuid"
+ return false
+ end
+ end
+ true
+ end