import EmptyValidation from "./EmptyValidation";
                        
                        /**
                         * Validate duplication across siblings of the record. Pass type = 4 to get this.
                         *
                         * @class EmberColumnData.DuplicateAcrossRecordsValidation
                         * @extends EmberColumnData.EmptyValidation
                         * @module ember-column-data
                         * @submodule ember-column-data-validation
                         */
                        export default EmptyValidation.extend({
                          /**
                           * Path relative to record to check duplication under.
                           *
                           * @property duplicateCheckPath
                           * @type String
                           */
                          duplicateCheckPath : "",
                        
                          /**
                           * Key in the object to check duplicate for.
                           *
                           * @property duplicateCheckKey
                           * @type String
                           */
                          duplicateCheckKey : "id",
                        
                          validateValue : function(value, record) {
                            var invalid = false, negate = this.get("negate"),
                                arr = record.get(this.get("duplicateCheckPath")),
                                values = arr && arr.filterBy(this.get("duplicateCheckKey"), value);
                            invalid = values && (values.get("length") > 1 || (values.get("length") === 1 && values[0] !== record));
                            invalid = (negate && !invalid) || (!negate && invalid);
                            return [invalid, this.get("invalidMessage")];
                          },
                        });