can-query-logic/doc/prototype/member-identity.md

query data

@function can-query-logic.prototype.memberIdentity memberIdentity
@parent can-query-logic.prototype
@hide

@signature `queryLogic.memberIdentity(record)`

  Returns the configured `id` property value from `record`.  If there are
  multiple ids, a `JSON.stringify`-ed JSON object is returned with each
  `id` value is returned.

  ```js
  import {QueryLogic} from "can";

  const todoQueryLogic = new QueryLogic({
      identity: ["_id"]
  });
  const idIdentity = todoQueryLogic.memberIdentity({_id: 5});
  console.log( idIdentity ); //-> 5

  const todoQueryLogic = new QueryLogic({
    identity: ["studentId", "classId"]
  });
  const studentIdentity = todoQueryLogic.memberIdentity({studentId: 6, classId: "7", foo: "bar"});
  console.log(studentIdentity); //-> '{"classId":"7","studentId":6}'
  ```
  @codepen

  @param  {Object} record An instance's raw data.
  @return {*|String} If a single identity property is configured, its value will be returned.
  If multiple identity properties are configured a `JSON.stringify`-ed object is returned.