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Bitovi

isMember

  • Edit on GitHub

Return if a record belongs to a query.

queryLogic.isMember(query, record)

Used to tell if the query contains the instance object record.

import {QueryLogic} from "can";

const queryLogic = new QueryLogic();

const checkMember = queryLogic.isMember(
  {filter: {playerId: 5}},
  {id: 5, type: "3pt", playerId: 5, gameId: 7}
);
console.log( checkMember ); //-> true

Use index to know where to insert the record into a list of records.

isMember ignores the query's page values and will return true if the query's filter matches the data. For example, "Zebra" might be the last record if all animals were sorted by name. However, isMember will still return true:

import {QueryLogic} from "can";

const animalQueryLogic = new QueryLogic();

const checkAnimal = animalQueryLogic.isMember(
  {sort: "name", page: {start: 0, end: 0}},
  {id: 1, name: "Zebra"}
);
console.log( checkAnimal ); //-> true

This is a limitation of QueryLogic when used with paginated sets of data.

Parameters

  1. set {Query}:

    A set.

  2. record {Object}:

    A JavaScript object of key-value pairs.

Returns

{Boolean}:

Returns true if record belongs in set and false it not.

Dealing with paginated sets

If you have paginated data, and you would like to build a real-time application that knows if some newly created data belongs within that paginated set, you will need to build a custom real time can-connect behavior.

If you are encountering this problem, please post a question on the forums and Justin will detail how to solve this problem.

CanJS is part of DoneJS. Created and maintained by the core DoneJS team and Bitovi. Currently 6.6.1.

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