dojo.store.util.SimpleQueryEngine

Authors:Kris Zyp Project owner:Kris Zyp since:V1.6

Contents

• dojo.store.util.SimpleQueryEngine
  • Introduction
  • Examples
  • See Also

Introduction

The SimpleQueryEngine utility provides basic querying functionality for JavaScript objects. The main export of SimpleQueryEngine is a function that can be called with a query (and options optionally) and returns another function that will execute queries against an array. The query can be an object in which case the results are filtered to objects with properties that match the name value pairs provided by the query object. The query can be a function in which case the results are filtered to objects that when passed to the provided function return a truthy value. The query can also be a string, in which case the string is used to lookup up a method on the store that acts as the filter function.

Examples

require(["dojo/store/util/SimpleQueryEngine"],
  function(SimpleQueryEngine){
var someData = [
  {id:1, name:"One"},
  {id:2, name:"Two"}
];
SimpleQueryEngine({name:"One"})(someData) -> // Returns an array with just the first object

SimpleQueryEngine(function(object){
  return object.id > 1;
})(someData) // Returns an array with just the first object

require(["dojo/store/util/SimpleQueryEngine"], function(SimpleQueryEngine){ var someData = [ {id:1, name:"One"}, {id:2, name:"Two"} ]; SimpleQueryEngine({name:"One"})(someData) -> // Returns an array with just the first object SimpleQueryEngine(function(object){ return object.id > 1; })(someData) // Returns an array with just the first object

See Also

The dojo/store/Memory store uses the SimpleQueryEngine for querying. SimpleQueryEngine can also be used with JsonRest store to make it Observable.

dojo/store/Memory

Table of Contents

• dojo.store.util.SimpleQueryEngine
  • Introduction
  • Examples
  • See Also