I m trying to change stores of dijit/form/select on fly. For that purpose, I need to retrieve a store from server. I need to save this store in some temporary store, and make changes to temporary store in my code.
In my code below, requiredStore has the data received from server. I need to create a new temporary store, in my case temporaryStore, that can be assiged data in requiredStore.(instead of temporaryStore being a reference to requiredStore)So that, when I remove/change values in temporaryStore, requiredStore is not affected. The following is the code, I have used.
function getDropDownContents() {
require([
"dojo/store/Memory",
"dijit/form/Select",
"dojo/data/ObjectStore",
"dojo/request",
"dojo/domReady!"
],
function (Memory, Select, ObjectStore, request) {
var os;
var def = new dojo.Deferred();
dojo.xhrGet({
url: "pageToGetValues.aspx",
handleAs: "json",
load: function (res) {
requiredStore = new Memory({ data: res });
temporaryStore = requiredStore;
getOptionsToSelect('dropdown1');
var select = dijit.byId('dropdown1');
select.on('change', function (evt) {
getOptionsToSelect('dropdown2');
});
myFormDialog.show();
}
});
});
}
But, I don't know, what javaScript principles I m not following, coz , when I m changing temporaryStore, requiredStore is also getting changed.
You need to either do a deep clone of requiredStore (going through properties and prototype to create a perfect duplicate), or else just create a different memory store altogether:
requiredStore = new Memory({ data:res });
temporaryStore = new Memory({ data: res });
I don't know why you wouldn't use this approach, but if you want to do a deep clone this question will help:
What is the most efficient way to deep clone an object in JavaScript?
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