parse.com - request.object.previous() is not working in beforeSave() -


i'm trying check current , previous value of attribute in beforesave(). tried use request.object.previous("attribute_name") still returning current changed value. although .ditry() returning true means value changed. idea wrong here ? appreciate feedback.

i think .previous() isn't part of parse.com sdk, inherited backbone.

in beforesave handler, have like:

if(object.dirty("attr")) {     console.log("after: " + object.get("attr") + ", before: " + object.previous("attr")); }

the value returned 'previous' same. functionality implemented? i've seen few threads elsewhere imply it's not - if so, can remove api docs until it's done?

if doesn't work, correct workaround query previous object? or 'changedattributes' work? oh, see 'previous' cruft backbone.

source1

previous method inherited backbone.model. won't return previous value of field in cloud code.

source2

might not answer you're looking for, way workaround lack of .previous implementation this out:

don't know if helpful or if considered costly of workaround, add column object being updated stores previous value of original column. allow access previous value in aftersave function.


Comments

Post a Comment

Popular posts from this blog

javascript - AngularJS custom datepicker directive -

i make custom datepicker directive custom template. but have no idea how start building it... how include date data directive? i appreciate guide or give me advice work on more precisely. it might you! follow below steps html code sample: <label>birth date</label> <input type="text" ng-model="birthdate" date-options="dateoptions" custom-datepicker/> <hr/> <pre>birthdate = {{birthdate}}</pre> <script type="text/ng-template" id="custom-datepicker.html"> <div class="enhanced-datepicker"> <div class="proxied-field-wrap"> <input type="text" ui-date-format="yy-mm-dd" ng-model="ngmodel" ui-date="dateoptions"/> </div> <label> <button class="btn" type="button"><i class="icon-calendar"></i>
Read more

javascript - jQuery date picker - Disable dates after the selection from the first date picker -

<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>jquery ui datepicker - default functionality</title> <link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css"> <script src="//code.jquery.com/jquery-1.10.2.js"></script> <script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script> <link rel="stylesheet" href="/resources/demos/style.css"> <script> $(function () { $("#datepicker1").datepicker(); }); </script> <script> $(function () { $("#datepicker2").datepicker(); }); </script> </head> <body> <p>date 1: <input type="text" id="datepicker1"></p> <p>date 2: <input type="t
Read more