Yes it is. This is a very conventional scenario. On Friday, March 13, 2015 at 2:49:12 AM UTC-4, Yavuz Bogazci wrote: > > Is such a problem not daily business? I mean in real world you have most > of the time a backend in form of a db and in case of angularjs local json > where you bind your your controls. > > Am Freitag, 13. März 2015 02:38:56 UTC+1 schrieb Mo Moadeli: >> >> To repeat, your 'local' model is updated but the actual write to the db >> fails. Question is: How does one set the 'local' model back to what it WAS >> (i.e. how does one keep the local model and db values tightly in sync?). >> >> There is the obvious answer, where you store/deep copy previous state to >> a local variable and restore the model if webservice fails (probably >> through a callback fail of the $http or db call). Here are further >> thoughts from SO: >> >> >> http://stackoverflow.com/questions/16915984/angularjs-restoring-model-value-in-watch-after-failed-update-on-server-side >> >> >> However, if you'd like to be adventurous, look at Angular's built in >> 'rollback' function for the model call ngModelOptions: >> >> https://docs.angularjs.org/api/ng/directive/ngModelOptions >> >> Hope this helps. >> >> On Thursday, March 12, 2015 at 3:44:27 PM UTC-4, Yavuz Bogazci wrote: >>> >>> Hi, >>> >>> i am calling a webservice which returns data in JSON format. I store >>> this into a variable called*myrecipes* and show these through rg-repeat >>> in a grid. This works fine! I have bound the database field to the checkbox >>> through ng-model. This works, too. Now my requirement: >>> >>> I could call a webservice function to update the current item in the >>> database through ng-change. When the call is successfull the model gets >>> updated and the value in the database is updated, too. Everything fine! >>> >>> BUT what if something goes wrong when i try to update the value in the >>> database through the webservice? The model (the local data) is getting >>> updated but the value in the database not! That may not happen! How can i >>> prevent this? How could i perhaps catch a single item which was triggered >>> through the ng-change and set the value in the model back to the previous >>> value? >>> >>>
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