Question Re: Copy and store the default model in Technology Q&A

Copy and store the default model

Former Member — Fri, 28 Sep 2018 08:36:18 GMT

Hi, I have a created a default model and when I start my application, I want to copy it to a second model and then use it in a different function to reset everything. Here what I have done, on my InitFunction:

console.log("Data ", data);
copyModel = $.extend({}, data);

Data is my original model. I have declared the copyModel as a global variable.

Then I have the resetFunction:

resetP: function(){
this.getView().setModel(new JSONModel(copyModel));
console.log("CopyModel ", copyModel);
}

The code seems to run, but I have a weird problem. When I first click the reset Button, copyModel is same with the original model (data). The second time I ran the resetFunction, copyModel is not the same with the original. It has been overwritten with the existing one the moment I press the button. Can anyone help me with that? Thank you!

Re: Copy and store the default model

jorge_cabanas — Fri, 28 Sep 2018 09:53:06 GMT

I don't understand really well what are you trying to ask...

But I'm gonna play... I think that the problem is in new JSONModel:

this.getView().setModel(new JSONModel(copyModel));

What is DATA? Json model? oData Model?

Re: Copy and store the default model

Former Member — Fri, 28 Sep 2018 12:46:02 GMT

Yes, data is my original JSON model from a form which is being created when I first open my app. I want to have a copy of this model for using it when I am resetting my form. The problem is that at first I keep a right copy and when I run the reset function for a second time, the copy of the model is changed.

Re: Copy and store the default model

SergioG_TX — Fri, 28 Sep 2018 12:53:06 GMT

try cloning the original object like this instead of the $.extend function

var copyObject = JSON.parse(JSON.stringify(originalObject));

Re: Copy and store the default model

jorge_cabanas — Mon, 01 Oct 2018 06:53:05 GMT

It should work because the pointer is not assigned in this way. So when the original data is modified (whenever), the copy will never be modified.
Good point.

Re: Copy and store the default model

Former Member — Mon, 01 Oct 2018 08:09:52 GMT

Unfortunately, none of these two ways worked. As it's written on Stackoverflow and works for me:

resetP: function(){
this.getView().getModel().updateBindings();
}