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form OnSave does not trigger in model-driven form

I am at my wits end with this one.  I have a form in my model-driven app with custom scripting and an event handler for the onSave event of the form.  It does not appear to be triggering consistently, if at all. I have the top of the event handler pasted below, where I have a breakpoint set. I can change a field, see the unsaved message, click the Save button, my form will still save and my breakpoint never hits and I never see my notification toast pop up.  I have seen it work before and I know that my mapping to the event handler in the form is correct.  I can't seem to put together what in the event handler could be causing this type of behavior - specifically the fact that it doesn't appear to even fire.

 

Does anyone have any thoughts on what else I can look at?

 

Screenshot 2024-04-17 at 8.21.52 AM.png

 

var Javara = window.Javara || {};

(function () {
    // Define some global variables
    var toastId = "jav_recruitmentToast"; // Define an ID for the notification

    // Code to run in the form OnLoad event
    this.formOnLoad = function (executionContext) {
    ...
    }

    this.formOnSave = function (executionContext) {
        var formContext = executionContext.getFormContext();
        formContext.ui.setFormNotification("SAVING...", "INFO", toastId);
    ...
    }
}).call(Javara);
        

 

 

 

8 REPLIES 8

Hi @mhomol 

 

You must define the toastId, I changed the code a little, it works for me with this change

 

function formOnSave (executionContext) {
  var formContext = executionContext.getFormContext();
  toastId = "INFO"
  formContext.ui.setFormNotification("SAVING...", "INFO",toastId)}

 

Jmanriquerios_0-1713336538728.png

 

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shashankbhide
Continued Contributor
Continued Contributor

what is "this.formOnSave" ?? is this representing the "formContext" ?? you need formContext save async handler, as shown below.

 

https://community.dynamics.com/blogs/post/?postid=c4da8cbe-6d41-ee11-bdf3-00224827e5d4

https://temmyraharjo.wordpress.com/2022/10/15/model-driven-apps-add-on-post-save-event/

 

 

Sorry, I knew I posted too little last night, so apologies.  I have updated the post with more information to denote how the "this" works with my namespace and how I have the events mapped in the form, as well as where my toastId is defined.  

Sorry, I knew I posted too little last night, so apologies.  I have updated the post with more information to denote how the "this" works with my namespace and how I have the events mapped in the form, as well as where my toastId is defined.  

Hi @mhomol 

 

In my previous entry I put the code that works in my environment put formOnSave as the name of the function

 

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a33ik
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Most Valuable Professional

Hello,

I never used and understood how that approach with "call" works. For a while, I have used the following code and it always works fine for me:

var Javara = (function() {
	var toastId = "jav_recruitmentToast"

	function formOnLoad(executionContext) {
		//...
	}

	function formOnSave(executionContext) {
		var formContext = executionContext.getFormContext();
		formContext.ui.setFormNotification("SAVING...", "INFO", toastId);
		//...
	}

	return {
		formOnLoad: formOnLoad,
		formOnSave: formOnSave
	};
})();

 

Hi @mhomol 
Here is a pattern that has worked well for me, imo it makes the code more readable using classes.

 

//File : Javara.js
class Javara {
    constructor(){
        this.toastId = "jav_recruitmentToast";
    }
    
    formOnLoad(executionContext) {
         ....
    }
    
    formOnSave(executionContext) {
       let formContext = exeutionContext.getFormContext();
       formContext.ui.setFormNotification("SAVING...", "INFO", this.toastId);
       ....
    }
}

window.Javara = new Javara();   //This line is important, it instantiates your class

 

Then in the form you will register your save handler like so

 

sudipm_1-1713369841195.png

 

 



So many great responses.  I can't thank everyone enough.  @sudipm , I definitely intend on using that pattern going forward.  That said, I wanted to share what I ended up discovering as the root cause of my issue as I'm kind of curious as to folks thoughts on why it was manifesting the way it was - as in not making it into the event handler at all.

 

The issue was definitely related to my namespace. Later in the formOnSave handler, I had a call to one of my class' functions but was calling it like this: Javara.myMethod(executionContext). As soon as I changed it to this.myMethod(executionContext), everything worked fine and the event handler fired.

 

Essentially, I've learned the following based on the way I have defined my code with the namespace:

  • When calling a helper method from onLoad or onSave, you need to use `this`. If you don't, the event handler simply never fires. So odd....
  • When calling a helper method from a control event handler, like an onChange, you need to use `Javara`. If you don't and instead use `this`, you will get a runtime error about `this` being undefined.

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