throw new Error in Alfresco workflow

[irenailievska]

I want to throw error in a custom alfreso workflow, but just as a popup message to the user that he entered something wrong.
I tried to do this

<activiti:taskListener event="complete" class="org.alfresco.repo.workflow.activiti.tasklistener.ScriptTaskListener">
          <activiti:field name="script">
            <activiti:string><![CDATA[
            …………………….
            var message = 'IT LIVES';
            throw message;]]></activiti:string>
          </activiti:field>
        </activiti:taskListener>
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I tried doing this also

…
throw new Error("some text");
…
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Since I am writing here it means it didn't work.
Please can somebody help me?
Just a simple alert window doesn't help me if the user submits the action after all. I need something to stop the user from continuing the process if the data he entered is not correct.

Thanks in advance,
Irena

[irenailievska]

I tried the same thing. I don't know what is wrong. The error that I get is shown on the error.png file that I attached. I don't know. Maybe I need to set something somewhere?
This is very important for my project and I am stuck with this .
Thank you people for trying to help
Irena

[darkredd]

Hi Irena,

Please attach your bpm file so we can plug it into our environment to debug for you.

[irenailievska]

I just removed the throw error part. You can try to put it any where. Can you just tell me if I am supposed to set it somewhere else so I can throw an error? Maybe in some file…
Thank you

[muralidharand]

Hi,
I'm able to see the error message.Refer the attached.

[irenailievska]

But that error is not what I need. I need to have the message (ex."The values you entered are not correct") in the popup instead of the generic code.
This is the problem I have

[muralidharand]

Here I'm throwing error message as "called", you can change this message as per you wish.

<activiti:string><![CDATA[throw new Error ("called");]]></activiti:string>
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to

<activiti:string><![CDATA[throw new Error ("The values you entered are not correct");]]></activiti:string>
‍‍‍

Please let me know, If I understood your question wrongly.

[irenailievska]

Thanks . I would have to manage like this…. I thought that I might be able to have only the message I want instead of org.activiti.engine.ActivitiException: Exception while invoking TaskListener: Exception while invoking TaskListener: 01010014 Failed to execute supplied script: 01010013 Error: The values you entered are not correct .
But I will do it like this.
Thank you and all the others that helped

[muralidharand]

Sadly,you can't get rid out of alfresco / activiti namespace.

[irenailievska]

I have one more issue - I use the way you suggested and it works, but I need to check if a checkbox is checked or not.
So when at the beginning the box is not checked it throws the error as it should, but if I check it after the throwing of the error it still throws the error - like it can't catch the change I made.
Is there some way to catch the change I made?
Thank you

************* EDIT ****************
I found my error - I was checking if the checkbox value was true or false but with 'true' and needed to exclude the single quotes.

[krutik_jayswal]

When alfresco is rendering the workflow form , it is rendering the transition button using the activiti-transition.js file.Basically this buttons are doing nothing more but submitting the workflow form.

This is how the flow is going when we submit a workflow form.

1. activiti-transition is submiting the workflow form.
2. Using a function named as submitForm which resides inside alfresco.js, it is invoking an submit event of form
3. Inside the forms-runtime.js file there is one function named as _submitInvoked(handles the submit event of form), which is responsible for making an ajax call and submitting the workflow form.If there is error while submitting , it will display the error which is from backend.

So the best to customize the error pop up is to change activiti-transition.ftl and activiti-transition.js file , to make an ajax call and handle the response as we want.

activiti-transition.js  file has a function named as onClick: function ActivitiTransitions_onClick(e, p_obj).What it does is , it converts the form element in json object and finally submit that form.Below is line which is responsible for this.

Alfresco.util.submitForm(p_obj.getForm());

Inside this activiti-transition.js  file if we do all this things manually and handle the server response, we will be able to handle the error message ultimately.