Sometimes you need to share values between variables in the main form and a Multi Row Variable Set.

Each Multi Row Variable Set has its own instance of g_form that cannot access the data in the main form.

This restriction can be solved by making the main g_form instance available to the MRVS.

The code will differ a bit between the backend and the Service Portal.

Backend

The variable set is opened in a new iFrame.

Accessing the main g_form only requires accessing the parent variable.

For instance, we can create an onLoad Catalog Client Script on the MRVS that gets the value from a variable in the main form and set it in the new row.

if(parent.g_form){
    g_form.setValue('to', parent.g_form.getValue('from'));
}

Service Portal

It is a bit more complicated in Service Portal. The popup is not opened in an iframe, so we will need two steps to achieve the same result.

Making main g_form available

We can set the g_form as a global variable in an onLoad Catalog Client Script in the Catalog Item.

this.my_g_form = g_form;

Note: Set Isolate Script to false.

Accessing g_form from the MRVS

Create an onLoad Catalog Client Script in the MRVS to access the global variable.

if(this.my_g_form){
    g_form.setValue('to', this.my_g_form.getValue('from'));
}

Example

Pre-filling a variable in the MRVS with a value from the main form.

The date selected in the “From” field in the main form is copied to the “To” field in the MRVS.

Warning: Tested in Chrome in New York. Don’t use unless strictly necessary. It might break in future releases.