How to make a field readonly

[Sathwik1]

When an incident task is created then I need to make some fields[one field named test] readonly on incident...how can I achieve it?

and one more condition is.... the same field I had in incident task....even though incident having readonly..if I update something on incident task it needs to update on incident even it is readonly

Note: copying functionality is already written

[SanjivMeher]

You will have to create a onLoad client script and call a GlideAjax to query the incident task table and if a record exists, return true. and make records readonly.

The other option is to make it read only using access control on incident table

[Jaspal Singh · Accepted solution]

Hi Sathwik,

You can use a display business rule & onLoad() client script as below.

1. Display Business rule on Incident table as below

(function executeRule(current, previous /*null when async*/ ) {

        var chkincidentask = new GlideRecord('incident_task');
        chkincidentask.addQuery('parent', current.sys_id); //considering parent field contais child incident number
        chkincidentask.query();
        if (chkincidentask.next()) {
            g_scratchpad.haschild = 'true';
        }
	

})(current, previous);

2. onLoad() client script on Incident table as below.

function onLoad() {
   if(g_scratchpad.haschild=='true')
		{
			alert('yes'); //for check you can comment it
			g_form.setReadOnly('opened_at',true);
			g_form.setReadOnly('description',true); //mention your fields you want to set read-only accordingly

		}
   
}

[Sathwik1]

@Jaspal Singh 

If I make readonly by using above mentioned code...

then If I updated on incident task[Test field] will it get update in incident? 

                 (or)

as it is read only[Test field in incident table] it will not get changed?

Note: copying functionality was already returned 

[Jaspal Singh]

If I make readonly by using above mentioned code...

then If I updated on incident task[Test field] will it get update in incident? 

No, it will still remain read-only. If you closely look it uses simply on-Load client script.

                 (or)

as it is read only[Test field in incident table] it will not get changed?

All depends how are you copying & updating. Ideally, it should work unless you have some field level ACLs configured additionally.