How to create Incident and make case as its parent

[Research]

Hi All

Can anyone help me with the requirement 
when we have created a case 
and created one incident how to make case as parent to this incident,

and custom field in incident is mandatory when incident moved to Resolve/ Close
Case can not be closed until child incident closed.

Please help with me script

[SanjivMeher]

There is a parent field out of box on incident field. You can just store the case sysid as parent in the incident.

You should also provide option as a related list under case for users to create incident from the case, which will bydefault make the case parent of the incident.

Then you need a business rule on the incident to abort action when someone is closing the case, if there are open incidents.

[Research]

HI Sanjiv can you help me with script part?

[Sandeep Rajput]

@Research How are you creating incident from case? If there is a UI Action, then you can set inc.parent = current.sys_id+''; in the UI Action script field

Where inc is the GlideRecord object of incident and current is case record.