How can set the priority level get assigned automatically on Category?

[Ruhi Tanwar]

While creating a support ticket (in Atlassian support) there is no option for the person seeking support to select an appropriate priority level according to self. The priority level gets assigned automatically.
I want to apply the same automation to the JSD Project.
Kindly provide a solution to how can I update the priority level on the ticket category.

[Brant Schroeder]

@Ruhi Tanwar 

On the request type, you can add a priority, hide it and set it.  This way all request types of that type would have the same priority.  If the category is a custom field and they are selecting it, you could automation on issue create to set the priority.