Restrict priority field edit screen and view screen particular group

[HARI KRISHNA AKKAMALA]

we have system field name is "priority".we can restrict the edit option all the user groups view,edit screen level,only sservice people edit the priority field.i get the some code from google.this code is working only edit screen level priority field is read only,view screen level user can do the edit the priority field.could you please share the valuable inputs on my issue. 

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.security.roles.ProjectRoleManager

def projectRoleManager = ComponentAccessor.getComponent(ProjectRoleManager)
def loggedInUser = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()

def usersRoles = projectRoleManager.getProjectRoles(loggedInUser,issueContext.projectObject)*.name
log.warn("usersRoles: " + usersRoles)

// Here you'll replace to your field "Severity"def severityField = getFieldByName("Select List Single Choice A")
log.warn("severityField: " + severityField)

// Here you'll going to replace to your User Role "sservices"if ("Administrators" in usersRoles) {
    severityField.setReadOnly(true)
}

[Tomáš Vrabec]

Hi, how about a simple workaround?

1) Remove priority from edit screen at all.

2) Create independent self-transition called "Change priority"

3) Make a condition for this transition only for particular roles.

4) Include Priority for the transition screen.