小编Dor*_*ler的帖子

控制器行动:

def deleteDept = {

        def departmentInstance = Department.findByName(params.department.name)

        if (!departmentInstance) {
            println "no dept instance"
            throw new org.codehaus.groovy.grails.exceptions.NewInstanceCreationException ("could not create DeptInstance for ${params.department.name}")
        } else if (departmentInstance.paySvcs && !departmentInstance.paySvcs.isEmpty()){
            println "instance with paySvcs"
            // !!!! do not delete the department if it has payment services !!!!
            departmentInstance.errors.reject('department.do.not.delete.message')
//            render(view: "editDept", model: [departmentInstance: departmentInstance])
            redirect(action: "editDept", id: departmentInstance.id)
        } else{
            println "proceed to delete"
            try {
                departmentInstance.delete(flush: true)
                flash.message = "${message(code: 'default.deleted.message', args: [message(code: 'department.label', default: 'Department'), departmentInstance.name])}"
                redirect(action: …