edit api

app/models/client.rb

@@ -1,4 +1,6 @@
 class Client < ApplicationRecord
 	validates :name, presence: { message: "Please enter  client name." }
 	validates :name,  :uniqueness => {:message =>"This client name is already taken." } ,on: :create 
+	validates :location_code ,presence: { message: "Please enter  client location code." }
+	validates :location_code,  :uniqueness => {:message =>"This location code is already taken." } ,on: :create 
 end