[IMP] Added data tags to option to have values inserted on shipping address change and setting readonly when address is retrieved from database

website_partner_firstname/templates.xml

@@ -1,6 +1,8 @@
 <?xml version="1.0"?>
 <openerp>
 	<data>
+
+		<!-- Add Firstname and Lastname to billing address -->
 		<template id="checkout" inherit_id="website_sale.checkout">
 			 <xpath expr="//input[@name='name']/parent::div" position="replace">
 		          <div t-attf-class="form-group #{error.get('firstname') and 'has-error' or ''} col-lg-6">
@@ -13,16 +15,25 @@
 		          </div>
       		</xpath>
 
+      	<!-- Add Firstname and Lastname to shipping address -->
 			 <xpath expr="//input[@name='shipping_name']/parent::div" position="replace">
 		          <div t-attf-class="form-group #{error.get('shipping_firstname') and 'has-error' or ''} col-lg-6">
 		              <label class="control-label" for="shipping_firstname">First Name</label>
-		              <input type="text" name="shipping_firstname" class="form-control" t-att-value="checkout.get('shipping_firstname')"/>
+		              <input type="text" name="shipping_firstname" class="form-control" t-att-value="checkout.get('shipping_firstname')" t-att-readonly="'readonly' if shipping_id &gt;= 0 else ''"/>
 		          </div>
 		          <div t-attf-class="form-group #{error.get('shipping_lastname') and 'has-error' or ''} col-lg-6">
 		              <label class="control-label" for="shipping_lastname">Last Name</label>
-		              <input type="text" name="shipping_lastname" class="form-control" t-att-value="checkout.get('shipping_lastname')"/>
+		              <input type="text" name="shipping_lastname" class="form-control" t-att-readonly="'readonly' if shipping_id &gt;= 0 else ''" t-att-value="checkout.get('shipping_lastname')"/>
 		          </div>
       		</xpath>
+		
+		<!-- Add Firstname and Lastname data tags to options so frontend onchange picks up values -->
+			<xpath expr="//select[@name='shipping_id']//option[@t-att-value='shipping.id']" position="attributes">
+				<attribute name="t-att-data-shipping_firstname">shipping.firstname</attribute>
+				<attribute name="t-att-data-shipping_lastname">shipping.lastname</attribute>
+			</xpath>
 		</template>
+
+
 	</data>
 </openerp>