fix

odex25_purchase/purchase_requisition_custom/models/purchase_requisition_custom.py

@@ -233,7 +233,7 @@ class PurchaseRequisitionCustom(models.Model):
             raise ValidationError(_("Please add Committe Members"))
 
     def action_approve(self):
-        purchase_orders = self.env['purchase.order'].search([('requisition_id', '=', self.id)])
+        purchase_orders = self.env['purchase.order'].search([('requisition_id', '=', self.id),('state','=','to approve')])
         po_order_approval = self.env.company.po_double_validation == 'two_step'
         for po_id in purchase_orders:
             # Deal with double validation process for first approve

odex25_purchase/purchase_requisition_custom/views/purchase_requisition_custom.xml

@@ -112,7 +112,7 @@
                           '|', ('state','in',['sign','purchase','to approve','done',
                             'cancel','budget_rejected','wait_for_send','waiting']), ('is_signed', '=', True)]}"
                             string="Sign"/>
-                     <button type="object" name="action_approve_po" string="Confirm" class="oe_highlight"
+                    <button type="object" name="action_approve_po" string="Confirm Purchase" class="oe_highlight"
                             attrs="{'invisible':['|',('requisition_id','=',False),'|',('state','not in',('to approve')),('is_purchase_budget','=',False)]}"/>
                     <button type="object" name="action_select" groups="purchase_requisition_custom.committe_member"
                             attrs="{'invisible':[('state','in',['wait','draft','done','purchase','wait_for_send','sent','waiting','cancel'])]}"
@@ -131,6 +131,9 @@
                             groups="purchase_requisition_custom.group_skip_purchase_budget"/>
                     <!--                    <button name="button_draft" states="cancel" string="Set to Draft" type="object"/>-->
                 </xpath>
+                <xpath expr="//button[@name='button_approve']" position="replace">
+                    <button name="button_approve" type="object" attrs="{'invisible':['|',('requisition_id','!=',False),('state','not in',('to approve'))]}"  string="Approve Order" class="oe_highlight" groups="purchase.group_purchase_manager"/>
+                </xpath>
 
                 <xpath expr="//button[@name='button_draft']" position="after">