Add product's cost price to plan form, add confirmation message

plan.py

@@ -67,6 +67,9 @@ class Plan(ModelSQL, ModelView):
             digits=(16, DIGITS)),
         'get_products_cost')
     costs = fields.One2Many('product.cost.plan.cost', 'plan', 'Costs')
+    product_cost_price = fields.Function(fields.Numeric('Product Cost Price',
+            digits=(16, DIGITS)),
+        'get_product_cost_price')
     cost_price = fields.Function(fields.Numeric('Unit Cost Price',
             digits=(16, DIGITS)),
         'get_cost_price')
@@ -79,7 +82,7 @@ class Plan(ModelSQL, ModelView):
                 'compute': {
                     'icon': 'tryton-spreadsheet',
                     },
-                'update_product_prices': {
+                'update_product_cost_price': {
                     'icon': 'tryton-refresh',
                     },
                 })
@@ -196,6 +199,9 @@ class Plan(ModelSQL, ModelView):
         digits = self.__class__.products_cost.digits[1]
         return cost.quantize(Decimal(str(10 ** -digits)))
 
+    def get_product_cost_price(self, name):
+        return self.product.cost_price if self.product else None
+
     def get_cost_price(self, name):
         return sum(c.cost for c in self.costs if c.cost)
 
@@ -323,15 +329,15 @@ class Plan(ModelSQL, ModelView):
 
     @classmethod
     @ModelView.button
-    def update_product_prices(cls, plans):
+    def update_product_cost_price(cls, plans):
         for plan in plans:
             if not plan.product:
                 continue
-            plan._update_product_prices()
+            plan._update_product_cost_price()
             plan.product.save()
             plan.product.template.save()
 
-    def _update_product_prices(self):
+    def _update_product_cost_price(self):
         pool = Pool()
         Uom = pool.get('product.uom')
 
@@ -366,8 +372,8 @@ class Plan(ModelSQL, ModelView):
         self.bom = bom
         self.save()
 
-        ProductBOM()
         if self.product.boms:
+            # TODO: create new bom to allow diferent "versions"?
             product_bom = self.product.boms[0]
             if product_bom.bom:
                 self.raise_user_warning('product_already_has_bom%s' % self.id,

plan.xml

@@ -101,13 +101,13 @@
             <field name="group" ref="group_product_cost_plan"/>
         </record>
 
-        <record model="ir.model.button" id="plan_update_product_prices_button">
-            <field name="name">update_product_prices</field>
+        <record model="ir.model.button" id="plan_update_product_cost_price_button">
+            <field name="name">update_product_cost_price</field>
             <field name="model" search="[('model', '=', 'product.cost.plan')]"/>
         </record>
         <record model="ir.model.button-res.group"
-                id="plan_update_product_prices_button_group_product_admin">
-            <field name="button" ref="plan_compute_button"/>
+                id="plan_update_product_cost_price_button_group_product_admin">
+            <field name="button" ref="plan_update_product_cost_price_button"/>
             <field name="group" ref="product.group_product_admin"/>
         </record>
 

view/cost_plan_form.xml

@@ -36,6 +36,9 @@
     </notebook>
     <label name="cost_price"/>
     <field name="cost_price"/>
-    <button name="update_product_prices" string="Update Product's Prices"
-        colspan="2"/>
+    <label name="product_cost_price"/>
+    <field name="product_cost_price"/>
+    <button name="update_product_cost_price"
+        string="Update Product's Cost Price" colspan="2"
+        confirm="It will modify the product's field loosing the current value. Are you sure?"/>
 </form>