add production

__init__.py

@@ -1,5 +1,5 @@
 from trytond.pool import Pool
-from . import product, sale
+from . import product, sale, production
 
 __all__ = ['register']
 
@@ -9,6 +9,7 @@ def register():
         product.Product,
         sale.Sale,
         sale.Line,
+        production.Production,
         module='sale_fast_food', type_='model')
     Pool.register(
         module='sale_fast_food', type_='wizard')

product.py

@@ -1,5 +1,6 @@
 from trytond.pool import Pool, PoolMeta
 from trytond.model import fields
+from trytond.pyson import Eval, Bool
 
 
 class Product(metaclass=PoolMeta):
@@ -8,4 +9,5 @@ class Product(metaclass=PoolMeta):
 
     pizza = fields.Boolean("Pizza")
     pizza_topping = fields.Boolean("Topping Pizza")
-    boms = fields.Many2One('production.bom', "Boms")
+    boms = fields.Many2One('production.bom', "Boms",
+                           states={'required': Eval('producible', True)})

production.py

@@ -0,0 +1,63 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+from decimal import Decimal
+
+from trytond.pool import Pool, PoolMeta
+from trytond.model import fields
+from trytond.modules.product import price_digits, round_price
+
+from trytond.exceptions import UserError
+
+
+BOM_CHANGES = ['bom', 'product', 'quantity', 'uom', 'warehouse', 'location',
+               'company', 'inputs', 'outputs']
+
+class Production(metaclass=PoolMeta):
+    "Production"
+    __name__ = 'production'
+
+
+    @fields.depends(*BOM_CHANGES)
+    def explode_bom(self):
+        pool = Pool()
+        Uom = pool.get('product.uom')
+        if not (self.bom and self.product and self.uom):
+            return
+
+        factor = self.bom.compute_factor(self.product, self.quantity or 0,
+            self.uom)
+
+        inputs = []
+        for input_ in self.bom.inputs:
+            if input_.product.producible:
+                for input_ in input_.product.template.boms.inputs:
+                    quantity = input_.compute_quantity(factor)
+                    move = self._explode_move_values(
+                        self.picking_location, self.location, self.company,
+                        input_, quantity)
+                    if move:
+                        inputs.append(move)
+                        quantity = Uom.compute_qty(input_.uom, quantity,
+                                                   input_.product.default_uom, round=False)
+            else:
+                raise UserError(str('problemas'))
+                quantity = input_.compute_quantity(factor)
+                move = self._explode_move_values(
+                    self.picking_location, self.location, self.company,
+                    input_, quantity)
+                if move:
+                    inputs.append(move)
+                    quantity = Uom.compute_qty(input_.uom, quantity,
+                        input_.product.default_uom, round=False)
+        self.inputs = inputs
+
+        outputs = []
+        for output in self.bom.outputs:
+            quantity = output.compute_quantity(factor)
+            move = self._explode_move_values(
+                self.location, self.output_location, self.company, output,
+                quantity)
+            if move:
+                move.unit_price = Decimal(0)
+                outputs.append(move)
+        self.outputs = outputs

sale.py

@@ -44,3 +44,10 @@ class Line(metaclass=PoolMeta):
         super(Line, self).on_change_product()
         if self.product.pizza:
             self.pizza = self.sale.pizza_number
+
+    def get_production(self):  
+        "Return production for the sale line"
+        Production = super(Line, self).get_production()
+        #Production.bom = self.product.template.boms.id
+
+        return Production