[FIX] stock,sale_mrp: Inventory adjustment not possible

1) Create a stockable product > Add some quantities on hand
2) Edit this product > set it as a consumable or service
3) Create an inventory adjustment on all products

Error will raise "Something went wrong! You can only adjust storable products.

This occur because when switching product type the available quantity
was not cleared, so it will get in the next inventory, but only storable
products can have inventory. So the product should to have no
quantity left before switching type

opw-2300478

closes odoo/odoo#55062

X-original-commit: be17e31307070498ba9ac7dc594443730caa7404
Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>
Signed-off-by: agr-odoo <agr-odoo@users.noreply.github.com>

addons/stock/i18n/stock.pot

@@ -784,6 +784,12 @@ msgstr ""
 msgid "Available Quantity"
 msgstr ""
 
+#. module: stock
+#: code:addons/stock/models/product.py:581
+#, python-format
+msgid "Available quantity should be set to zero before changing type"
+msgstr ""
+
 #. module: stock
 #: model:ir.model.fields,field_description:stock.field_stock_move__backorder_id
 #: model:ir.model.fields,field_description:stock.field_stock_picking__backorder_id

addons/stock/models/product.py

@@ -8,6 +8,7 @@ from collections import defaultdict
 from odoo import _, api, fields, models, SUPERUSER_ID
 from odoo.exceptions import UserError
 from odoo.osv import expression
+from odoo.tools import pycompat,float_is_zero
 from odoo.tools.float_utils import float_round
 
 OPERATORS = {
@@ -733,6 +734,8 @@ class ProductTemplate(models.Model):
             ])
             if existing_move_lines:
                 raise UserError(_("You can not change the type of a product that is currently reserved on a stock move. If you need to change the type, you should first unreserve the stock move."))
+        if 'type' in vals and vals['type'] != 'product' and any(p.type == 'product' and not float_is_zero(p.qty_available, precision_rounding=p.uom_id.rounding) for p in self):
+            raise UserError(_("Available quantity should be set to zero before changing type"))
         return super(ProductTemplate, self).write(vals)
 
     # Be aware that the exact same function exists in product.product

addons/stock/tests/test_move.py

@@ -4270,8 +4270,9 @@ class StockMove(SavepointCase):
         self.assertEqual(move1.state, 'assigned')
 
     def test_change_product_type(self):
-        """ Changing type of an existing product will raise a user error if some move
-        are reserved.
+        """ Changing type of an existing product will raise a user error if
+            - some move are reserved
+            - switching from a stockable product when qty_available is not zero
         """
         self.env['stock.quant']._update_available_quantity(self.product, self.stock_location, 10)
         move1 = self.env['stock.move'].create({
@@ -4289,6 +4290,11 @@ class StockMove(SavepointCase):
         with self.assertRaises(UserError):
             self.product.type = 'consu'
         move1._action_cancel()
+
+        with self.assertRaises(UserError):
+            self.product.type = 'consu'
+
+        self.env['stock.quant']._update_available_quantity(self.product, self.stock_location, -self.product.qty_available)
         self.product.type = 'consu'
 
         move2 = self.env['stock.move'].create({