s_packaging_calculator: include units when units only on demand

stock_packaging_calculator/models/product.py

@@ -153,11 +153,16 @@ class Product(models.Model):
             "barcode": packaging.barcode,
         }
 
-    def product_qty_by_packaging_as_str(self, prod_qty, include_total_units=False):
+    def product_qty_by_packaging_as_str(
+        self, prod_qty, include_total_units=False, only_packaging=False
+    ):
         """Return a string representing the qty of each packaging.
 
         :param prod_qty: the qty of current product to translate to pkg qty
         :param include_total_units: includes total qty required initially
+        :param only_packaging: exclude units if you have only units.
+            IOW: if the qty does not match any packaging and this flag is true
+            you'll get an empty string instead of `N units`.
         """
         self.ensure_one()
         if not prod_qty:
@@ -191,8 +196,8 @@ class Product(models.Model):
             if bit:
                 as_string.append(bit)
         # Restore unit information if any.
-        # Skip it if we get only units in the count.
-        if unit_qty and not has_only_units:
+        include_units = (has_only_units and not only_packaging) or not has_only_units
+        if unit_qty and include_units:
             as_string.append(f"{unit_qty} {self.uom_id.name}")
         # We want to avoid line break here as this string
         # can be used by reports

stock_packaging_calculator/models/product_qty_by_packaging_mixin.py

@@ -27,10 +27,11 @@ class ProductQtyByPackagingMixin(models.AbstractModel):
             depends.append(self._qty_by_pkg__qty_field_name)
         return depends
 
-    @api.depends_context("lang", "qty_by_pkg_total_units")
+    @api.depends_context("lang", "qty_by_pkg_total_units", "qty_by_pkg_only_packaging")
     @api.depends(lambda self: self._product_qty_by_packaging_display_depends())
     def _compute_product_qty_by_packaging_display(self):
         include_total_units = self.env.context.get("qty_by_pkg_total_units", False)
+        only_packaging = self.env.context.get("qty_by_pkg_only_packaging", False)
         for record in self:
             value = ""
             product = record._qty_by_packaging_get_product()
@@ -38,6 +39,7 @@ class ProductQtyByPackagingMixin(models.AbstractModel):
                 value = product.product_qty_by_packaging_as_str(
                     record._qty_by_packaging_get_qty(),
                     include_total_units=include_total_units,
+                    only_packaging=only_packaging,
                 )
             record.product_qty_by_packaging_display = value
 

stock_packaging_calculator/tests/test_pkg_qty_str.py

@@ -5,7 +5,10 @@ from .common import TestCommon
 
 class TestAsStr(TestCommon):
     def test_as_str(self):
-        self.assertEqual(self.product_a.product_qty_by_packaging_as_str(10), "")
+        self.assertEqual(self.product_a.product_qty_by_packaging_as_str(10), "10 Units")
+        self.assertEqual(
+            self.product_a.product_qty_by_packaging_as_str(10, only_packaging=True), ""
+        )
         self.assertEqual(self.product_a.product_qty_by_packaging_as_str(100), "2 Box")
         self.assertEqual(
             self.product_a.product_qty_by_packaging_as_str(250), "1 Big Box,\xa01 Box"
@@ -14,13 +17,18 @@ class TestAsStr(TestCommon):
             self.product_a.product_qty_by_packaging_as_str(255),
             "1 Big Box,\xa01 Box,\xa05 Units",
         )
+        # only_packaging has no impact if we get not only units
+        self.assertEqual(
+            self.product_a.product_qty_by_packaging_as_str(255, only_packaging=True),
+            "1 Big Box,\xa01 Box,\xa05 Units",
+        )
 
     def test_as_str_w_units(self):
         self.assertEqual(
             self.product_a.product_qty_by_packaging_as_str(
                 10, include_total_units=True
             ),
-            "",
+            "10 Units",
         )
         self.assertEqual(
             self.product_a.product_qty_by_packaging_as_str(
@@ -40,6 +48,13 @@ class TestAsStr(TestCommon):
             ),
             "1 Big Box,\xa01 Box,\xa05 Units (255 Units)",
         )
+        # only_packaging has no impact if we get not only units
+        self.assertEqual(
+            self.product_a.product_qty_by_packaging_as_str(
+                255, include_total_units=True, only_packaging=True
+            ),
+            "1 Big Box,\xa01 Box,\xa05 Units (255 Units)",
+        )
 
     def test_as_str_custom_name(self):
         self.assertEqual(