modules/purchase/view/purchase_line_form.xml

@@ -19,6 +19,9 @@ this repository contains the full copyright notices and license terms. -->
             <label name="concentration"/>
             <field name="concentration"/>
             <newline/>
+            <label name="attributes"/>
+            <field name="attributes"/>
+            <newline/>
             <label name="del_period"/>
             <field name="del_period"/>
             <label name="period_at"/>

modules/purchase_trade/purchase.py

@@ -2,6 +2,7 @@
 # this repository contains the full copyright notices and license terms.
 from functools import wraps
 from trytond.model import ModelSingleton, ModelSQL, ModelView, fields
+from trytond.i18n import gettext
 from trytond.report import Report
 from trytond.pool import Pool, PoolMeta
 from trytond.pyson import Bool, Eval, Id, If, PYSONEncoder
@@ -483,6 +484,42 @@ class Line(metaclass=PoolMeta):
             })
     premium = fields.Numeric("Premium/Discount",digits='unit')
     fee_ = fields.Many2One('fee.fee',"Fee")
+
+    attributes = fields.Dict('product.attribute', 'Attributes',
+        domain=[
+            ('sets', '=', Eval('product._parent_template', {}).get('attribute_set',
+                    Eval('attribute_set', -1))),
+            ],
+        states={
+            'readonly': (~Eval('attribute_set')
+                & ~Eval('product._parent_template', {}).get('attribute_set')),
+            },
+        depends={'product.template'},
+        help="Add attributes to the variant.")
+    
+    attributes_name = fields.Function(fields.Char(
+            "Attributes Name",
+            states={
+                'invisible': ~Eval('attribute_set'),
+                }),
+        'on_change_with_attributes_name')
+
+    @fields.depends('product', 'attributes')
+    def on_change_with_attributes_name(self, name=None):
+        if not self.product.attribute_set or not self.attributes:
+            return
+
+        def key(attribute):
+            return getattr(attribute, 'sequence', attribute.name)
+
+        values = []
+        for attribute in sorted(self.product.attribute_set.attributes, key=key):
+            if attribute.name in self.attributes:
+                value = self.attributes[attribute.name]
+                values.append(gettext('product_attribute.msg_label_value',
+                        label=attribute.string,
+                        value=attribute.format(value)))
+        return " | ".join(filter(None, values))
     
     @classmethod
     def default_price_type(cls):