[ADD] values tree view on product attribute

Author: Kev-Roche

product_usability/__manifest__.py

@@ -33,6 +33,7 @@
         'views/product_template_view.xml',
         'views/product_product.xml',
         'views/product_category_view.xml',
+        'views/product_attribute_view.xml',
     ],
     'installable': True,
 }

product_usability/models/__init__.py

@@ -3,3 +3,4 @@
 from . import product_supplierinfo
 from . import product_pricelist
 from . import product_category
+from . import product_attribute

product_usability/models/product_attribute.py

@@ -0,0 +1,27 @@
+# Copyright (C) 2022 Akretion (<http://www.akretion.com>).
+# @author Kévin Roche <kevin.roche@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, fields, models
+
+class ProductAttribute(models.Model):
+    _inherit = "product.attribute"
+
+    values_count = fields.Integer(compute="_compute_values_count")
+
+    @api.depends("value_ids")
+    def _compute_values_count(self):
+        for attr in self:
+            attr.values_count = len(attr.value_ids)
+
+    def show_values_ids(self):
+        return {
+            "name": "Attributes Lines",
+            "type": "ir.actions.act_window",
+            "res_id": self.id,
+            "view_mode": "tree",
+            "res_model": "product.attribute.value",
+            "view_id":self.env.ref("product_usability.product_attribute_value_view_tree").id,
+            "target": "current",
+            "domain": [("id", "in", self.value_ids.ids)],
+        }

product_usability/views/product_attribute_view.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+
+<record id="product_attribute_values_button" model="ir.ui.view">
+    <field name="model">product.attribute</field>
+    <field name="inherit_id" ref="product.product_attribute_view_form" />
+    <field name="arch" type="xml">
+        <group name="main_fields" position='before'>
+            <div class="oe_button_box" name="button_box">
+            <button
+                name="show_values_ids"
+                type="object"
+                class="oe_stat_button"
+                icon="fa-tasks"
+            >
+            <field
+                    name="values_count"
+                    widget="statinfo"
+                    string="Attribute Values"
+                />
+            </button>
+        </div>
+        </group>
+    </field>
+</record>
+
+<record model="ir.ui.view" id="product_attribute_value_view_tree">
+    <field name="name">product.attribute.value.view.tree</field>
+    <field name="model">product.attribute.value</field>
+    <field name="arch" type="xml">
+        <tree string="Attributes Values">
+            <field name="name"/>
+            <field name="is_custom"/>
+        </tree>
+    </field>
+</record>
+
+</odoo>