[ADD] new_product_type: allow configurable kit products

new_product_type/__init__.py

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+from . import models
+from . import wizard

new_product_type/__manifest__.py

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+{
+    "name": "New Product Type",
+    "version": "1.0",
+    'author': "abkus",
+    "depends": ["sale", "product"],
+    "data": [
+        "security/ir.model.access.csv",
+        "views/product_kit_wizard_views.xml",
+        "views/product_views.xml",
+        "views/sale_order_line_views.xml",
+    ],
+    "installable": True,
+    'license': 'LGPL-3',
+}

new_product_type/models/__init__.py

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+from . import product_template
+from . import sale_order_line

new_product_type/models/product_template.py

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+from odoo import fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = "product.template"
+
+    is_kit = fields.Boolean()
+    sub_product_ids = fields.Many2many('product.product')

new_product_type/models/sale_order_line.py

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+from odoo import api, fields, models, _
+from odoo.exceptions import UserError
+
+
+class SaleOrderLine(models.Model):
+    _inherit = "sale.order.line"
+
+    is_kit = fields.Boolean(
+        related="product_id.product_tmpl_id.is_kit",
+        store=True
+    )
+    is_kit_product = fields.Boolean()
+    kit_parent_line_id = fields.Many2one('sale.order.line', ondelete='cascade')
+    extra_price = fields.Float(default=0.0)
+
+    @api.ondelete(at_uninstall=False)
+    def _check_kit_product_restriction(self):
+        for line in self:   
+            if line.is_kit_product:
+                raise UserError(_("You can't direclty delete the sub product"))
+
+    def action_open_kit_wizard(self):
+        return {
+            "type": "ir.actions.act_window",
+            "name": "Configure Kit",
+            "res_model": "product.kit.wizard",
+            "view_mode": "form",
+            "target": "new",
+            "context": {
+                "active_id": self.id
+            },
+        }

new_product_type/security/ir.model.access.csv

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+id,name,model_id:id,group_id:id,perm_read,perm_create,perm_write,perm_unlink
+access_product_wizard_kit_line,access_product_wizard_kit_line,model_product_wizard_kit_line,base.group_user,1,1,1,1
+access_product_kit_wizard,access_product_kit_wizard,model_product_kit_wizard,base.group_user,1,1,1,1

new_product_type/views/product_kit_wizard_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <record id="product_kit_wizard_form" model="ir.ui.view">
+        <field name="name">product.kit.wizard.form</field>
+        <field name="model">product.kit.wizard</field>
+        <field name="arch" type="xml">
+            <form string="Configure Kit">
+                <sheet>
+                    <group>
+                        <field name="main_product_id" readonly="1" class="fw-bold"/>
+                    </group>
+                    <separator string="Sub Products"/>
+                    <field name="line_ids" nolabel="1">
+                        <list editable="bottom" create="false" class="table table-sm">
+                            <field name="product_id" readonly="1" optional="show" force_save="1"/>
+                            <field name="quantity" widget="float" sum="Total quantity"/>
+                            <field name="price" widget="float"/>
+                            <field name="price_subtotal" string="Total Amount" sum="Grand Total"/>
+                        </list>
+                    </field>
+                </sheet>
+            </form>
+        </field>
+    </record>
+</odoo>

new_product_type/views/product_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <record id="product_template_view_form" model="ir.ui.view">
+        <field name="name">product.template.view_form</field>
+        <field name="model">product.template</field>
+        <field name="inherit_id" ref="product.product_template_only_form_view" />
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='invoice_policy']" position="after">
+                <field name="is_kit" />
+            </xpath>
+            <xpath expr="//field[@name='is_kit']" position="after">
+                <field name="sub_product_ids" widgets="many2many_tags"
+                    options="{'no_create': True}" invisible="not is_kit" />
+            </xpath>
+        </field>
+    </record>
+</odoo>

new_product_type/views/sale_order_line_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <record id="sale_order_line_form_view" model="ir.ui.view">
+        <field name="name">sale.order.line.form.view</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_order_form" />
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='order_line']/list" position="attributes">
+                <attribute name="decoration-warning">is_kit_product</attribute>
+            </xpath>
+            <xpath expr="//field[@name='product_template_id']" position="after">
+                <button name="action_open_kit_wizard"
+                    type="object"
+                    string="Configure Kit"
+                    class="btn-primary"
+                    invisible="not is_kit or state!='draft'" />
+            </xpath>
+        </field>
+    </record>
+</odoo>

new_product_type/wizard/__init__.py

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+from . import product_kit_wizard_line
+from . import product_kit_wizard

new_product_type/wizard/product_kit_wizard.py

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+from odoo import api, fields, models
+
+
+class ProductKitWizard(models.TransientModel):
+    _name = "product.kit.wizard"
+    _description = "Sub Product Kit Wizard"
+
+    main_product_id = fields.Many2one(
+        'product.product',
+        string="Product",
+    )
+    sale_line_id = fields.Many2one('sale.order.line')
+    line_ids = fields.One2many(
+        'product.wizard.kit.line',
+        'wizard_id',
+        string="Sub Product"
+    )
+
+    @api.model
+    def _default_get(self, fields_list):
+        res = super().default_get(fields_list)
+
+        sale_line = self.env['sale.order.line'].browse(
+            self.env.context.get('active_id')
+        )
+        if not sale_line.product_id:
+            return res
+        order = sale_line.order_id
+        product = sale_line.product_id
+        lines = []
+
+        for sub_product in product.product_tmpl_id.sub_product:
+            existing_line = order.order_line.filtered(
+                lambda l:
+                l.product_id == sub_product
+                and l.kit_parent_line_id == sale_line
+            )[:1]
+
+            lines.append(
+                (0, 0, {
+                    "product_id": sub_product.id,
+                    "quantity": (
+                        existing_line.product_uom_qty
+                        if existing_line else 1.0
+                    ),
+                    "price": (
+                        existing_line.extra_price
+                        if existing_line else sub_product.lst_price
+                    ),
+                })
+            )
+
+        res.update({
+            "sale_line_id": sale_line.id,
+            "main_product_id": product.id,
+            "line_ids": lines,
+        })
+
+        return res

new_product_type/wizard/product_kit_wizard_line.py

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+from odoo import api, fields, models
+
+
+class ProductKitWizardLine(models.TransientModel):
+    _name = "product.wizard.kit.line"
+    _description = "Kit Wizard Line"
+
+    wizard_id = fields.Many2one('product.kit.wizard')
+    product_id = fields.Many2one(
+        'product.product',
+        readonly=True
+    )
+    quantity = fields.Float(default=1.0)
+    price = fields.Float()
+    price_subtotal = fields.Float(
+        string="Total Amount",
+        compute="_check_total_price",
+        store=True
+    )
+
+    @api.depends('quantity', 'price')
+    def _check_total_price(self):
+        for line in self:
+            line.price_subtotal = line.quantity * line.price