[ADD] sale: added product as a kit feature

product_kit/__init__.py

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+from . import models
+from . import wizards

product_kit/__manifest__.py

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+{
+    'name': "product_kit",
+    'version': '1.0',
+    'license': 'LGPL-3',
+    'depends': ['sale_management'],
+    'author': "Kalpan Desai",
+    'category': 'Sales/Sales',
+    'description': """
+        Module specifically designed to manage product as kits in Odoo.
+    """,
+    'installable': True,
+    'application': True,
+    'data': [
+        'views/product_views.xml',
+        'wizards/sub_product_wizard_view.xml',
+        'views/sale_order_view.xml',
+        'views/sale_portal_view.xml',
+        'security/ir.model.access.csv',
+    ],
+}

product_kit/models/__init__.py

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+from . import sale_order_line
+from . import product_template
+from . import sale_order
+from . import sale_invoice

product_kit/models/product_template.py

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+from odoo import fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    is_kit = fields.Boolean(string='Is Kit', help='Check this box if the product is a kit that contains other products.', default=False)
+
+    kit_product_ids = fields.Many2many('product.product', string='Sub Products', help='Products included in this kit.')

product_kit/models/sale_invoice.py

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+from odoo import fields, models
+
+
+class AccountMove(models.Model):
+    _inherit = 'account.move'
+
+    is_printable_kit = fields.Boolean(string="Show Sub-Products", default=True)

product_kit/models/sale_order.py

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+from odoo import api, fields, models
+
+
+class SaleOrder(models.Model):
+    _inherit = "sale.order"
+
+    is_printable_kit = fields.Boolean(
+        string="Print Kit in Report",
+        default=False,
+        help="If checked, kit products will be printed in the report."
+    )
+
+    has_kit = fields.Boolean(
+        string="Has Kit Product",
+        compute="_compute_has_kit",
+        store=True,
+        default=False,
+    )
+
+    @api.depends('order_line', 'order_line.is_kit')
+    def _compute_has_kit(self):
+        for order in self:
+            order.has_kit = any(line.is_kit for line in order.order_line)
+
+    def _prepare_invoice(self):
+        """
+        Prepare the dict of values to create the new invoice for a sales order.
+        """
+        invoice_vals = super()._prepare_invoice()
+        # Copy the value of your toggle to the invoice
+        invoice_vals['is_printable_kit'] = self.is_printable_kit
+        return invoice_vals
+
+    def _create_invoices(self, grouped=False, final=False, date=None):
+        # First, create the invoice(s) using the standard Odoo method.
+        # This will include lines for the main product and all sub-products.
+        invoices = super()._create_invoices(grouped, final, date)
+
+        # Now, loop through the newly created invoices to apply your logic
+        for invoice in invoices:
+            # Check the toggle copied from the Sale Order
+            if not invoice.is_printable_kit:
+
+                # Find all invoice lines that came from a sale order line
+                # marked as a sub-product.
+                sub_product_invoice_lines = invoice.invoice_line_ids.filtered(
+                    lambda line: line.sale_line_ids and line.sale_line_ids[0].is_subproduct
+                )
+
+                # If any sub-product lines were found, delete them
+                if sub_product_invoice_lines:
+                    sub_product_invoice_lines.unlink()
+
+        return invoices

product_kit/models/sale_order_line.py

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+from odoo import fields, models
+from odoo.exceptions import UserError
+
+
+class SaleOrderLine(models.Model):
+    _inherit = "sale.order.line"
+
+    is_kit = fields.Boolean(related="product_template_id.is_kit")
+    parent_product_id = fields.Many2one('product.product')
+    is_subproduct = fields.Boolean(default=False)
+
+    def unlink(self):
+        """
+        Override unlink to also delete sub-product lines when a kit line is deleted.
+        It also prevents the direct deletion of a sub-product line.
+        """
+        # Prevent direct deletion of sub-product lines.
+        sub_product_lines = self.filtered('is_subproduct')
+        if sub_product_lines:
+            # Find the parent kit lines for these sub-products
+            parent_lines = self.env['sale.order.line'].search([
+                ('order_id', 'in', sub_product_lines.mapped('order_id').ids),
+                ('product_id', 'in', sub_product_lines.mapped('parent_product_id').ids),
+                ('is_kit', '=', True)
+            ])
+            # If any of the required parent lines are not in the current deletion set, raise an error.
+            if parent_lines - self:
+                raise UserError("You cannot delete a component of a kit directly. Please remove the main kit product instead.")
+
+        # Cascade delete: find all sub-products of kits being deleted.
+        sub_products_to_delete = self.env['sale.order.line']
+        for line in self.filtered('is_kit'):
+            sub_products_to_delete |= self.search([
+                ('order_id', '=', line.order_id.id),
+                ('parent_product_id', '=', line.product_id.id),
+                ('is_subproduct', '=', True)
+            ])
+
+        all_records_to_delete = self | sub_products_to_delete
+        return super(SaleOrderLine, all_records_to_delete).unlink()

product_kit/report/sale_order_report_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <template id="sale_order_report_inherit" inherit_id="sale.report_saleorder_document">
+        <xpath expr="//tbody/t/tr" position="attributes">
+            <attribute name="t-if">(sale_order.is_printable_kit and line.is_subproduct) or not line.is_subproduct</attribute>
+        </xpath>
+    </template>
+</odoo>

product_kit/security/ir.model.access.csv

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+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+access_subproduct,access_subproduct,model_product_kit_subproduct_wizard,base.group_user,1,1,1,1
+access_subproduct_line,access_subproduct_line,model_product_kit_subproduct_line,base.group_user,1,1,1,1

product_kit/views/product_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="product_template_form_view_kit" model="ir.ui.view">
+        <field name="name">product.template.form.kit</field>
+        <field name="model">product.template</field>
+        <field name="inherit_id" ref="product.product_template_form_view"/>
+        <field name="arch" type="xml">
+            <xpath expr="//page[@name='general_information']//field[@name='company_id']" position="after">
+                <field name="is_kit" />
+                <field name="kit_product_ids" invisible="not is_kit" widget="many2many_tags" />
+            </xpath>
+        </field>
+    </record>
+</odoo>

product_kit/views/sale_order_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="sale_order_form_view" model="ir.ui.view">
+        <field name="name">sale.order.form.view.kit</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="product_template_id"]' position="after">
+                <button type="action" name="product_kit.action_subproduct_wizard" string="Products" class="btn btn-primary" invisible="not is_kit or state == 'sale'"
+                context="{'default_product_id': product_id, 'default_order_line_id': id}" save="false"/>
+            </xpath>
+
+            <xpath expr="//field[@name='order_line']/list" position="attributes">
+                <attribute name="decoration-warning">is_subproduct</attribute>
+            </xpath>
+
+            <xpath expr="//field[@name='order_line']/list/field[@name='product_uom_qty']" position="attributes">
+                <attribute name="readonly">is_subproduct</attribute>
+            </xpath>
+
+            <xpath expr="//field[@name='order_line']/list/field[@name='price_unit']" position="attributes">
+                <attribute name="readonly">is_subproduct</attribute>
+            </xpath>
+            <xpath expr="//field[@name='order_line']/list/field[@name='tax_id']" position="attributes">
+                <attribute name="readonly">is_subproduct</attribute>
+            </xpath>
+            <xpath expr="//field[@name='payment_term_id']" position="after">
+                <field name="has_kit" invisible="1"/>
+                <field name="is_printable_kit" readonly="has_kit == False"/>
+            </xpath>
+        </field>
+    </record>
+</odoo>

product_kit/views/sale_portal_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <template id="sale_order_portal_content_inherited" inherit_id="sale.sale_order_portal_content">
+        <xpath expr="//tbody[hasclass('sale_tbody')]/t[@t-as='line']" position="attributes">
+                <attribute name="t-if">(sale_order.is_printable_kit and line.is_subproduct) or not line.is_subproduct</attribute>
+            </xpath>
+    </template>
+</odoo>

product_kit/wizards/__init__.py

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+from . import sub_product_wizard
+from . import sub_product_wizard_line

product_kit/wizards/sub_product_wizard.py

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+from odoo import api, fields, models
+
+
+class SubproductWizard(models.TransientModel):
+    _name = 'product_kit.subproduct.wizard'
+    _description = 'Sub-product Wizard'
+
+    product_id = fields.Many2one('product.product', string="Product", required=True)
+    sub_product_ids = fields.One2many('product_kit.subproduct.line', 'subproduct_line_id')
+    order_line_id = fields.Many2one('sale.order.line')
+
+    @api.model
+    def default_get(self, fields):
+        res = super().default_get(fields)
+
+        product_id = self.env.context.get('default_product_id')
+        order_line_id = self.env.context.get('default_order_line_id')
+        product = self.env['product.product'].browse(product_id)
+        sub_products = self.env['product_kit.subproduct.wizard'].search(
+            [('order_line_id', '=', order_line_id),
+            ('product_id', '=', product_id)],
+            order='id desc', limit=1)
+
+        sub_products_list = []
+
+        if sub_products.exists():
+            # Update wizard data
+            for subproduct, selected_product in zip(sub_products.sub_product_ids, product.kit_product_ids):
+                sub_products_list.append((0, 0, {
+                        'product_id': selected_product.id,
+                        'sub_product_name': selected_product.product_tmpl_id.name,
+                        'quantity': subproduct.quantity,
+                        'unit_price': subproduct.unit_price
+                    }))
+        else:
+            # New Data
+            for selected_product in product.kit_product_ids:
+                sub_products_list.append((0, 0, {
+                        'product_id': selected_product.id,
+                        'sub_product_name': selected_product.product_tmpl_id.name,
+                        'quantity': 1.0,
+                        'unit_price': selected_product.list_price,
+                    }))
+
+        res['sub_product_ids'] = sub_products_list
+        return res
+
+    def action_confirm_subproduct(self):
+        order_line = self.env['sale.order.line'].search([('id', '=', self.order_line_id.id)])
+
+        # Explicitly ensure the main parent product line is NOT a sub-product.
+        # This is the key to fixing your invoice issue.
+        order_line.write({
+            'is_subproduct': False,
+            'is_kit': True,  # Recommended: also set a flag that it IS a kit
+        })
+
+        product = self.env['product.product'].browse(self.product_id.id)
+        order_line_subproduct = self.env['sale.order.line'].search(
+            [('order_id', '=', order_line.order_id.id),
+            ('parent_product_id', '=', self.product_id.id)])
+
+        total = 0
+        if order_line_subproduct.exists():
+            # Update Order-line
+            for sub_product_data, order_line_rec in zip(self.sub_product_ids, order_line_subproduct):
+                total += (sub_product_data.unit_price * sub_product_data.quantity)
+
+                order_line_rec.product_uom_qty = sub_product_data.quantity
+                order_line_rec.price_unit = 0
+        else:
+            # Create Order-line
+            for sub_product_data, selected_products in zip(self.sub_product_ids, product.kit_product_ids):
+                total += (sub_product_data.unit_price * sub_product_data.quantity)
+
+                self.env['sale.order.line'].create({
+                    'order_id': order_line.order_id.id,
+                    'product_id': selected_products.id,
+                    'name': selected_products.product_tmpl_id.name,
+                    'price_unit': 0,
+                    'product_uom_qty': sub_product_data.quantity,
+                    'parent_product_id': self.product_id.id,
+                    'is_subproduct': True,  # This part is correct
+                    'is_kit': False,
+                    'sequence': order_line.sequence
+                })
+
+        # Update the total price on the main line
+        order_line.price_unit = total + product.product_tmpl_id.list_price

product_kit/wizards/sub_product_wizard_line.py

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+from odoo import fields, models
+
+
+class SubproductWizardLine(models.TransientModel):
+    _name = 'product_kit.subproduct.line'
+    _description = 'Sub-product Wizard Line'
+
+    subproduct_line_id = fields.Many2one('product_kit.subproduct.wizard')
+    product_id = fields.Many2one('product.product')
+    sub_product_name = fields.Char(string="Product Name")
+    quantity = fields.Integer(string="Quantity")
+    unit_price = fields.Float(string="Unit Price")

product_kit/wizards/sub_product_wizard_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="action_subproduct_wizard" model="ir.actions.act_window">
+        <field name="name">Sub-Products-Wizard</field>
+        <field name="res_model">product_kit.subproduct.wizard</field>
+        <field name="view_mode">form</field>
+        <field name="target">new</field>
+    </record>
+
+    <record id="action_subproduct_wizard_view" model="ir.ui.view">
+        <field name="name">Sub-Products-Wizard</field>
+        <field name="model">product_kit.subproduct.wizard</field>
+        <field name="arch" type="xml">
+            <form string="Subproduct">
+                <group>
+                    <field name="product_id" readonly="1"/>
+                    <field name="sub_product_ids">
+                        <list editable="bottom" create="false" delete="false">
+                            <field name="sub_product_name" readonly="1"/>
+                            <field name="quantity"/>
+                            <field name="unit_price"/>
+                        </list>
+                    </field>
+                </group>
+                <footer>
+                    <button type="object" name="action_confirm_subproduct" string="Confirm" class="btn-primary" />
+                    <button string="Close" class="btn-secondary" special="cancel"/>
+                </footer>
+            </form>
+        </field>
+    </record>
+</odoo>