[ADD] sales_products_kit: add functionality to sell products as a kit in Sales

sales_products_kit/__init__.py

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+from . import models
+from . import wizard

sales_products_kit/__manifest__.py

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+{
+    "name": "Sales - Product_Kit",
+    "version": "1.0",
+    "description": """
+        This custom module adds a function to Odoo to sell products as a Kit, but not using a BOM or the Manufacturing Module.
+        """,
+    "category": "Sales/Sales",
+    "depends": ["sale_management"],
+    "data": [
+        "security/ir.model.access.csv",
+        "wizard/sub_product_wizard.xml",
+        "views/product_view.xml",
+        "views/sale_order_view.xml",
+        "report/sale_order_report.xml",
+        "views/sale_portal_templates.xml",
+        "report/invoice_report.xml",
+    ],
+    "installable": True,
+    "auto_install": False,
+    "license": "LGPL-3",
+}

sales_products_kit/models/__init__.py

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

sales_products_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()
+    sub_product_ids = fields.Many2many("product.product", string="Sub Product")

sales_products_kit/models/sale_order.py

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+from odoo import models, fields
+
+
+class SaleOrder(models.Model):
+    _inherit = "sale.order"
+
+    print_in_report = fields.Boolean(string="Print in Report ?")

sales_products_kit/models/sale_order_line.py

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+from odoo import models, fields, api
+from odoo.exceptions import UserError
+
+
+class SaleOrderLine(models.Model):
+    _inherit = "sale.order.line"
+
+    is_kit = fields.Boolean(related="product_template_id.is_kit")
+    parent_line_id = fields.Many2one("sale.order.line", ondelete="cascade")
+
+    @api.ondelete(at_uninstall=False)
+    def _ondelete_sale_order_line(self):
+        if not self.parent_line_id:
+            for line in self:
+                sub_product_lines = self.env["sale.order.line"].search(
+                    [("parent_line_id", "=", line.id)]
+                )
+                sub_product_lines.with_context(allow_child_unlink=True).unlink()
+        else:
+            if not self.env.context.get("allow_child_unlink"):
+                raise UserError(
+                    "You cannot delete a child line directly. Please delete the parent line instead."
+                )
+
+    def write(self, vals):
+        if "product_uom_qty" in vals and not self.parent_line_id:
+            for line in self:
+                sub_product_lines = self.env["sale.order.line"].search(
+                    [("parent_line_id", "=", line.id)]
+                )
+                old_qty = line.product_uom_qty
+                for sub_line in sub_product_lines:
+                    if sub_line:
+                        if old_qty != 0:
+                            qty = sub_line.product_uom_qty / old_qty
+                            new_qty = vals["product_uom_qty"] * qty
+                            sub_line.update({"product_uom_qty": new_qty})
+                        else:
+                            new_qty = vals["product_uom_qty"] * sub_line.product_uom_qty
+                            sub_line.update({"product_uom_qty": new_qty})
+        return super().write(vals)
+
+    def action_subproduct(self):
+        return {
+            "type": "ir.actions.act_window",
+            "name": f"Product: {self.product_id.name}",
+            "res_model": "sub.product.wizard",
+            "view_mode": "form",
+            "target": "new",
+            "context": {"default_sale_order_line_id": self.id},
+        }

sales_products_kit/report/invoice_report.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <template id="invoice_document_report_inherited" inherit_id="account.report_invoice_document">
+        <xpath expr="//tbody/t/tr" position="attributes">
+            <attribute name="t-if">line.sale_line_ids.order_id.print_in_report or (not line.sale_line_ids.parent_line_id)</attribute>
+        </xpath>
+    </template>
+
+</odoo>

sales_products_kit/report/sale_order_report.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+    <template id="sale_order_document_report_inherited" inherit_id="sale.report_saleorder_document">
+        <xpath expr="//tbody/t/tr" position="attributes">
+            <attribute name="t-if">doc.print_in_report or (not line.parent_line_id)</attribute>
+        </xpath>
+    </template>
+</odoo>

sales_products_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_sub_product_wizard,access_sub_product_wizard,model_sub_product_wizard,base.group_user,1,1,1,1
+access_sub_product_line,access_sub_product_line,model_sub_product_line,base.group_user,1,1,1,1

sales_products_kit/tests/__init__.py

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+from . import test_subproduct

sales_products_kit/tests/test_subproduct.py

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+from odoo.tests import TransactionCase
+
+
+class TestSubProdcut(TransactionCase):
+    def setUp(self):
+        childproduct1 = self.env["product.template"].create({"name": "Child1"})
+        childproduct2 = self.env["product.template"].create({"name": "Child2"})
+        self.product1 = self.env["product.product"].search(
+            [("product_tmpl_id", "=", childproduct1.id)]
+        )
+        self.product2 = self.env["product.product"].search(
+            [("product_tmpl_id", "=", childproduct2.id)]
+        )
+
+        parentproduct = self.env["product.template"].create(
+            {
+                "name": "parent",
+                "is_kit": True,
+                "sub_product_ids": [self.product1.id, self.product2.id],
+            }
+        )
+        self.parent_product = self.env["product.product"].search(
+            [("product_tmpl_id", "=", parentproduct.id)]
+        )
+
+        sale_order = self.env["sale.order"].create(
+            {
+                "partner_id": self.env.ref("base.partner_demo").id,
+            }
+        )
+        self.parentline = self.env["sale.order.line"].create(
+            {
+                "product_id": self.parent_product.id,
+                "order_id": sale_order.id,
+                "product_uom_qty": 1,
+                "name": self.parent_product.name,
+            }
+        )
+        self.childline1 = self.env["sale.order.line"].create(
+            {
+                "product_template_id": self.product1.id,
+                "order_id": sale_order.id,
+                "product_uom_qty": 3,
+                "parent_line_id": self.parentline.id,
+                "name": self.product1.name,
+            }
+        )
+        self.childline2 = self.env["sale.order.line"].create(
+            {
+                "product_template_id": self.product2.id,
+                "order_id": sale_order.id,
+                "product_uom_qty": 2,
+                "parent_line_id": self.parentline.id,
+                "name": self.product2.name,
+            }
+        )
+
+    def test_parent_quantity_update_child(self):
+        old_parent_qty = self.parentline.product_uom_qty
+        old_child_qty1 = self.childline1.product_uom_qty
+        old_child_qty2 = self.childline2.product_uom_qty
+
+        new_parent_qty = 4
+        self.parentline.write({"product_uom_qty": new_parent_qty})
+
+        new_child_qty1 = (old_child_qty1 / old_parent_qty) * new_parent_qty
+        new_child_qty2 = (old_child_qty2 / old_parent_qty) * new_parent_qty
+
+        self.assertEqual(
+            self.childline1.product_uom_qty,
+            new_child_qty1,
+            f"expected {new_child_qty1}, but got {self.childline1.product_uom_qty}",
+        )
+        self.assertEqual(
+            self.childline2.product_uom_qty,
+            new_child_qty2,
+            f"expected {new_child_qty2}, but got {self.childline2.product_uom_qty}",
+        )

sales_products_kit/views/product_view.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+
+    <record id="product_template_form_view_inherit" model="ir.ui.view">
+        <field name="name">product.template.form.view.inherit.sales_products_kit</field>
+        <field name="model">product.template</field>
+        <field name="inherit_id" ref="sale.product_template_form_view" />
+        <field name="arch" type="xml">
+            <xpath expr="//group[@name='group_general']" position="inside">
+                <field name="is_kit"></field>
+                <field name="sub_product_ids" widget="many2many_tags" invisible="not is_kit"></field>
+            </xpath>
+        </field>
+    </record>
+</odoo>

sales_products_kit/views/sale_order_view.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+
+    <record id="view_order_form_inherit" model="ir.ui.view">
+        <field name="name">sale.order.form.inherit</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='payment_term_id']" position="after">
+                <field name="print_in_report" />
+            </xpath>
+            <xpath expr="//field[@name='product_template_id']" position="after">
+                <button class="btn btn-primary" name="action_subproduct" type="object"
+                    string="Add Subproduct" invisible="not is_kit or state == 'sale'" />
+            </xpath>
+
+
+            <xpath expr="//field[@name='order_line']/list/field[@name='product_template_id']"
+                position="attributes">
+                <attribute name="readonly">parent_line_id</attribute>
+            </xpath>
+            <xpath expr="//field[@name='order_line']/list/field[@name='product_id']"
+                position="attributes">
+                <attribute name="readonly">parent_line_id</attribute>
+            </xpath>
+            <xpath expr="//field[@name='order_line']/list/field[@name='product_uom_qty']"
+                position="attributes">
+                <attribute name="readonly">parent_line_id</attribute>
+            </xpath>
+            <xpath expr="//field[@name='order_line']/list/field[@name='customer_lead']"
+                position="attributes">
+                <attribute name="readonly">parent_line_id</attribute>
+            </xpath>
+            <xpath expr="//field[@name='order_line']/list/field[@name='price_unit']"
+                position="attributes">
+                <attribute name="readonly">parent_line_id</attribute>
+            </xpath>
+            <xpath expr="//field[@name='order_line']/list/field[@name='tax_id']"
+                position="attributes">
+                <attribute name="readonly">parent_line_id</attribute>
+            </xpath>
+
+        </field>
+    </record>
+</odoo>

sales_products_kit/views/sale_portal_templates.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/t/tr" position="attributes">
+            <attribute name="t-if">sale_order.print_in_report or (not line.parent_line_id)</attribute>
+        </xpath>
+    </template>
+</odoo>

sales_products_kit/wizard/__init__.py

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+from . import sub_product_wizard
+from . import sub_product_line

sales_products_kit/wizard/sub_product_line.py

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+from odoo import fields, models
+
+
+class SubProductLine(models.TransientModel):
+    _name = "sub.product.line"
+    _description = (
+        "A transient model representing a line item for sub-products in a wizard."
+    )
+
+    product_id = fields.Many2one("product.product", required=True, ondelete="cascade")
+    quantity = fields.Integer(string="Quantity", required=True, default=1)
+    price_unit = fields.Float(string="Unit Price", required=True)
+    sub_product_wizard_id = fields.Many2one(
+        "sub.product.wizard", required=True, ondelete="cascade"
+    )

sales_products_kit/wizard/sub_product_wizard.py

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+from odoo import fields, models, api, Command
+from odoo.exceptions import UserError
+
+
+class SubProductWizard(models.TransientModel):
+    _name = "sub.product.wizard"
+    _description = "A wizard the display sub-product included in the kit."
+
+    sale_order_line_id = fields.Many2one(
+        "sale.order.line", required=True, ondelete="cascade"
+    )
+    line_ids = fields.One2many(
+        comodel_name="sub.product.line",
+        inverse_name="sub_product_wizard_id",
+        string="Sub Products",
+        required=True,
+    )
+
+    @api.model
+    def default_get(self, fields):
+        defaults = super().default_get(fields)
+        sale_order_line_id = self.env.context.get("default_sale_order_line_id")
+        sale_order_line = self.env["sale.order.line"].browse(sale_order_line_id)
+        product_template = sale_order_line.product_template_id
+        existing_wizard = self.env["sub.product.wizard"].search(
+            [("sale_order_line_id", "=", sale_order_line_id)]
+        )
+
+        if existing_wizard:
+            defaults.update(
+                {
+                    "sale_order_line_id": sale_order_line_id,
+                    "line_ids": existing_wizard.line_ids,
+                }
+            )
+        else:
+            line_data = []
+            for sub_product in product_template.sub_product_ids:
+                line_data.append(
+                    Command.create(
+                        {
+                            "product_id": sub_product.id,
+                            "quantity": 1,
+                            "price_unit": sub_product.lst_price,
+                        }
+                    )
+                )
+
+            defaults.update(
+                {
+                    "sale_order_line_id": sale_order_line_id,
+                    "line_ids": line_data,
+                }
+            )
+        return defaults
+
+    def action_confirm(self):
+        if sum(self.line_ids.mapped("quantity")) == 0:
+            raise UserError(
+                "You must select atleast 1 sub-product to purchase the kit product."
+            )
+
+        lines_to_create = []
+        total_price = 0
+
+        for line in self.line_ids:
+            if line.quantity > 0:
+                existing_line = self.env["sale.order.line"].search(
+                    [
+                        ("order_id", "=", self.sale_order_line_id.order_id.id),
+                        ("product_id", "=", line.product_id.id),
+                        ("parent_line_id", "=", self.sale_order_line_id.id),
+                    ],
+                    limit=1,
+                )
+
+                if existing_line:
+                    existing_line.product_uom_qty = line.quantity
+                    existing_line.price_unit = 0.0
+                else:
+                    lines_to_create.append(
+                        {
+                            "order_id": self.sale_order_line_id.order_id.id,
+                            "product_id": line.product_id.id,
+                            "product_uom_qty": line.quantity,
+                            "price_unit": 0.0,
+                            "parent_line_id": self.sale_order_line_id.id,
+                        }
+                    )
+                total_price += line.quantity * line.price_unit
+
+        if lines_to_create:
+            self.env["sale.order.line"].create(lines_to_create)
+
+        self.sale_order_line_id.price_unit = total_price
+        return True