[ADD] pricelist_price: add book price field based on pricelist

pricelist_price/__init__.py

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+from . import models

pricelist_price/__manifest__.py

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+{
+    'name': 'pricelist_price',
+    'author': 'soham',
+    'version': "1.0",
+    'description': 'Added pricelist price',
+    'depends': ['sale_management'],
+    'license': 'LGPL-3',
+    'data': [
+        'views/account_move_line_view.xml',
+        'views/sale_order_line_view.xml'
+    ],
+    'application': True,
+    'installable': True,
+    'auto-install': True,
+}

pricelist_price/models/__init__.py

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+from . import sale_order_line
+from . import account_move_line

pricelist_price/models/account_move_line.py

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+from odoo import api, fields, models
+
+
+class AccountMoveLine(models.Model):
+    _inherit = "account.move.line"
+
+    book_price = fields.Float(
+        string="Book Price",
+        compute="_compute_book_price",
+        readonly=True
+    )
+
+    @api.depends("sale_line_ids.book_price")
+    def _compute_book_price(self):
+        for line in self:
+            if line.sale_line_ids:
+                line.book_price = line.sale_line_ids[0].book_price
+            else:
+                line.book_price = 0.0

pricelist_price/models/sale_order_line.py

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+from odoo import models, fields, api
+
+
+class SaleOrderLine(models.Model):
+    _inherit = "sale.order.line"
+
+    book_price = fields.Float(compute="_compute_pricelist", readonly=True)
+
+    @api.depends("product_id", "product_uom_qty", "order_id.pricelist_id", "product_template_id.list_price")
+    def _compute_pricelist(self):
+        for record in self:
+            if not record.product_id:
+                record.book_price = 0.0
+            elif not record.order_id.pricelist_id:
+                record.book_price = record.product_template_id.list_price
+            else:
+                record.book_price = record.order_id.pricelist_id._get_product_price(record.product_id, record.product_uom_qty)

pricelist_price/views/account_move_line_view.xml

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+<odoo>
+    <record id="view_move_form" model="ir.ui.view">
+        <field name="name">account.move.view.form.inherit</field>
+        <field name="model">account.move</field>
+        <field name="inherit_id" ref="account.view_move_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='quantity']" position="before">
+                <field name="book_price" invisible="move_type != 'out_invoice'"/>
+            </xpath>
+        </field>
+    </record>
+</odoo>

pricelist_price/views/sale_order_line_view.xml

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+<odoo>
+    <record id="sale_order_from_pricelist" model="ir.ui.view">
+        <field name="name">sale.order.view.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="//list//field[@name='product_uom_qty']" position="before">
+                <field name="book_price"/>
+            </xpath>
+        </field>
+    </record>
+</odoo>