first commit

__init__.py

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+from . import models

__manifest__.py

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+{
+    'name': 'MRP User Product Restriction',
+    'version': '17.0.1.0.0',
+    'category': 'Manufacturing/Manufacturing',
+    'summary': 'Restrict products in Manufacturing Orders based on user settings',
+    'description': """
+        This module adds a new tab in the User settings form to define allowed products for Manufacturing Orders.
+        If a user has products defined, they can only create MOs for those products.
+        If no products are defined, they cannot create any MOs.
+    """,
+    'author': 'Antigravity',
+    'depends': ['mrp'],
+    'data': [
+        'views/res_users_views.xml',
+        'views/mrp_production_views.xml',
+    ],
+    'installable': True,
+    'application': False,
+    'license': 'LGPL-3',
+}

models/__init__.py

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+from . import res_users
+from . import mrp_production

models/mrp_production.py

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+from odoo import models, fields, api, _
+from odoo.exceptions import ValidationError
+
+class MrpProduction(models.Model):
+    _inherit = 'mrp.production'
+
+    def _get_default_allowed_products(self):
+        return self.env.user.allowed_manufacture_product_ids
+
+    allowed_product_ids = fields.Many2many(
+        'product.product', 
+        compute='_compute_allowed_product_ids',
+        default=_get_default_allowed_products
+    )
+
+    @api.depends_context('uid')
+    def _compute_allowed_product_ids(self):
+        for record in self:
+            record.allowed_product_ids = self.env.user.allowed_manufacture_product_ids
+
+    @api.constrains('product_id')
+    def _check_allowed_product(self):
+        for record in self:
+            # Use sudo() isn't necessary for checking self.env.user, but if we were checking record.user_id it might be.
+            # self.env.user is the current logged in user performing the write/create.
+            user = self.env.user
+            
+            # Check if user has any allowed products
+            # If allowed_manufacture_product_ids is empty, NO products are allowed.
+            if not user.allowed_manufacture_product_ids:
+                 raise ValidationError(_("You are not allowed to manufacture any products. Please contact your administrator."))
+            
+            if record.product_id and record.product_id not in user.allowed_manufacture_product_ids:
+                raise ValidationError(_("You are not allowed to manufacture this product: %s") % record.product_id.name)

models/res_users.py

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+from odoo import models, fields
+
+class ResUsers(models.Model):
+    _inherit = 'res.users'
+
+    allowed_manufacture_product_ids = fields.Many2many(
+        'product.product',
+        'res_users_product_mrp_rel',
+        'user_id',
+        'product_id',
+        string="Allowed Products Manufacture",
+        help="Allowed products for Manufacturing Orders. If empty, no products are allowed."
+    )

views/mrp_production_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="mrp_production_form_view_inherit_restriction" model="ir.ui.view">
+        <field name="name">mrp.production.form.view.inherit.restriction</field>
+        <field name="model">mrp.production</field>
+        <field name="inherit_id" ref="mrp.mrp_production_form_view"/>
+        <field name="arch" type="xml">
+            <field name="product_id" position="before">
+                <field name="allowed_product_ids" invisible="1"/>
+            </field>
+            <field name="product_id" position="attributes">
+                 <attribute name="domain">[('id', 'in', allowed_product_ids)]</attribute>
+            </field>
+        </field>
+    </record>
+</odoo>

views/res_users_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="view_users_form_mrp_restriction" model="ir.ui.view">
+        <field name="name">res.users.form.mrp.restriction</field>
+        <field name="model">res.users</field>
+        <field name="inherit_id" ref="base.view_users_form"/>
+        <field name="arch" type="xml">
+            <notebook position="inside">
+                <page string="Manufacturing Restrictions">
+                    <group>
+                        <field name="allowed_manufacture_product_ids" widget="many2many_tags" options="{'no_create': True}"/>
+                    </group>
+                </page>
+            </notebook>
+        </field>
+    </record>
+</odoo>