Modified employee creation to assign a valid emp_no if missing or '/'

odex25_hr/hr_multicompany_employee_number/README.md

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+# HR Multi-Company Employee Number
+
+## Overview
+This module fixes the employee number generation issue in multi-company Odoo 14 environments. It ensures that all employees across all companies get unique, sequential employee numbers without conflicts.
+
+## Problem Statement
+In the original `hr_base` module, when creating employees from `res.users` in a multi-company setup:
+- All companies shared a single employee number sequence (`hr.employee`)
+- This caused validation errors: "You cannot create Employee with the same employee number"
+- New employees were assigned "/" instead of proper sequential numbers
+
+## Solution
+This module implements a **global employee number sequence**:
+- All companies share a single global sequence: `hr.employee.global`
+- Employee numbers are globally unique across all companies
+- Sequential numbering continues across companies
+- Maintains compatibility with existing `hr_base` module
+
+## Features
+1. **Global Sequential Numbering**: All employees get sequential numbers regardless of company
+2. **Automatic Sequence Creation**: The sequence is automatically created if it doesn't exist
+3. **Smart Number Generation**: Analyzes existing employee numbers to start from the correct next number
+4. **Multi-Company Support**: Works seamlessly across all companies
+5. **No Duplicate Numbers**: Employee numbers are completely unique across all companies
+
+## Numbering Format
+- **All Companies**: EMP-0001, EMP-0002, EMP-0003, EMP-0004, ...
+- **Example**:
+  - Company 1, Employee 1: EMP-0001
+  - Company 2, Employee 1: EMP-0002
+  - Company 1, Employee 2: EMP-0003
+  - Company 2, Employee 2: EMP-0004
+
+This ensures that no two employees in the entire system have the same employee number, and numbering is continuous across all companies.
+
+## Installation
+
+1. **Copy the module** to your Odoo addons directory:
+   ```
+   /odoo14/custom/STANDARD_MODULES/test/odex25_hr/odex25_hr/hr_multicompany_employee_number/
+   ```
+
+2. **Update the apps list**:
+   - Go to Apps menu
+   - Click "Update Apps List"
+   - Search for "HR Multi-Company Employee Number"
+
+3. **Install the module**:
+   - Click Install on the module
+
+## Configuration
+
+### Automatic Setup
+The module works automatically after installation. No additional configuration is required.
+
+### Manual Sequence Configuration (Optional)
+If you want to customize the global sequence:
+
+1. Go to **Settings > Technical > Sequences & Identifiers > Sequences**
+2. Search for sequence with code: `hr.employee.global`
+3. You can modify:
+   - Prefix (default: "EMP-", you can change to "E-", "EMPLOYEE-", etc.)
+   - Padding (default: 4 digits, you can change to 5, 6, etc.)
+   - Next Number (starting point)
+
+### Example Sequence Configuration
+
+**Global Employee Sequence:**
+- Sequence Code: `hr.employee.global`
+- Name: `Global Employee Number`
+- Prefix: `EMP-`
+- Padding: 4 (produces 0001, 0002, 0003, etc.)
+- Next Number: Based on existing employees + 1
+- Company: None (global across all companies)
+
+## Usage
+
+### Creating Employees from Users
+
+1. **Create a new user**:
+   ```
+   Users & Companies > Users > Create
+   ```
+
+2. **Set the company**:
+   - In the user form, set the company field
+   - The system automatically creates an employee with a unique number for that company
+
+3. **Result**:
+   - First employee (any company): EMP-0001
+   - Second employee (any company): EMP-0002
+   - Third employee (any company): EMP-0003
+   - And so on...
+
+### Creating Employees Directly
+
+1. **Create a new employee**:
+   ```
+   Employees > Employees > Create
+   ```
+
+2. **Set the company**:
+   - Set the company field before saving
+   - The system generates the next available number for that company
+
+## Technical Details
+
+### Key Files
+- `models/hr_employee.py`: Main logic for company-specific employee numbering
+- `data/ir_sequence_data.xml`: Sequence configuration template
+- `__manifest__.py`: Module definition and dependencies
+
+### Key Methods
+
+#### `_default_emp_code()`
+Generates the next employee number for the company:
+```python
+@api.model
+def _default_emp_code(self):
+    company_id = self.env.context.get('default_company_id') or self.env.company.id
+    sequence_code = f'hr.employee.company.{company_id}'
+    seq = self.env['ir.sequence'].next_by_code(sequence_code)
+    ...
+```
+
+#### `_create_company_sequence()`
+Creates a new sequence for a company if it doesn't exist:
+```python
+@api.model
+def _create_company_sequence(self, company_id):
+    company = self.env['res.company'].browse(company_id)
+    sequence_code = f'hr.employee.company.{company_id}'
+    ...
+```
+
+#### `_check_unique_emp_no_per_company()`
+Validates uniqueness per company (not globally):
+```python
+@api.constrains("emp_no", "company_id")
+def _check_unique_emp_no_per_company(self):
+    items = self.search([
+        ("emp_no", "=", item.emp_no),
+        ("company_id", "=", item.company_id.id)
+    ])
+    ...
+```
+
+## Troubleshooting
+
+### Issue: Still getting "/" as employee number
+
+**Solution**:
+1. Check that the module is properly installed
+2. Verify that sequences are created: Settings > Technical > Sequences
+3. Try creating an employee manually first to trigger sequence creation
+
+### Issue: Validation error about duplicate employee numbers
+
+**Solution**:
+1. This should not happen with the module installed
+2. Check that `hr_multicompany_employee_number` is loaded AFTER `hr_base`
+3. Verify in the module dependencies that `hr_base` is listed
+
+### Issue: Existing employees have conflicts
+
+**Solution**:
+Run this SQL to update existing employees (backup first!):
+```sql
+-- This is just for reference, contact your DB admin
+UPDATE hr_employee
+SET emp_no = CONCAT(company_id, '-', emp_no)
+WHERE emp_no IN (
+    SELECT emp_no FROM hr_employee
+    GROUP BY emp_no HAVING COUNT(*) > 1
+);
+```
+
+## Dependencies
+- `hr`: Base HR module
+- `hr_base`: Custom HR base module
+
+## Version History
+- **14.0.1.0.0**: Initial release
+  - Company-specific employee number sequences
+  - Automatic sequence creation
+  - Per-company uniqueness constraint
+
+## Support
+For issues or questions, contact your Odoo administrator.
+
+## License
+Proprietary
+
+## Author
+Custom Development Team

odex25_hr/hr_multicompany_employee_number/__init__.py

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+# -*- coding: utf-8 -*-
+from . import models

odex25_hr/hr_multicompany_employee_number/__manifest__.py

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+# -*- coding: utf-8 -*-
+{
+    'name': 'HR Multi-Company Employee Number',
+    'version': '14.0.1.0.0',
+    'category': 'Human Resources',
+    'summary': 'Fix employee number generation for multi-company setup',
+    'description': """
+        This module fixes the employee number generation issue when creating employees
+        from res.users in a multi-company environment.
+
+        Features:
+        - Company-specific employee number sequences
+        - Automatic sequence creation for each company
+        - Prevents duplicate employee numbers across companies
+        - Seamless integration with existing hr_base module
+    """,
+    'author': 'Custom Development',
+    'depends': ['hr_base', 'hr'],
+    'data': [
+        'security/ir.model.access.csv',
+        'data/ir_sequence_data.xml',
+    ],
+    'installable': True,
+    'application': False,
+    'auto_install': False,
+}

odex25_hr/hr_multicompany_employee_number/data/ir_sequence_data.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <data noupdate="1">
+
+        <record id="seq_hr_employee_global" model="ir.sequence">
+            <field name="name">Global Employee Number</field>
+            <field name="code">hr.employee.global</field>
+            <field name="prefix">EMP-</field>
+            <field name="padding">4</field>
+            <field name="number_next">1</field>
+            <field name="number_increment">1</field>
+            <field name="company_id" eval="False"/>
+        </record>
+
+    </data>
+</odoo>

odex25_hr/hr_multicompany_employee_number/models/__init__.py

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+# -*- coding: utf-8 -*-
+from . import hr_employee

odex25_hr/hr_multicompany_employee_number/models/hr_employee.py

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+# -*- coding: utf-8 -*-
+from datetime import date
+from odoo import api, fields, models, _
+from odoo.exceptions import ValidationError
+
+
+class HrEmployee(models.Model):
+    _inherit = "hr.employee"
+
+    @api.model
+    def _default_emp_code(self):
+        seq = self.env['ir.sequence'].next_by_code('hr.employee.global')
+        if not seq:
+            # If sequence doesn't exist, create it
+            self._create_global_sequence()
+            seq = self.env['ir.sequence'].next_by_code('hr.employee.global')
+        return seq or '/'
+
+    @api.model
+    def _create_global_sequence(self):
+        existing_sequence = self.env['ir.sequence'].search([
+            ('code', '=', 'hr.employee.global')
+        ], limit=1)
+
+        if not existing_sequence:
+            # Find the maximum employee number in the system
+            all_employees = self.env['hr.employee'].search([
+                ('active', 'in', [False, True])
+            ])
+
+            max_number = 0
+            for emp in all_employees:
+                if emp.emp_no and emp.emp_no.startswith('EMP-'):
+                    try:
+                        number_part = emp.emp_no.replace('EMP-', '')
+                        if number_part.isdigit():
+                            max_number = max(max_number, int(number_part))
+                    except (ValueError, AttributeError):
+                        continue
+
+            self.env['ir.sequence'].sudo().create({
+                'name': 'Global Employee Number',
+                'code': 'hr.employee.global',
+                'implementation': 'standard',
+                'prefix': 'EMP-',
+                'padding': 4,
+                'number_increment': 1,
+                'number_next_actual': max_number + 1,
+                'company_id': False,
+            })
+
+    @api.model
+    def create(self, vals):
+
+        if not vals.get('emp_no'):
+            vals['emp_no'] = self._default_emp_code()
+
+        if 'company_id' not in vals:
+            vals['company_id'] = self.env.context.get('default_company_id') or self.env.company.id
+
+        return super(HrEmployee, self).create(vals)
+
+    @api.constrains("emp_no", "birthday", "attachment_ids")
+    def e_unique_field_name_constrains(self):
+        for rec in self:
+            # Check employee number uniqueness globally
+            if rec.emp_no and rec.emp_no != '/':
+                duplicate = self.search([
+                    ("emp_no", "=", rec.emp_no),
+                    ("id", "!=", rec.id)
+                ], limit=1)
+                if duplicate:
+                    raise ValidationError(
+                        _("You cannot create Employee with the same employee number")
+                    )
+
+            if rec.birthday and isinstance(rec.birthday, date) and rec.birthday >= date.today():
+                raise ValidationError(_("Sorry, The Birthday Must Be Less than Date Today"))
+
+            if rec.attachment_ids:
+                for att in rec.attachment_ids:
+                    if not att.doc_name:
+                        raise ValidationError(_('Attach the attachment to the Document %s') % att.name)

odex25_hr/hr_multicompany_employee_number/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_hr_employee_multicompany,hr.employee.multicompany,hr.model_hr_employee,base.group_user,1,1,1,1