Auto Sequence Number for Customer & Vendor by LucidBrainz is a smart and lightweight Odoo 18 module that automatically generates unique sequence numbers for Customers and Vendors at the time of their creation. Managing a large number of business partners becomes easy when each Customer gets a unique identifier like C00001, C00002... and each Vendor gets a unique identifier like V00001, V00002... — all assigned automatically without any manual effort. The module intelligently detects whether a partner is being created as a Customer or a Vendor using Odoo's context mechanism and assigns the appropriate sequence accordingly. The sequence number field is read-only, ensuring data integrity and preventing accidental edits. It is fully visible across all three major views — Form View, List/Tree View, and Kanban View — giving users complete visibility at every level. Built using Odoo's native ir.sequence framework, the module is reliable, conflict-free, and production-ready. The module follows standard Odoo development practices including @api.model_create_multi for Odoo 18 compatibility, proper sequence data with noupdate="1" flag, and clean model inheritance via _inherit. No complex configuration, no setup wizard — simply install the module and sequence numbers start generating instantly. Perfect for businesses that need structured partner identification, client code management, vendor tracking, and organized ERP data from day one.

• Auto Customer Sequence: Unique sequence number (C00001, C00002...) is automatically assigned when a new Customer is created — zero manual effort required.
• Auto Vendor Sequence: Unique sequence number (V00001, V00002...) is automatically assigned when a new Vendor is created — separate series from customers.
• Visible in Form View: Sequence number prominently displayed at the top of the partner form view for instant identification.
• Visible in List/Tree View: "Number" column added in list view allowing easy sorting and scanning of all partners with their sequence numbers.
• Visible in Kanban View: Sequence number shown on each kanban card giving users quick identification in card-based views.
• Read-Only Field: Sequence number is non-editable — prevents accidental changes and ensures data integrity across all records.
• Copy Protection: Sequence number is not duplicated when a partner record is copied — new unique number is generated automatically.
• Odoo 18 Compatible: Uses @api.model_create_multi — fully aligned with Odoo 18 development standards and best practices.
• Native ir.sequence Framework: Built on Odoo's native sequence engine — reliable, conflict-free, and supports concurrent multi-user environments.
• Instant Activation: No setup wizard, no data migration needed — install and sequence numbers start assigning immediately.
• Clean Model Inheritance: Uses standard Odoo _inherit on res.partner — no database conflicts with other customization modules.
• noupdate="1" Safety: Sequence data protected with noupdate="1" flag — sequences won't reset during module upgrades.

Step 1: Install the Module

Install the module from Odoo Apps. Upon installation, two ir.sequence records are automatically created — one for Customers with prefix "C" and padding 5 digits, and one for Vendors with prefix "V" and padding 5 digits. No manual sequence configuration needed.

Step 2: Create a New Customer

Navigate to Sales → Customers → New. The moment you save the record, the system detects default_customer_rank > 0 from the context and automatically calls ir.sequence.next_by_code('res.partner.customer.sequence') to assign the next Customer number like C00001.

Step 3: Create a New Vendor

Navigate to Purchase → Vendors → New. The system detects default_supplier_rank > 0 from the context and automatically calls ir.sequence.next_by_code('res.partner.vendor.sequence') to assign the next Vendor number like V00001.

Step 4: View Sequence Number

The sequence number appears instantly on the Form View at the top, in the List View as the first column titled "Number", and on each Kanban card — giving complete visibility across all views. The field is read-only so no accidental edits are possible.

Step 5: Unique & Permanent

Each sequence number is unique and permanent. If a record is duplicated using Odoo's built-in copy feature, the copy=False attribute ensures the old number is not copied — a fresh new number is assigned automatically upon save.