odoo-orm-expert

Overview

This skill teaches you Odoo's Object Relational Mapper (ORM) in depth. It covers reading/writing records, building domain filters, working with relational fields, and avoiding common performance pitfalls like N+1 queries.

When to Use This Skill

• Writing search(), browse(), create(), write(), or unlink() calls.
• Building complex domain filters for views or server actions.
• Implementing computed, stored, and related fields.
• Debugging slow queries or optimizing bulk operations.

How It Works

1. Activate: Mention @odoo-orm-expert and describe what data operation you need.
2. Get Code: Receive correct, idiomatic Odoo ORM code with explanations.
3. Optimize: Ask for performance review on existing ORM code.

Examples

Example 1: Search with Domain Filters

# Find all confirmed sale orders for a specific customer, created this year
import datetime

start_of_year = datetime.date.today().replace(month=1, day=1).strftime('%Y-%m-%d')

orders = self.env['sale.order'].search([
    ('partner_id', '=', partner_id),
    ('state', '=', 'sale'),
    ('date_order', '>=', start_of_year),
], order='date_order desc', limit=50)

# Note: pass dates as 'YYYY-MM-DD' strings in domains,
# NOT as fields.Date objects — the ORM serializes them correctly.

Example 2: Computed Field

total_order_count = fields.Integer(
    string='Total Orders',
    compute='_compute_total_order_count',
    store=True
)

@api.depends('sale_order_ids')
def _compute_total_order_count(self):
    for record in self:
        record.total_order_count = len(record.sale_order_ids)

Example 3: Safe Bulk Write (avoid N+1)

# ✅ GOOD: One query for all records
partners = self.env['res.partner'].search([('country_id', '=', False)])
partners.write({'country_id': self.env.ref('base.us').id})

# ❌ BAD: Triggers a separate query per record
for partner in partners:
    partner.country_id = self.env.ref('base.us').id

Best Practices

• ✅ Do: Use mapped(), filtered(), and sorted() on recordsets instead of Python loops.
• ✅ Do: Use sudo() sparingly and only when you understand the security implications.
• ✅ Do: Prefer search_count() over len(search(...)) when you only need a count.
• ✅ Do: Use with_context(...) to pass context values cleanly rather than modifying self.env.context directly.
• ❌ Don't: Call search() inside a loop — this is the #1 Odoo performance killer.
• ❌ Don't: Use raw SQL unless absolutely necessary; use ORM for all standard operations.
• ❌ Don't: Pass Python datetime/date objects directly into domain tuples — always stringify them as 'YYYY-MM-DD'.

Limitations

• Does not cover cr.execute() raw SQL patterns in depth — use the Odoo performance tuner skill for SQL-level optimization.
• Stored computed fields can cause significant write overhead at scale; this skill does not cover partitioning strategies.
• Does not cover transient models (models.TransientModel) or wizard patterns.
• ORM behavior can differ slightly between Odoo SaaS and On-Premise due to config overrides.