如何在Odoo的payment.term模型中通过Python获取关联的account.invoice记录ID

Hey there! I get you want to grab the related account.invoice record ID when opening a payment.term form, using Python instead of just XML context. Let's break down how to do this properly in Odoo.

Core Principle #

When you open the payment.term form from an account.invoice record (via the payment_term_id Many2one field), Odoo automatically passes the current invoice's ID in the context as active_id, along with the model name as active_model (which will be account.invoice here). We can leverage this context in Python code.

Step-by-Step Implementation #

First, inherit the account.payment.term model and add your custom methods:

from odoo import models, api

class AccountPaymentTerm(models.Model):
    _inherit = 'account.payment.term'

    @api.model
    def fetch_related_invoice_id(self):
        """Fetch the ID of the related account.invoice record from context"""
        # Extract context values
        active_id = self.env.context.get('active_id')
        active_model = self.env.context.get('active_model')
        
        # Validate we're coming from an account.invoice record
        if active_model == 'account.invoice' and active_id:
            return active_id
        # Return False if no valid invoice found in context
        return False

    @api.model
    def default_get(self, fields):
        """Auto-fetch invoice ID when loading the payment.term form"""
        res = super().default_get(fields)
        
        # Get the related invoice ID
        invoice_id = self.fetch_related_invoice_id()
        if invoice_id:
            # Here you can do whatever you need with the invoice ID:
            # - Store it in a custom field (if you added one to payment.term)
            # - Fetch invoice details to pre-fill payment term values
            # - Log it for debugging
            # Example: If you have a field 'related_invoice_id' on payment.term:
            # res['related_invoice_id'] = invoice_id
            pass
        
        return res

Key Explanations #

1. fetch_related_invoice_id Method:

   • This method pulls active_id and active_model from the current context.
   • We validate active_model to make sure we're actually coming from an account.invoice record (avoids errors if opening payment terms from other menus).

2. default_get Method:

   • Odoo calls this method when loading a form to set default values.
   • We use it here to automatically fetch the invoice ID as soon as the payment term form opens, so you can use it for any pre-processing or data retrieval.

Usage Notes #

• This will only work when opening the payment.term form directly from an account.invoice record. If you open payment terms from the main menu or another model, active_id won't correspond to an invoice.
• If you need to use the invoice ID in a button action on the payment term form, you can call self.fetch_related_invoice_id() directly in that button's method—since the context stays intact when interacting with the form.

内容的提问来源于stack exchange，提问作者Tessnim