Producing server logs to help debug methods

Server logs are helpful when trying to figure out what has been happening at runtime before a crash. They can also be added to provide additional information when debugging an issue. This recipe shows how to add logging to an existing method.

Getting ready

We will add some logging statements to the following method, which saves the stock levels of products to a file:

from os.path import join
from openerp import models, api, exceptions
EXPORTS_DIR = '/srv/exports'

class ProductProduct(models.Model):
    _inherit = 'product.product'
    @api.model
    def export_stock_level(self, stock_location):
        products = self.with_context(
            location=stock_location.id
        ).search([])
        products = products.filtered('qty_available')
        fname = join(EXPORTS_DIR, 'stock_level.txt')
        try:
            with open(fname, 'w') as fobj:
                for prod in products:
                    fobj.write('%s\t%f\n' % (prod.name,
 ...