IndexError: tuple index out of range in an Onchange Function

Question

when I try to run below code i got this error

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File "/home/user/odoo/addons/sale_validation/sale.py", line 708, in on_change_line_product
first_line_rec = self.browse(cr, uid, ids, context=context)[0]
File "/home/user/odoo/openerp/models.py", line 5476, in __getitem__
return self._browse(self.env, (self._ids[key],))
IndexError: tuple index out of range
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class purchase_order_line(osv.osv):
_inherit = 'purchase.or

Baiju KS · Accepted Answer

Hi,
surround your code with this* if* statement. Use like this:-
if ids:
first_line_rec = self.browse(cr, uid, ids, context=context)[0]
You are getting this error when *ids* is empty and you are indexing that empty ids with [0].
Try with above code...
Hope this helps...........

Bipin rathod · Answer

Hello Dep,
Please remove the [0] index from this line.
first_line_rec = self.browse(cr, uid, ids, context=context)[0]
This will not giving you an error, but I didn't get you,what are you trying to do. because of there is no logic to write on change method on line number.
Hope you clear first what you want to do.
Above line will resolve you issue.

vadivel · Answer

Hi Dep,
You can below code:
first_line_rec = self.browse(cr, uid, ids[0], context=context)
for line_rec in first_line_rec.order_id.order_line:
res[line_rec.id] = line_num
line_num += 1
return res

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