Why on_change method with one2many parameter return ids instead of value?

Bug #1427347 reported by Randy
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Odoo Web Client

Bug Description

I have two module, one parent and one child modules. Parent module have one2many field to child module. I put on_change method in the one2many field with parameter is the field itself.

In on_change method(.py file) when creating new line in one2many field, the parameter looks like


Then, I save the module, and try to edit the one2many field.

It give me


with xx and xy are id's of child.

My question is, when I change some value in child's field, how can parent know the changed value in child's field.

I already tried to browse the record of xx, and xy. It gives me the old value stored in db.

Someone pls enlighten me! Odoo-8.0

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