Odoo 8.0 : write on related fields

Question

Is it possible to have writable related field ? I tried by adding a 'reverse' parameter in my field definition and having the reverse method writing the value in related field. However, in the view, the field is always readonly. Here is my code:
gift_instructions = fields.Char(
related='invoice_line_id.gift_instructions', store=True,
inverse='_set_gift_instructions')
@api.one
def _set_gift_instructions(self):
self.invoice_line_id.gift_instructions = self.gift_instructions

PY · Accepted Answer

How about a computed field instead ?
You already have your setter function, you just need to create your getter function:
@api.depends('invoice_line_id')
def _get_gift_instructions(self):
self.gift_instructions = self.invoice_line_id.gift_instructions and link it:
gift_instructions = fields.Char(
compute='_get_gift_instructions', store=True,
inverse='_set_gift_instructions'

Atchuthan - Technical Consultant, Sodexis Inc · Answer

For a related field, when we change the field at form view, it automatically changes the relational model too
i.e. No need to use reverse to write at gift_instructions and it will be automatically done by the Object-relational mapping(ORM).
Check whether you have set the gift_instructions field as *readonly at XML form view*.
For more info check the odoo documentation here [1] .

[1] http://odoo-new-api-guide-line.readthedocs.org/en/latest/fields.html#related-field

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