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invoicemany2oneone2manymany2many
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Muszik Adrián

I wish to link(relate) two many2one lists, for example my custom module ng.machine and account.invoice

the account one:

'machine_ids' : fields.one2many('ng.machine', 'invoice_ids', 'Gépek'),

the machine one:

'invoice_ids' : fields.one2many('account.invoice', 'machine_ids', 'Számlák'),

but this gives me an error.If i change the fields to many2one then until i try to save everything works. when i try to save gives me this error:

ProgrammingError: can't adapt type 'dict'

How can i make it so that the 2 one2many list can relate to each other? bassickly on the machine's page see all the invoice that it is mentioned, and on the invoice see all the machines it mentions.

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Timo Talvitie, Vizucom Oy
Best Answer

Sounds like you should use a many2many relation for this: each of your machines can be linked to X invoices, and each of your invoices can be linked to Y machines. Try using the following fields:

In your invoice class:

'machine_ids':
   fields.many2many(
    'ng.machine',
    'ng_machine_rel',
    'invoice_id',
    'machine_id',
    'Gépek'),

And in your machine class the same thing but in reverse:

'invoice_ids':
   fields.many2many(
    'account.invoice',
    'ng_machine_rel', # same relation still
    'machine_id', # ...but fields of the relation now go in different order
    'invoice_id',
    'Számlák'),

The documentation has some notes on m2m usage here: https://doc.openerp.com/trunk/server/03_module_dev_02/

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