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Odoo Tools Federazione Russa

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St Petersburg, Federazione Russa
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Odoo Tools Federazione Russa
15/11/18, 10:40


it is better to avoid using the standard field parent_id which is of the many2one type. There is logic which relies upon that, and you would spent quite much time to recover it.

It is better to introduce 2 new fields of many2many:

contact_m2m_ids = fields.Many2many(
parents_m2m_ids = fields.Many2many(

Basically, many2many fields are based on a intermediary table, which might be used for both direct and backward relation. In the example it is the table 'rel_table', which has 2 columns 'back_rel_id' & 'direct_rel_id'. It is possible to avoid defining 'rel_table': but if you have 2 relational fields for the same model, it will not work. For more info look at: https://www.odoo.com/documentation/10.0/reference/orm.html#relational-fields

If you want to use 'parent_id' anyway, then it is better to make a computed m2m field, which would use it but would not redefine it:

def _compute_m2m_parents_ids(self):
    for partner in self:
        if partner.parent_id:
            partner.m2m_parents_ids = [(6, 0, [partner.parent_id.id])]
            partner.m2m_parents_ids = [(6, 0, [])]            
m2m_parents_ids = fields.Many2many(   
1 Commento
wizardz Svizzera
26/11/18, 03:00

thank you

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