Odoo tree view only show one record with compute

问题

I'm trying to display a user signed documents (from the "Sign app") on his page, so I added this to the inherited model:

    x_signatures_relation = fields.One2many("signature.request.item", "partner_id")
    x_signatures = fields.One2many("signature.request", compute="_get_signed_documents")

    @api.one
    def _get_signed_documents(self):
        ids = []
        for signature in self.x_signatures_relation:
            ids.append(signature.signature_request_id)
        self.x_signatures = ids

"signature.request.item" is the table relating the partner (user) with "signature.request" the actual signature. However this return an empty view even though the current user has two signatures, but if I replace :

self.x_signatures = ids

with :

self.x_signatures = ids[0]

or :

self.x_signatures = ids[1]

It displays the record, so what's going on ?

回答1:

Odoo has a very specific set of rules about how you are "allowed" to manipulate One2many and Many2Many fields.

See my recent answer, which gives a detailed explanation of all options and when/how to use them. The Odoo documentation also explains it as well.

In your case, you are setting the value in a compute method, so you want to completely replace any existing values.

# Instead of 
# self.x_signatures = ids
# Try this, which uses the special number 6 to mean
# "replace any existing ids with these ids"
self.x_signatures = [(6, 0, ids)]

Furthermore, you could simplify your compute method:

@api.one
def _get_signed_documents(self):
    self.x_signatures = [(6, 0, self.x_signatures_relation.ids)]

来源：https://stackoverflow.com/questions/54245863/odoo-tree-view-only-show-one-record-with-compute