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ai

I have 2 classes and with Many2one-relation. How can i display  the title from class A in a form view from class B (title_from_a)?

The form view for class B does not show the title, but after saving it shows the title. is there a solution?


class A(models.Model):

    _name = 'class.a'

    title = fields.Char('Title')

    b_ids = fields.One2Many('class.b', 'a_id')


class B(models.Model):

    _name = 'class.b'

    a_id = fields.Many2one('class.a')

    title_from_a = fields.Char(related='a_id.title')


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Jignesh Mehta
Best Answer

Hello ai,

You can give _rec_name for display name in models.

For this, try below code:


class B(models.Model):

    _name = 'class.b'

    _rec_name = 'title_from_a'


    a_id = fields.Many2one('class.a')

    title_from_a = fields.Char(related='a_id.title')


Hope it will works for you.

Thanks,

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ai
Author

thanks for your answer, but I would like to have that value for working with it. Is that possible?

Jignesh Mehta

When you saved record then title_from_a is display

ai
Author

Yes, but I want to display in a form before and not after saving. is that possible?

Jignesh Mehta

If you want to display as display name then it is not possible. if you want to display in form view then select a_id and after selecting a_id automatic display it's title in title_form_a field.

ai
Author

I just want to display in form view of class.b. but title_from_a does not appear on the form view.

Jignesh Mehta

Try to give _rec_name to class a.

For Ex:

class A(models.Model):

_name = 'class.a'

_rec_name = 'title'

title = fields.Char('Title')

b_ids = fields.One2Many('class.b', 'a_id')

ai
Author

it does not work. title_from_a is still empty. ;(