reason = fields.Many2many('fo.purpose', string='Purpose Of Visit', ondelete='restrict')
its remove my reference data ....why?
second question
what is the difference between ondelete='restrict' and ondelete='cascade' ?
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Hello,
@api.multi
def unlink(self):
visit_obj = self.env['visit_model']
obj = visit_obj.search([('reason', 'in', self.ids)])
if obj:
raise exceptions.ValidationError(_("You are trying to delete a record that is still referenced!"))
return super(yourclass, self).unlink()
Thanks
thanks it's working
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regarding your second question, you can find your answer here: https://www.odoo.com/id_ID/forum/help-1/ondelete-optional-parameter-19283