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Nahabwe Brian


  How do I automatically retrieve the data from a field which is already stored in the database so that it can be used the autofill another many2one field which is new ? for example

I have a course_id field which already has Its Stored data in the database

course_id = fields.Many2one ('op.course', 'Course') 

Then i created another new program_id field inside the same class

program_id = fields.Many2one ('op.program', 'Program', domain = "[('course_id', '=', course_id)]")

 When i tried the onchange method, it works perfectly

@ api.onchange ('course_id') 
        def onchange_course (self): 
                    prog_id = false 
                   if self.course_id and self.course_id.program_id: 
                    prog_id = self.course_id.program_id.id 
                    self.program_id = prog_id 

But now i want program_id field to be updated automatically in the tree and form view  by using the course ids which are already stored. Am using Odoo version 12


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Antonio Condez
Best Answer

Hi! One way also is to use compute attribute in your fields declaration.

E.g.: 

program_id = fields.Many2one ('op.program', string='Program', domain = "[('course_id', '=', course_id)]"
            compute="_your_method_name")
@ api.depends('course_id') 
def _your_method_name(self): 
    for record in self:                                                         
        prog_id = false 
        if self.course_id and self.course_id.program_id: # just do your work around starting on these lines and you'll get want you want in no time 
           prog_id = record.course_id.program_id.id #map your values correctly here
           record.program_id = prog_id 

This will automatically update both your form and tree view for the referred field.

Hope it helps.

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Harsh Savsani
Best Answer

Hello Brian,

You can also use the related field to get the value of program_id automatically.

try this code,

program_id = fields.Many2one ('op.program', related='course_id.program_id', string='Program', domain = "[('course_id', '=', course_id)]")


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