Many2one drop box shows relation table column name value or _rec_name field value

  'field_id': fields.many2one('mymodule.relation.model', 'Test'),

check many2one relation model table "name" column is available.

or

If 'name' column is not available in python file then create

    _rec_name = "field_name"

add _id after completing your field name

• Example:

  `fieldname': fields.many2one('ObjectName', 'Label', help='Help note'),`
  

make it

 ` fieldname_id': fields.many2one('ObjectName', 'Label', help='Help note'),`