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How can I mark a field "unique" in a custom model?

By
Martin
on 6/26/13, 3:32 PM 7,901 views

When I create a custom model in the web GUI, how can I mark a field as "unique", so that the database will never create a second row with the same field value?

6
Ray Carnes
On 6/26/13, 4:42 PM

You can only do this when you create your field via Python.

See https://accounts.openerp.com/forum/Help-1/question/16386

_sql_constraints = [
                     ('field_unique', 
                      'unique(field)',
                      'Choose another value - it has to be unique!')
]

Note that if there are existing records for the model in the database, then any field values have to be unique, or this will fail and OpenERP will do nothing to enforce the constraint for new records.

Thanks, so I will have to write a Python module for my table. Maybe it would be a nice enhancement if there would be a "unique" flag in the GUI as well. I assume, that unique fields are needed often (serial numbers, order numbers, etc.).

Martin
on 6/26/13, 7:58 PM
1
Thierry Godin
On 6/26/13, 4:40 PM

Hi,

add a sql constraint to your model :

_sql_constraints = [
        ('uniq_name', 'unique(stuff_name)', "A stuff already exists with this name . Stuff's name must be unique!"),
    ]

Best regards

Thanks, too!

Martin
on 6/26/13, 8:00 PM

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Asked: 6/26/13, 3:32 PM
Seen: 7901 times
Last updated: 3/16/15, 8:10 AM