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why dummy field used in product.product

By
Atchuthan - Technical Consultant, Sodexis Inc
on 7/25/13, 4:34 AM 4,698 views

Hi,

How and when is dummy field used and can you explain in detail about dummy field.

The dummy field is defined in product.product object as:

'pricelist_id': fields.dummy(string='Pricelist', relation='product.pricelist', type='many2one'),

also why use dummy when you can use many2one field like:

'pricelist_id': fields.many2one('product.pricelist','Pricelist',),

Thanks in advance

and also used at stock.product_product for fields 'location_id','warehouse_id'.

Atchuthan - Technical Consultant, Sodexis Inc
on 7/25/13, 4:43 AM
This question has been included in the official documentation.
6
Ivan Elizaryev
On 2/19/15, 1:51 PM

fields.dummy  is like fields.function, but always return null value, when you read or when you search.

Dummy fields can be used for backward compatibility. E.g. you don't need pricelist_id field anymore, but some other modules have a reference to this field. So, instead of deleting field, you can replace one to dummy field.

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Asked: 7/25/13, 4:34 AM
Seen: 4698 times
Last updated: 3/31/15, 5:37 PM