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[8.0] Computed field with bulk write

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Emanuel Cino

In official documentation, we have the following example for computed fields :

total = fields.Float(compute='_compute_total') 

@api.depends('value', 'tax')
def _compute_total(self):
for record in self:
record.total = record.value + record.value * record.tax

On the guidelines, we can read :

Be aware that this assignation will trigger a write into the database. If you need to do bulk change or must be careful about performance, you should do classic call to write 

My question is how can we do the bulk change ? Is it valid to add the decorator @api.multi over the compute function and do something like self.write() ?

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Anil Kesariya
Best Answer

Hi Emanuel,

Yes by using decorator @api.multi you can write bulk record of same model.

If you are overriding write metho than you have to define decorator

@api.multi

This is the standard convention we always use multi for write because if write method is already overriden some where in custom module it will create singlton error if you not follow the multi api.

Suggestion is to always use api.multi when write come to picture.

Hope this will help.

Rgds,

Anil.





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Emanuel Cino
Author

Sorry, my question was not very clear. I wanted to know what should we do specifically for computed fields. Can we decorate the compute functions used in fields with @api.multi ?

Anil Kesariya

@Emanuel cino, Yes when you decorate your computational field with api.multi than it will auto trigger the that methods when the records will be loaded or any changes going to happen in any of record in the same model.

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