Re: function model which generate a code for model field

Hi Anselme,


On 27/05/2020 13.33, Anselme SERI wrote:
>
> What I want to do is fill in the 'code' field of my 'Diploma' template.
> For example, the first record of the model will have the value
> 'BAC00001' in the 'code' field, the second 'BAC00002', ...., 'BAC01653'
> .....
> The approach I have chosen to achieve this objective consists in
> defining a function in the model which will retrieve the value of the
> last id of the last record, increment it then concatenate it to the
> chain to obtain the value of the code field of the new recording. code =
> chain + (lastid + 1) with chain = 'BAC000 ..'. I hope it's clear now?
>

There might be better ways to do this, but I would override the save()
method of your model with something like:

def save(self, *args, **kwargs):
self.code = 'BAC{:05}'.format(self.id)
super(MyModel, self).save(*args, **kwargs)

Untested, but hopefully you get the idea.

Kind regards,

Kasper Laudrup

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