Re: Is there a way to make a field both foreignKey or allow user to fill it in themself?

On Wed, Feb 28, 2018 at 12:46 AM, Mike Dewhirst <miked@dewhirst.com.au> wrote:

On 28/02/2018 1:58 PM, Alexander Joseph wrote:

Sorry, I think my question was confusing. What I want to do is allow the user to either select a user from a drop down list of users from the ForeignKey in the Users model, or if there is not a user suitable to select in the drop down, they can manually type in a name themselves.

In the same field that would require a hack of the first water.  Way above my pay grade. For me, anything which equates an existing user object with a string typed in is likely to end in misery.

Otherwise a separate CharField for the typed in name and null=True and blank=True in the ForeignKey ought to work.

Mike

Indeed, what you can also do - besides the nullable FK, is process that in the Form where if the FK is null and the the charfield is not None, then create a User (maybe non active) with that name and assign it to the FK. 

 

Thanks for your reply



On Tuesday, February 27, 2018 at 7:45:51 PM UTC-7, Mike Dewhirst wrote:

    On 28/02/2018 1:26 AM, Alexander Joseph wrote:
    > Is there a way to make a form field or model field either a foreign
    > key reference or allow the user to fill in something themselves?
    I'm
    > making a fixed assets app and each fixed asset has an owner field,
    > which I would like to assign to an app user if possible, and if not
    > possible be able to fill in a name myself.

    Yes. Make the ForeignKey in the model null=True and blank=True so
    it can
    exist all alone. Then you can limit_choices_to whatever whatever
    suits
    your requirements ...

    https://docs.djangoproject.com/en/1.11/ref/models/fields/#django.db.models.ForeignKey.limit_choices_to
    <https://docs.djangoproject.com/en/1.11/ref/models/fields/#django.db.models.ForeignKey.limit_choices_to>


    hth
    Mike


    >
    > Thanks
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