Pre-filling fields in create view

[jacobsvante]

It would be nice to be able to pre-configure the create_view endpoint by passing in GET parameters to it.

So this URL:
http://mysite.dev/admin/productsku/?size=2&variant=3&season=1&season=2&ean_code=123456789
Would produce something like this:

[rochacbruno]

👍

[mrjoes]

I'm not sure it is very safe to do so. Also, you can easily support it by overriding get_create_form() and passing values from request.

[rochacbruno]

@mrjoes So we can write an app to include in examples?

[mrjoes]

Ugh, examples folder will get really huge. Maybe some sort of recipe section on flask-admin.org would be better.

[jacobsvante]

Is safety really an issue? Not sure I follow.

[mrjoes]

Allows creating and distributing link to the admin panel that'll have some non-safe values preselected even if defaults are totally safe.

[crzyhorse]

Since it seems that neither a code sample or a recipe section were added for this, and since I struggled with this, I thought I would post my solution.

class MyModelView(ModelView):
     # override create form, not get_create_form as mentioned above. 
     def create_form(self):
         form = super(MyModelView, self).create_form()
         if ('variant') in request.args.keys():
             variant_query = self.session.query(Variant).filter(Variant.id = request.args['variant']).one()
             form.variant.query = [variant_query]
        if ('size') in request.args.keys():
             size_query = self.session.query(Size).filter(Size.id = request.args['size']).one()
             form.size.query = [size_query]
        return form 

Also, I'm using this to create action buttons to create entries for another view, with references to the previous view selected by default. If worried about non-safe values, just validate that the request arguments are in acceptable range before using them.

[rachmadaniHaryono]

another example

class FilteredImageURLView(CustomModelView):
    """Custom view for Tag model."""

    def create_form(self):
        form = super().create_form()
        ImageUrl = models.ImageURL
        if ('img_id') in request.args.keys():
            img_url_m = self.session.query(ImageUrl).filter(ImageUrl.id == request.args['img_id']).one()  # NOQA
            form.img_url.data = img_url_m
        return form

the code form crzyhorse only limit the selection. this one set the default value on the form.

[GrenderG]

Hi all, although this is not 100% related to this issue, how can I achieve this?

[che-alar]

@GrenderG URL parameter for season must be &seasons=[1,2]

import json

seasons = request.args.get('seasons')
if seasons:
    seasons = json.loads(seasons)
    seasons_query = self.session.query(Seasons).filter(Seasons.id.in_(seasons)).all()
    form.seasons.data = seasons_query

[petrus-jvrensburg]

Thanks @jmagnusson

@crzyhorse & @rachmadaniHaryono Would you mind adding that to one of the existing examples? With a few comments to explain what's happening?

[jlelong]

For anyone coming here, I had to tweak #1051 (comment) a bit to make it work as updating the form data fails

class FilteredImageURLView(CustomModelView):
    """Custom view for Tag model."""

    def create_form(self):
        ImageUrl = models.ImageURL
        if ('img_id') in request.args.keys():
            img_url_m = self.session.query(ImageUrl).filter(ImageUrl.id == request.args['img_id']).one()  # NOQA
            return super(imageURL).create_form(image_url_m)
        return super(imageURL).create_form()