How can I accept multiple UUID url params?

[elgin9507]

I defined my field as:

region = UUIDFilter(method="filter_by_region")

When client send urls params like ?region=f157cb5a-7cb0-4672-82b3-3d5e381b6c60&region=f157cb5a-7cb0-4672-82b3-3d5e381b6c61, I got only the last value in value parameter of filter_by_region method, but I need all of them as a list. What is the best way of handling this use case? I would expect parameter like many=True for filter object or some kind of wrapper that accepts filter object for representing array of objects (e.g. ArrayFilter(UUIDFilter(...))). But I couldn't find any of these in the documentation and also any other possible solution.

How would you implement this?

[carltongibson]

Take a look at MultipleChoiceFilter and ModelMultipleChoiceFilter https://django-filter.readthedocs.io/en/stable/ref/filters.html#modelmultiplechoicefilter

At the bottom level they both use a widget that calls QueryDict.getlist() to fetch a list of values, rather than just a single value, from the query string.

[elgin9507]

@carltongibson but I don't intend to introduce any choice. I mean client should be able to send UUID values as many as it wishes, which are not related to any database model or list of choices.

[carltongibson]

Which is why I pointed you to the QueryDict docs.

You'll need a widget that uses getlist, a Form Field that validates and maps strings to UUID instances, and then a Filter that uses that Field. (It sounds a lot but each class is quite limited in scope. You should be able to follow the existing examples in package.)

[elgin9507]

@carltongibson should I do the same for CharFilter too, if want to accept list of strings? I think this is frequently used pattern in REST APIs, so it is weird why there's no builtin support.