Flask Python - multiple URL parameter with brackets

Question

hope you are all doing well.

Im working on api project using python and flask. The question I have to ask is, how can I get the values of multiple query string parameter?

The api client is built in PHP, and when a form is submitted, if some of the parameters are multiple the query string is built like filter[]=1&filter[]=2&filter[]=3... and so on.

When I dump flask request, it shows something like (filter[], 1), (filter[], 2), (filter[], 3), it seems ok, but then when I do request.args.get('filter[]') it returns only the first item in the args ImmutableDict, filter[]=1, and I can't access the other values provided.

Any help regarding this issue would be aprreciated. Happy programming!

@mechanical_meat give an answer to this question, so i can up vote it and close this. — Miguel Pinto, May 14 '20 at 15:03

score 1 · Accepted Answer · answered May 14 '20 at 15:04

1

For a MultiDict you can access all values for a given key with:

request.args.getlist('filter[]')

Documentation: https://werkzeug.palletsprojects.com/en/1.0.x/datastructures/#werkzeug.datastructures.MultiDict.getlist

answered May 14 '20 at 15:04

mechanical_meat

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score 0 · Answer 2 · answered May 14 '20 at 15:04

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try this request.args.to_dict(flat=False) to convert

answered May 14 '20 at 15:04

Derrick M'PO

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this works too, but it returns a list of length 1 even if the paramerter is only present 1 time. – Miguel Pinto May 14 '20 at 15:30

Flask Python - multiple URL parameter with brackets

2 Answers2