Custom regex match for filter syntax

[Nekidev]

Is there a way to do custom match patterns for filter query params? For example, instead of using price__gt, being able to do filter[price.gt].

Something like this:

import re

match = r"^filter\[([a-zA-Z]+).?([a-zA-Z]+)?\]"
def parse_filter(match, filter):
    if not re.match(match, filter):
        raise Exception("Invalid filter")
    search = re.search(match, filter)
    return search.group(1), search.group(2)

query_param = input("Filter > ")
field, lookup_expr = parse_filter(match, query_param)
print(f"Result: " + (f"{field}__{lookup_expr}" if lookup_expr else field))

Here, the parse_filter func will return the field where the filter should be applied and the lookup expression (or None if does not exist). In this way, I would be able to change the syntax of the query param filters according to what I need.

Is there a way to do this? Or the default field__lookup is the only one allowed?

[carltongibson]

This isn't built-in, but see LookupChoiceFilter that does something similar. (You'll need to handle the mapping from the GET QueryDict to the filter() implementation.)