Allow complex filters being set

[jluethi]

If my understanding is correct, we currently can filter for the following: Inclusion only AND combination of filters Single filter per attribute / type For types: Filter for boolean true vs. false For attributes: Filter for exact match of the attribute

Correct me if I'm wrong and we already support more in V2 @tcompa

Because it comes up in web discussions, I'll try to give a larger perspective of where this could go in the future. This is not meant as blocking for the v2 release.

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There are many areas where we could expand the filters to allow for more complex filters, ordered by approximate importance:

Important:

• Exclude given matches: e.g. process everything except well B07 (because there was some issue with that well)
• Support for OR filters per attribute: Filter for wells B03, B05, C04, C07 => allows for selection of multiple items

Nice to have:

• Filter with complex patterns, e.g. all B wells by saying filter "well = B*"

I don't currently see the value in: Support OR filters between attributes: Look for well B03 or acquisition 1

[tcompa]

Reminder: the action of merging two filter sets together is now also implemented in fractal-web (ref https://github.com/fractal-analytics-platform/fractal-web/issues/442). When we change the filter structure, we should either change it in both places or offer a dedicated endpoint for the merge operation.