issues: 431800286
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| 431800286 | MDU6SXNzdWU0MzE4MDAyODY= | 427 | New design for facet abstraction, including querystring and metadata.json | 9599 | closed | 0 | 10 | 2019-04-11T02:24:15Z | 2019-05-29T21:39:12Z | 2019-05-03T00:11:29Z | OWNER | I need a better design for query strings for facets (and for how facets are enabled in `metadata.json`). Think of all of the potential kinds of facets: * `?_facet_array=tags` where tags is a JSON array of values * `_facet_date=datetimecol` - faceted by date part of a datetime * `_facet_bins=numeric_column` - can I do some kind of fancy binning here? Might need to take an argument * `?_facet_bins=numeric_column:5` - could be a way to take an argument. We’ll ignore columns with a : in their name. * `?_facet_json=jsoncol:jsonpath` - could use a JSON path to extract out something to facet on? * `?_facet_percentile=numericcolumn` - could this work? * `?_facet_function=column:sqlfunctionname` - maybe this could be interesting? Would allow for e.g. facet by soundex * `?_facet_prefix=column:prefix` - facet by terms but only if they start with a specific prefix * `?_facet_substring=column:3,6` - facet by a substr(column, 3, 6) Maybe bundling JSON in querystrings is a way to do options? `?_facet_distance={"latitude_column":"x",...}` Could detect values starting with `{` - and if for some weird reason you have a column starting with that character you can pass this instead: `?_facet_percentile={"column": "{value}"}` This could even be the mechanism that allows us to extend regular facets to support additional options like adding a sum or max to each one. Problem: it’s not obvious what the name associated with these facets should be. What if one column is faceted multiple times using multiple facet variants? Maybe just number them? name1=… name2=… etc? Other option is to use Solr style querystring syntax for notation. Solr does this: `?f.price.facet.range.gap=100&f.age.facet.range.gap=10` So how about this: `?_facet_range=age&_facet_range.span=5` Related: #359 | 107914493 | issue | {"url": "https://api.github.com/repos/simonw/datasette/issues/427/reactions", "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} | completed |