id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,pull_request,body,repo,type,active_lock_reason,performed_via_github_app,reactions,draft,state_reason
322477187,MDU6SXNzdWUzMjI0NzcxODc=,255,Facets,9599,closed,0,,,16,2018-05-12T03:00:07Z,2019-05-29T21:39:12Z,2018-05-16T15:32:12Z,OWNER,,"Ability to display facets and facet counts on the table view.

Facets can be specified in the URL with `?_facet=column&_facet=othercolumn` or the default facets for a table can be set using a new `""facets"": [...]` property in `metadata.json`

- [x] Implement `?_facet=`
- [x] Implement `metadata.json` `facets` key
- [x] Design for how facets should be presented
- [x] Facets should be able to toggle off as well as on
- [x] Expand labels for facets that are foreign keys
- [x] Suggest potential facets (if we can do so within a tight time limit)
- [x] Documentation",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/255/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
334148669,MDU6SXNzdWUzMzQxNDg2Njk=,318,Facets with value of 0 displayed incorrectly,9599,closed,0,,3439337,1,2018-06-20T16:06:46Z,2019-05-29T21:39:12Z,2018-06-21T04:30:45Z,OWNER,,"https://registry.datasette.io/registry-7d4f81f/tables?_facet=is_hidden#facet-is_hidden

![2018-06-20 at 9 05 am](https://user-images.githubusercontent.com/9599/41670448-2c06e642-7469-11e8-86be-4664269582b1.png)

Displays correctly if you select it:

https://registry.datasette.io/registry-7d4f81f/tables?_facet=is_hidden&is_hidden=0

![2018-06-20 at 9 06 am](https://user-images.githubusercontent.com/9599/41670471-3e61e486-7469-11e8-8710-5da90ef65787.png)
",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/318/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
346028655,MDU6SXNzdWUzNDYwMjg2NTU=,356,Ability to display facet counts for many-to-many relationships,9599,closed,0,,,4,2018-07-31T04:14:26Z,2019-05-29T21:39:12Z,2019-05-25T16:30:09Z,OWNER,,Parent: #354,107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/356/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
349827640,MDU6SXNzdWUzNDk4Mjc2NDA=,359,Faceted browse against a JSON list of tags,9599,closed,0,,,6,2018-08-12T17:01:14Z,2019-05-29T21:39:12Z,2019-05-03T00:21:44Z,OWNER,,"If a table has a `[""foo"", ""bar"", ""baz""]` JSON column allow that to be faceted against.

- [x] Support `?column__arraycontains=x` filter queries
- [x] Support `?_facet_array=column` faceting",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/359/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
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
445862501,MDU6SXNzdWU0NDU4NjI1MDE=,477,Documentation for ArrayFacet (facet by JSON array),9599,closed,0,,4305096,0,2019-05-19T20:47:27Z,2019-05-29T21:39:12Z,2019-05-19T21:19:43Z,OWNER,,This is missing from https://datasette.readthedocs.io/en/0.27.1/facets.html right now,107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/477/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
446429421,MDU6SXNzdWU0NDY0Mjk0MjE=,481,Facet by date,9599,closed,0,,,1,2019-05-21T05:55:54Z,2019-05-29T21:39:12Z,2019-05-21T06:09:49Z,OWNER,,Ability to facet on datetime fields by their date.,107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/481/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed