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
625930207,MDU6SXNzdWU2MjU5MzAyMDc=,770,register_output_renderer can_render mechanism,9599,closed,0,,5471110,4,2020-05-27T18:29:14Z,2020-05-28T05:57:16Z,2020-05-28T05:57:16Z,OWNER,,"I would like is the ability for renderers to opt-in / opt-out of being displayed as options on the page.

https://www.niche-museums.com/browse/museums for example shows a atom link because the datasette-atom plugin is installed... but clicking it will give you a 400 error because the correct columns are not present.

<img width=""1113"" alt=""browse__museums__102_rows"" src=""https://user-images.githubusercontent.com/9599/83058543-62278e80-a00d-11ea-9e04-298e02745118.png"">

Here's the code that passes a list of renderers to the template:

https://github.com/simonw/datasette/blob/2d099ad9c657d2cab59de91cdb8bfed2da236ef6/datasette/views/base.py#L411-L423

A renderer is currently defined as a two-key dictionary:
```python
@hookimpl
def register_output_renderer(datasette):
    return {
        'extension': 'test',
        'callback': render_test
    }
```
I can add a third key, `""should_suggest""` which is a function that returns `True` or `False` for a given query. If that key is missing it is assumed to return `True`.

One catch: what arguments should be passed to the `should_suggest(...)` function?

UPDATE: now calling it `can_render` instead.

_Originally posted by @simonw in https://github.com/simonw/datasette/issues/581#issuecomment-634856748_",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/770/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
611540797,MDU6SXNzdWU2MTE1NDA3OTc=,751,Ability to set custom default _size on a per-table basis,9599,closed,0,,5471110,4,2020-05-04T00:13:03Z,2020-05-28T05:00:22Z,2020-05-28T05:00:20Z,OWNER,,"I have some tables where I'd like the default page size to be 10, without affecting the rest of my Datasette instance.",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/751/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
626001501,MDU6SXNzdWU2MjYwMDE1MDE=,773,All plugin hooks should have unit tests,9599,closed,0,,5471110,2,2020-05-27T20:17:41Z,2020-05-28T04:12:11Z,2020-05-28T04:09:25Z,OWNER,,"Four hooks currently missing tests:

- [x] prepare_jinja2_environment
- [x] publish_subcommand
- [x] register_facet_classes
- [x] register_output_renderer

```
$ pytest -k test_plugin_hooks_have_tests -vv
====================================== test session starts ======================================
platform darwin -- Python 3.7.7, pytest-5.2.4, py-1.8.1, pluggy-0.13.1 -- /Users/simon/.local/share/virtualenvs/datasette-AWNrQs95/bin/python
cachedir: .pytest_cache
rootdir: /Users/simon/Dropbox/Development/datasette, inifile: pytest.ini
plugins: asyncio-0.10.0
collected 486 items / 475 deselected / 11 selected                                              

tests/test_plugins.py::test_plugin_hooks_have_tests[asgi_wrapper] XPASS                   [  9%]
tests/test_plugins.py::test_plugin_hooks_have_tests[extra_body_script] XPASS              [ 18%]
tests/test_plugins.py::test_plugin_hooks_have_tests[extra_css_urls] XPASS                 [ 27%]
tests/test_plugins.py::test_plugin_hooks_have_tests[extra_js_urls] XPASS                  [ 36%]
tests/test_plugins.py::test_plugin_hooks_have_tests[extra_template_vars] XPASS            [ 45%]
tests/test_plugins.py::test_plugin_hooks_have_tests[prepare_connection] XPASS             [ 54%]
tests/test_plugins.py::test_plugin_hooks_have_tests[prepare_jinja2_environment] XFAIL     [ 63%]
tests/test_plugins.py::test_plugin_hooks_have_tests[publish_subcommand] XFAIL             [ 72%]
tests/test_plugins.py::test_plugin_hooks_have_tests[register_facet_classes] XFAIL         [ 81%]
tests/test_plugins.py::test_plugin_hooks_have_tests[register_output_renderer] XFAIL       [ 90%]
tests/test_plugins.py::test_plugin_hooks_have_tests[render_cell] XPASS                    [100%]

========================= 475 deselected, 4 xfailed, 7 xpassed in 1.70s =========================

_Originally posted by @simonw in https://github.com/simonw/datasette/issues/771#issuecomment-634915104_",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/773/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
626163974,MDU6SXNzdWU2MjYxNjM5NzQ=,776,register_output_renderer render callback should be optionally awaitable,9599,closed,0,,5471110,1,2020-05-28T02:26:29Z,2020-05-28T02:43:36Z,2020-05-28T02:43:36Z,OWNER,,"In #581 I made a bunch of improvements to this, including making `datasette` available to it so it could execute queries.

But... it needs to be able to `await` in order to do that. Which means it should be optionally-awaitable.

Original idea here: https://github.com/simonw/datasette/issues/645#issuecomment-560036740",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/776/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
502993509,MDU6SXNzdWU1MDI5OTM1MDk=,581,Redesign register_output_renderer callback,9599,closed,0,,5471110,24,2019-10-05T17:43:23Z,2020-05-28T02:24:14Z,2020-05-28T02:21:50Z,OWNER,,"In building https://github.com/simonw/datasette-atom it became clear that the callback function (which currently accepts just args, data and view_name) would also benefit from access to a mechanism to render templates and a `datasette` instance so it can execute SQL.

To maintain backwards compatibility with existing plugins, we can introspect the callback function to see if it wants those new arguments or not.

At a minimum I want to make `datasette` and ASGI `scope` available.",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/581/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
620969465,MDU6SXNzdWU2MjA5Njk0NjU=,767,Allow to specify a URL fragment for canned queries,2657547,closed,0,,5471110,2,2020-05-19T13:17:42Z,2020-05-27T21:52:25Z,2020-05-27T21:52:25Z,CONTRIBUTOR,,"Canned queries are very useful to direct users to prepared data and views. I like to use them with charts using datasette-vega a lot, because people get a direct impression at first glance.

datasette-vega doesn't show up by default though, and users have to click through to it. Also, datasette-vega does not always guess the best way to render columns correctly though, so it would be nice if I could specify a URL fragment in my canned queries to make sure people see what I want them to see.

My current workaround is to include a fragement link in ``description_html`` and ask people to reload the page, like [here](https://data.rixx.de/songs/show_by_bpm#g.mark=bar&g.x_column=bpm_floor&g.x_type=ordinal&g.y_column=bpm_count&g.y_type=quantitative), which is a bit hacky.",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/767/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
616012427,MDU6SXNzdWU2MTYwMTI0Mjc=,764,Add PyPI project urls to setup.py,9599,closed,0,,5471110,3,2020-05-11T16:23:08Z,2020-05-27T20:21:36Z,2020-05-11T18:28:55Z,OWNER,,"Spotted this example here:
```python
    project_urls={
        ""Issues"": ""https://gitlab.com/Cyb3r-Jak3/ExifReader/issues"",
        ""Source Code"": ""https://gitlab.com/Cyb3r-Jak3/ExifReader/-/tree/publish"",
        ""CI"": ""https://gitlab.com/Cyb3r-Jak3/ExifReader/pipelines"",
        ""Releases"": ""https://github.com/Cyb3r-Jak3/ExifReader""
    },
```
Results in this on https://pypi.org/project/ExifReader/

<img width=""333"" alt=""ExifReader_·_PyPI"" src=""https://user-images.githubusercontent.com/9599/81585430-03a1b580-9369-11ea-9b58-e2f732cc13f8.png"">
",107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/764/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed
625980317,MDU6SXNzdWU2MjU5ODAzMTc=,771,Unit test that checks that all plugin hooks have corresponding unit tests,9599,closed,0,,5471110,5,2020-05-27T19:42:35Z,2020-05-27T20:21:36Z,2020-05-27T20:17:13Z,OWNER,,Turns out some hooks are missing unit test coverage: https://github.com/simonw/datasette/issues/581#issuecomment-634893744_,107914493,issue,,,"{""url"": ""https://api.github.com/repos/simonw/datasette/issues/771/reactions"", ""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,completed