html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,issue,performed_via_github_app
https://github.com/simonw/datasette/issues/842#issuecomment-646271834,https://api.github.com/repos/simonw/datasette/issues/842,646271834,MDEyOklzc3VlQ29tbWVudDY0NjI3MTgzNA==,9599,2020-06-18T19:49:41Z,2020-06-24T18:49:22Z,OWNER,"But then what kind of magic parameters might plugins want to add?

Here's a crazy idea: `_scrapedcontent_url` - it would look for the `url` column on the data being inserted, scrape the content from it and insert that. This does suggest that the magic resolving function `scrapedcontent()` would need to optionally be sent the full row dictionary being inserted too.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",638212085,
https://github.com/simonw/datasette/issues/842#issuecomment-646270702,https://api.github.com/repos/simonw/datasette/issues/842,646270702,MDEyOklzc3VlQ29tbWVudDY0NjI3MDcwMg==,9599,2020-06-18T19:47:19Z,2020-06-24T18:48:48Z,OWNER,"Brainstorming more potential magic parameters:

* `_actor_id`
* `_actor_name`
* `_request_ip`
* `_request_user_agent`
* `_cookie_cookiename`
* `_signedcookie_cookiename` - reading signed cookies would be cool, not sure how to specify namespace though, maybe always use the same one? Or have the namespace come last, `_signedcookie_cookiename_mynamespace`. Might not need special signed cookie support since `actor` is already usually from a signed cookie.
* `_timestamp_unix` (not happy with these names yet)
* `_timestamp_localtime`
* `_timestamp_datetime`
* `_timestamp_utc`","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",638212085,
https://github.com/simonw/datasette/issues/842#issuecomment-646272627,https://api.github.com/repos/simonw/datasette/issues/842,646272627,MDEyOklzc3VlQ29tbWVudDY0NjI3MjYyNw==,9599,2020-06-18T19:51:32Z,2020-06-18T19:51:32Z,OWNER,I'd be OK with the first version of this not including a plugin hook.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",638212085,
https://github.com/simonw/datasette/issues/842#issuecomment-646264051,https://api.github.com/repos/simonw/datasette/issues/842,646264051,MDEyOklzc3VlQ29tbWVudDY0NjI2NDA1MQ==,9599,2020-06-18T19:32:13Z,2020-06-18T19:32:37Z,OWNER,"If every magic parameter has a prefix and suffix, like `_request_ip` and `_actor_id`, then plugins could register a function for a prefix. Register a function to `_actor` and `actor(""id"")`will be called for `_actor_id`.

But does it make sense for every magic parameter to be of form `_a_b`? I think so.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",638212085,
https://github.com/simonw/datasette/issues/842#issuecomment-646246062,https://api.github.com/repos/simonw/datasette/issues/842,646246062,MDEyOklzc3VlQ29tbWVudDY0NjI0NjA2Mg==,9599,2020-06-18T18:54:41Z,2020-06-18T18:54:41Z,OWNER,"The `_actor_id` param makes this a bit trickier, because we can't just say ""if you see an unknown parameter called X call this function"" - our magic parameter logic isn't adding single parameters, it might add a whole family of them.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",638212085,
https://github.com/simonw/datasette/issues/842#issuecomment-646242172,https://api.github.com/repos/simonw/datasette/issues/842,646242172,MDEyOklzc3VlQ29tbWVudDY0NjI0MjE3Mg==,9599,2020-06-18T18:46:06Z,2020-06-18T18:53:31Z,OWNER,"Yes that can work - and using `__missing__` (new in Python 3) is nicer because then the regular dictionary gets checked first:
```python
import sqlite3

conn = sqlite3.connect("":memory:"")


class Magic(dict):
    def __missing__(self, key):
        return key.upper()


conn.execute(""select :name"", Magic()).fetchall()
```
Outputs:
```
[('NAME',)]
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",638212085,
https://github.com/simonw/datasette/issues/842#issuecomment-646238702,https://api.github.com/repos/simonw/datasette/issues/842,646238702,MDEyOklzc3VlQ29tbWVudDY0NjIzODcwMg==,9599,2020-06-18T18:39:07Z,2020-06-18T18:39:07Z,OWNER,"It would be nice if Datasette didn't have to do any additional work to find e.g. `_request_ip` if that parameter turned out not to be used by the query.

Could I do this with a custom class that implements `__getitem__()` and then gets passed as SQLite arguments?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",638212085,