issues

These are in the codebase but not in documentation. I think everything else in this class is documented.

```python class Urls: ... def row(self, database, table, row_path, format=None): path = f"{self.table(database, table)}/{row_path}" if format is not None: path = path_with_format(path=path, format=format) return PrefixedUrlString(path)

def row_blob(self, database, table, row_path, column):
    return self.table(database, table) + "/{}.blob?_blob_column={}".format(
        row_path, urllib.parse.quote_plus(column)
    )

```

I started working on using config_dir with my datasette-query-files plugin and realized Datasette doesn't actually hold onto the config_dir argument. It gets used in __init__ but then forgotten. It would be nice to be able to use it in plugins, though.

Here's the reference issue: https://github.com/eyeseast/datasette-query-files/issues/4

Closes #1764

Small change that adds self.config_dir = config_dir to Datasette.__init__. This will let plugins also use config_dir, if available.

They're generated by Spatialite and not very interesting in most cases.

Ran into an issue while trying to build a plugin to render GeoJSON. I'm using pytest's tmp_path fixture, which is a pathlib.Path, to get a temporary database path. I was getting a weird error involving writes, but I was doing reads. Turns out it's the internal database trying to insert a Path where it wants a string.

My test looked like this:

```python @pytest.mark.asyncio async def test_render_feature_collection(tmp_path): database = tmp_path / "test.db" datasette = Datasette([database])

# this will break with a path
await datasette.refresh_schemas()

# build a url
url = datasette.urls.table(database.stem, TABLE_NAME, format="geojson")

response = await datasette.client.get(url)
fc = response.json()

assert 200 == response.status_code

```

I only ran into this while running tests, because passing in database paths from the CLI uses strings, but it's a weird error and probably something other people have run into.

The fix is easy enough: Convert the path to a string and everything works. So this:

```python @pytest.mark.asyncio async def test_render_feature_collection(tmp_path): database = tmp_path / "test.db" datasette = Datasette([str(database)])

# this is fine now
await datasette.refresh_schemas()

```

This could (probably, haven't tested) be fixed here by calling str(db.path) or by doing that conversion earlier.

Fixes #1365

This is the simplest possible fix, with a test that will fail without it. There are a bunch of places where db.path is getting converted to and from a Path type, so this fix errs on the side of calling str(db.path) right before it's inserted.