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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
1426379903 PR_kwDOBm6k_c5BtJNn 1870 don't use immutable=1, only mode=ro fgregg 536941 open 0     7 2022-10-27T23:33:04Z 2023-10-03T19:12:37Z   CONTRIBUTOR simonw/datasette/pulls/1870

Opening db files in immutable mode sometimes leads to the file being mutated, which causes duplication in the docker image layers: see #1836, #1480

That this happens in "immutable" mode is surprising, because the sqlite docs say that setting this should open the database as read only.

https://www.sqlite.org/c3ref/open.html

immutable: The immutable parameter is a boolean query parameter that indicates that the database file is stored on read-only media. When immutable is set, SQLite assumes that the database file cannot be changed, even by a process with higher privilege, and so the database is opened read-only and all locking and change detection is disabled. Caution: Setting the immutable property on a database file that does in fact change can result in incorrect query results and/or SQLITE_CORRUPT errors. See also: SQLITE_IOCAP_IMMUTABLE.

Perhaps this is a bug in sqlite?

:books: Documentation preview :books:: https://datasette--1870.org.readthedocs.build/en/1870/

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1555701851 PR_kwDOBm6k_c5IdsD7 2003 Show referring tables and rows when the referring foreign key is compound fgregg 536941 open 0     3 2023-01-24T21:31:31Z 2023-01-25T18:44:42Z   CONTRIBUTOR simonw/datasette/pulls/2003

sqlite foreign keys can be compound, but that is not as well supported by datasette as single column foreign keys.

in particular,

  1. in a table view, there is not a link from the row to the referenced row if the foreign key is compound
  2. in a row view, there is no listing of tables and rows that refer to the focal row if those referencing foreign keys are compound.

Both of these issues are discussed in #1099.

This PR only fixes the second one, because it's not clear what the right UX is for the first issue.

Some things that might not be desirable about this approach.

  1. it changes the external API, by changing column => columns and other_column => other_columns (see inline comment for more discussion.
  2. There are various places where the plural foreign keys have to be checked for length and discarded or transformed to singular.
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1033678984 PR_kwDOBm6k_c4tjgJ8 1495 Allow routes to have extra options fgregg 536941 open 0     5 2021-10-22T15:00:45Z 2021-11-19T15:36:27Z   CONTRIBUTOR simonw/datasette/pulls/1495

Right now, datasette routes can only be a 2-tuple of (regex, view_fn).

If it was possible for datasette to handle extra options, like standard Django does, it would add flexibility for plugin authors.

For example, if extra options were enabled, then it would be easy to make a single table the home page (#1284). This plugin would accomplish it.

```python from datasette import hookimpl from datasette.views.table import TableView

@hookimpl def register_routes(datasette): return [ (r"^/$", TableView.as_view(datasette), {'db_name': 'DB_NAME', 'table': 'TABLE_NAME'}) ] ```

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