issues: 1605959201
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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 |
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| 1605959201 | I_kwDOBm6k_c5fuP4h | 2032 | datasette errors when foreign key integrity is enabled | 193185 | open | 0 | 0 | 2023-03-02T01:27:51Z | 2023-03-02T01:31:58Z | CONTRIBUTOR | By default, [SQLite does not enforce foreign key constraints](https://www.sqlite.org/foreignkeys.html#fk_enable). I typically enable these checks by running: ```sql PRAGMA foreign_keys = ON; ``` inside of a `prepare_connection` hook. If a plugin causes the schema to change (eg datasette-scraper creating a new table, or datasette-edit-schema changing a column), then https://github.com/simonw/datasette/blob/0b4a28691468b5c758df74fa1d72a823813c96bf/datasette/utils/internal_db.py#L71-L77 will fail with: ``` FOREIGN KEY constraint failed ``` This could be resolved by either: - deleting from the `tables` column last - changing the schema so that the foreign keys have [ON DELETE CASCADE](https://www.sqlite.org/foreignkeys.html#fk_actions) Let me know if you'd be open to a PR that addresses this -- since foreign key constraints aren't enabled by default, I guess it's questionable whether this is a bug. I think I can workaround this by inspecting the database parameter in `prepare_connection` and trying not to enable fkey checks on the `_internal` database. | 107914493 | issue | {"url": "https://api.github.com/repos/simonw/datasette/issues/2032/reactions", "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} |