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/sqlite-utils/issues/530#issuecomment-1539018912,https://api.github.com/repos/simonw/sqlite-utils/issues/530,1539018912,IC_kwDOCGYnMM5bu5Cg,9599,2023-05-08T20:39:00Z,2023-05-08T20:39:00Z,OWNER,"I think the natural place to add these in the Python library API would be https://sqlite-utils.datasette.io/en/stable/python-api.html#adding-foreign-key-constraints - maybe something like this:

```python
db[""books""].add_foreign_key(""author_id"", ""authors"", ""id"", on_delete=RESTRICT)
```

Then for the CLI tool could be added to https://sqlite-utils.datasette.io/en/stable/cli-reference.html#add-foreign-key

```
sqlite-utils add-foreign-key my.db books author_id authors id --on-update SET_NULL
```
I wouldn't support these for the other methods of adding foreign keys - `foreign_keys(...)` for the various `.insert()` etc methods and the `add_foreign_keys(...)` bulk menthod.","{""total_count"": 1, ""+1"": 0, ""-1"": 0, ""laugh"": 1, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1595340692,
https://github.com/simonw/sqlite-utils/issues/530#issuecomment-1539015064,https://api.github.com/repos/simonw/sqlite-utils/issues/530,1539015064,IC_kwDOCGYnMM5bu4GY,9599,2023-05-08T20:35:07Z,2023-05-08T20:35:07Z,OWNER,"Wow, this is a neat feature I didn't know about. Looks like there are a bunch of options:

- NO ACTION (default)
- RESTRICT: application is prohibited from deleting a parent key when there exists one or more child keys mapped to it
- SET NULL: when a parent key is deleted the child key columns of all rows in the child table that mapped to the parent key are set to contain SQL NULL values
- SET DEFAULT: set a specific default
- CASCADE: propagates the delete or update operation on the parent key to each dependent child key","{""total_count"": 1, ""+1"": 1, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",1595340692,