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Add per-table suggest_facets configuration option

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Allow disabling suggested facets for individual tables by setting
"suggest_facets": false in table configuration. This is useful for
tables where facet suggestions are unhelpful or too expensive, while
keeping them enabled for other tables in the same instance.

https://claude.ai/code/session_01JkWNePDCxMYKcq5qSfMo3r
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Claude 2026-02-21 01:02:37 +00:00
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49
docs/facets.rst
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@ -254,6 +254,55 @@ For the currently filtered data are there any columns which, if applied as a fac
That last point is particularly important: Datasette runs a query for every column that is displayed on a page, which could get expensive - so to avoid slow load times it sets a time limit of just 50ms for each of those queries.
This means suggested facets are unlikely to appear for tables with millions of records in them.
You can turn off suggested facets for a specific table by setting ``"suggest_facets"`` to ``false`` in the table's configuration:
.. [[[cog
from metadata_doc import metadata_example
metadata_example(cog, {
"databases": {
"mydb": {
"tables": {
"big_table": {
"suggest_facets": False
}
}
}
}
})
.. ]]]
.. tab:: metadata.yaml
.. code-block:: yaml
databases:
mydb:
tables:
big_table:
suggest_facets: false
.. tab:: metadata.json
.. code-block:: json
{
"databases": {
"mydb": {
"tables": {
"big_table": {
"suggest_facets": false
}
}
}
}
}
.. [[[end]]]
This will disable suggested facets for that table only. Other tables in the same database will continue to suggest facets as normal. Explicitly requested facets (using ``?_facet=column``) will still work.
You can also disable suggested facets for the entire Datasette instance using the :ref:`setting_suggest_facets` setting.
Speeding up facets with indexes
-------------------------------