Facets not correctly persisted in hidden form fields

[simonw]

Steps to reproduce: visit https://2a4b892.datasette.io/fixtures/roadside_attractions?_facet_m2m=attraction_characteristic and click "Apply"

Result is a 500: no such column: attraction_characteristic

The error occurs because of this hidden HTML input:

<input type="hidden" name="_facet" value="attraction_characteristic">

This should be:

<input type="hidden" name="_facet_m2m" value="attraction_characteristic">

[simonw]

Code in question:

datasette/datasette/templates/table.html

Lines 84 to 86 in 2a4b892

	{% for facet in sorted_facet_results %}
	<input type="hidden" name="_facet" value="{{ facet.name }}">
	{% endfor %}

[simonw]

I need to solve #495 first, since that may change the value that is persisted in the hidden fields.

[simonw]

Part of #551

[simonw]

I fixed this in ea340cf for #963 (a duplicate of this issue).