Grouped table

How this page is built the gem renders it — this is all you write

Grouping is a render-time arrangement, like the layout. Add group_by: :publisher — the gem orders by the group key, splits the rows into collapsible groups (chevron in the header) and shows a per-group count. With 120 books, groups start collapsed beyond config.group_collapse_threshold (default 50), opening only the first; the open ones live in ?open=, so a half-expanded view is copy-pasteable.

app/views/groups/index.html.erb

<%= crud_collection @books, group_by: :publisher %>   <%# belongs_to, enum or a column %>

Read more: Grouping

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	Cover	Title	Author names	Genre	Price	Publisher	Active
								Reset
— 6
		The Dispossessed City 4	Kim Robinson, Margaret Atwood, and Adrian Tchaikovsky	Fiction	19.95 €	—	✓
		The Hidden Archive 22	Becky Chambers, Mary Shelley, and Frank Herbert	Fiction	23.21 €	—	✓
		The Distant Garden 52	Joe Abercrombie and Ursula Le Guin	Fiction	36.80 €	—	✓
		The Dispossessed Forest 64	Liu Cixin	Fiction	36.11 €	—	✓
		The Broken Forest 104	Octavia Butler and Frank Herbert	Fiction	17.49 €	—	✓
		The Silent Archive 116	Ted Chiang and Joe Abercrombie	Fiction	10.28 €	—	✓
Tor Books 6
Ace 3
Orbit 3
Gollancz 3
DAW 2
Del Rey 2
Vintage 8