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

Reset
	Cover	Title	Author names	Genre	Price	Publisher	Active
								Reset
— 7
		The Burning Winter 6	Octavia Butler	Scifi	21.78 €	—	✓
		The Endless Station 11	Joe Abercrombie	Scifi	10.86 €	—	✓
		The Ancient Engine 71	Becky Chambers	Scifi	32.68 €	—	✓
		The Hidden Engine 78	Iain Banks	Scifi	8.00 €	—	✗
		The Dispossessed Empire 89	Kim Robinson and Joe Abercrombie	Scifi	11.61 €	—	✓
		The Hidden Door 107	Iain Banks and Mary Shelley	Scifi	17.84 €	—	✓
		The Endless Empire 117	Becky Chambers and Ted Chiang	Scifi	29.30 €	—	✓
Tor Books 2
Ace 6
Orbit 2
Gollancz 4
DAW 6
		The Distant City 10	Stanisław Lem, Ted Chiang, and Liu Cixin	Scifi	26.91 €	DAW	✓
		The Hidden Engine 23	Stanisław Lem, Adrian Tchaikovsky, and Becky Chambers	Scifi	40.55 €	DAW	✗
		The Quiet City 27	Frank Herbert	Scifi	39.79 €	DAW	✓
		The Silent Archive 40	Ann Leckie	Scifi	41.43 €	DAW	✓
		The Dispossessed City 66	Octavia Butler	Scifi	29.12 €	DAW	✓
		The Silent Station 120	Martha Wells, Becky Chambers, and Mary Shelley	Scifi	42.11 €	DAW	✓
Baen 2
		The Distant Tower 63	Iain Banks, Liu Cixin, and Joe Abercrombie	Scifi	18.55 €	Baen	✓
		The Endless Ocean 105	Liu Cixin and Kim Robinson	Scifi	34.90 €	Baen	✓
Del Rey 4
Vintage 5