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
— 10
Tor Books 11
		The Hidden Garden 16	Joe Abercrombie, Ted Chiang, and Becky Chambers	Fiction	30.44 €	Tor Books	✓
		The Quiet Machine 31	Margaret Atwood	Fiction	21.83 €	Tor Books	✓
		The Ancient Engine 32	Octavia Butler	Fiction	33.11 €	Tor Books	✓
		The Endless Door 39	Joe Abercrombie	Scifi	18.58 €	Tor Books	✓
		The Endless Station 47	Joe Abercrombie and Kim Robinson	Fiction	26.37 €	Tor Books	✓
		The Hidden Mirror 48	Adrian Tchaikovsky	Scifi	21.19 €	Tor Books	✓
		The Endless Signal 50	Mary Shelley, Ursula Le Guin, and Ted Chiang	Nonfiction	26.36 €	Tor Books	✓
		The Dispossessed Door 51	Stanisław Lem and Becky Chambers	Nonfiction	36.10 €	Tor Books	✓
		The Burning Garden 103	Stanisław Lem and Iain Banks	Nonfiction	38.50 €	Tor Books	✓
		The Hidden Station 109	Becky Chambers, Joe Abercrombie, and Ursula Le Guin	Scifi	37.73 €	Tor Books	✓
		The Endless Station 116	Octavia Butler and Joe Abercrombie	Scifi	7.61 €	Tor Books	✓
Ace 12
		The Ancient Door 34	Margaret Atwood and Mary Shelley	Fiction	32.79 €	Ace	✓
		The Hidden Mirror 35	Ann Leckie	Fiction	27.24 €	Ace	✓
		The Endless Winter 37	Octavia Butler	Scifi	39.19 €	Ace	✓
		The Hidden Machine 38	Joe Abercrombie and Ann Leckie	Scifi	38.74 €	Ace	✓
		The Broken Machine 42	Ted Chiang	Nonfiction	25.55 €	Ace	✓
		The Silent Forest 59	Stanisław Lem	Scifi	14.46 €	Ace	✓
		The Luminous Garden 65	Liu Cixin and Ursula Le Guin	Scifi	6.67 €	Ace	✓
		The Luminous Mirror 70	Adrian Tchaikovsky, Frank Herbert, and Margaret Atwood	Scifi	8.90 €	Ace	✓
		The Burning Signal 83	Frank Herbert	Scifi	42.17 €	Ace	✓
		The Luminous Empire 93	Ann Leckie	Scifi	14.02 €	Ace	✓
		The Distant Dune 104	Becky Chambers and Iain Banks	Fiction	25.09 €	Ace	✓
		The Distant Winter 118	Joe Abercrombie	Fiction	16.33 €	Ace	✓
Orbit 13
Gollancz 9
DAW 14
		The Endless Mirror 20	Stanisław Lem and Ted Chiang	Scifi	21.82 €	DAW	✓
		The Luminous Ocean 25	Margaret Atwood	Fiction	37.67 €	DAW	✓
		The Burning City 27	Ann Leckie	Nonfiction	29.92 €	DAW	✓
		The Silent Door 29	Iain Banks	Nonfiction	38.24 €	DAW	✓
		The Endless Mirror 33	Frank Herbert	Scifi	39.79 €	DAW	✓
		The Dispossessed Engine 36	Kim Robinson and Mary Shelley	Scifi	23.93 €	DAW	✓
		The Broken Engine 46	Ted Chiang and Octavia Butler	Scifi	5.74 €	DAW	✓
		The Broken Door 53	Adrian Tchaikovsky, Ted Chiang, and Margaret Atwood	Scifi	33.91 €	DAW	✓
		The Silent Forest 62	Frank Herbert, Liu Cixin, and Stanisław Lem	Scifi	35.70 €	DAW	✓
		The Burning Station 87	Adrian Tchaikovsky and Joe Abercrombie	Fiction	15.13 €	DAW	✓
		The Endless Ocean 92	Liu Cixin	Scifi	42.02 €	DAW	✓
		The Broken Door 100	Stanisław Lem	Nonfiction	26.98 €	DAW	✓
		The Luminous City 105	Liu Cixin, Stanisław Lem, and Iain Banks	Nonfiction	22.63 €	DAW	✓
		The Dispossessed Archive 114	Octavia Butler and Joe Abercrombie	Fiction	8.47 €	DAW	✓
Baen 10
Del Rey 11
Vintage 15