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
— 4
Tor Books 4
		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 Station 47	Joe Abercrombie and Kim Robinson	Fiction	26.37 €	Tor Books	✓
Ace 4
		The Ancient Door 34	Margaret Atwood and Mary Shelley	Fiction	32.79 €	Ace	✓
		The Hidden Mirror 35	Ann Leckie	Fiction	27.24 €	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 6
Gollancz 3
DAW 3
Baen 8
Del Rey 3
		The Burning Machine 8	Margaret Atwood and Becky Chambers	Fiction	38.02 €	Del Rey	✓
		The Broken Empire 43	Ursula Le Guin	Fiction	20.31 €	Del Rey	✓
		The Silent Winter 120	Iain Banks	Fiction	16.22 €	Del Rey	✓
Vintage 6