Grouped table

Group by publisher Group by genre
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
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— 16
Tor Books 11
The Endless Dune 17 Joe Abercrombie, Mary Shelley, and Stanisław Lem Fiction 18.69 € Tor Books ✓
The Endless Winter 28 Iain Banks, Liu Cixin, and Ted Chiang Fiction 29.97 € Tor Books ✓
The Broken Mirror 37 Margaret Atwood and Octavia Butler Nonfiction 7.28 € Tor Books ✓
The Distant Forest 38 Adrian Tchaikovsky and Octavia Butler Fiction 38.71 € Tor Books ✓
The Ancient Garden 42 Iain Banks Fiction 35.86 € Tor Books ✓
The Hidden Station 44 Margaret Atwood, Martha Wells, and Becky Chambers Scifi 12.11 € Tor Books ✓
The Ancient Machine 51 Ann Leckie and Ursula Le Guin Nonfiction 40.77 € Tor Books ✓
The Ancient Dune 67 Mary Shelley and Ann Leckie Fiction 38.41 € Tor Books ✓
The Quiet Door 87 Ted Chiang Scifi 35.06 € Tor Books ✓
The Quiet Tower 90 Octavia Butler, Ted Chiang, and Margaret Atwood Nonfiction 31.01 € Tor Books ✓
The Quiet Station 95 Adrian Tchaikovsky, Ursula Le Guin, and Stanisław Lem Fiction 6.29 € Tor Books ✓
Ace 12
Orbit 6
Gollancz 9
DAW 12
The Distant City 10 Stanisław Lem, Ted Chiang, and Liu Cixin Scifi 26.91 € DAW ✓
The Quiet City 27 Frank Herbert Scifi 39.79 € DAW ✓
The Dispossessed Winter 29 Ted Chiang and Ann Leckie Nonfiction 9.04 € DAW ✓
The Silent Archive 40 Ann Leckie Scifi 41.43 € DAW ✓
The Dispossessed City 66 Octavia Butler Scifi 29.12 € DAW ✓
The Luminous City 85 Liu Cixin, Stanisław Lem, and Iain Banks Nonfiction 22.63 € DAW ✓
The Ancient Forest 93 Liu Cixin and Kim Robinson Fiction 41.21 € DAW ✓
The Endless Engine 97 Becky Chambers Nonfiction 43.50 € DAW ✓
The Endless Mirror 98 Adrian Tchaikovsky, Martha Wells, and Ann Leckie Nonfiction 33.32 € DAW ✓
The Hidden Garden 99 Frank Herbert Fiction 24.11 € DAW ✓
The Distant Archive 111 Frank Herbert Nonfiction 11.59 € DAW ✓
The Silent Station 120 Martha Wells, Becky Chambers, and Mary Shelley Scifi 42.11 € DAW ✓
Baen 7
Del Rey 10
Vintage 14