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

Reset
Cover Title Author names Genre Price Publisher Active
Reset
— 16
Tor Books 11
Ace 12
Orbit 6
The Hidden Winter 32 Kim Robinson, Stanisław Lem, and Margaret Atwood Scifi 40.79 € Orbit ✓
The Ancient Garden 43 Frank Herbert, Iain Banks, and Becky Chambers Fiction 42.67 € Orbit ✓
The Distant Engine 46 Margaret Atwood and Ted Chiang Fiction 21.25 € Orbit ✓
The Ancient Forest 56 Iain Banks, Ursula Le Guin, and Kim Robinson Scifi 33.64 € Orbit ✓
The Distant Station 86 Frank Herbert and Mary Shelley Fiction 12.86 € Orbit ✓
The Hidden Door 106 Martha Wells, Mary Shelley, and Stanisław Lem Nonfiction 19.30 € Orbit ✓
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
The Dispossessed Station 12 Martha Wells and Ann Leckie Nonfiction 16.58 € Baen ✓
The Burning Door 36 Kim Robinson Nonfiction 31.42 € Baen ✓
The Silent Tower 39 Ann Leckie, Mary Shelley, and Ursula Le Guin Nonfiction 25.60 € Baen ✓
The Distant Tower 63 Iain Banks, Liu Cixin, and Joe Abercrombie Scifi 18.55 € Baen ✓
The Luminous Forest 68 Liu Cixin, Ann Leckie, and Ursula Le Guin Nonfiction 40.60 € Baen ✓
The Endless Ocean 105 Liu Cixin and Kim Robinson Scifi 34.90 € Baen ✓
The Burning Station 110 Mary Shelley Nonfiction 24.38 € Baen ✓
Del Rey 10
Vintage 14