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
— 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
The Burning Tower 20 Ann Leckie Scifi 14.56 € Ace ✓
The Endless Winter 30 Octavia Butler Scifi 39.19 € Ace ✓
The Luminous City 57 Adrian Tchaikovsky, Frank Herbert, and Margaret Atwood Scifi 23.17 € Ace ✓
The Broken Empire 58 Martha Wells Scifi 34.83 € Ace ✓
The Dispossessed Archive 82 Octavia Butler and Ted Chiang Scifi 35.72 € Ace ✓
The Hidden Tower 91 Adrian Tchaikovsky, Frank Herbert, and Kim Robinson Scifi 29.28 € Ace ✓
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
Del Rey 4
The Endless Forest 15 Octavia Butler, Ann Leckie, and Liu Cixin Scifi 11.84 € Del Rey ✓
The Ancient Signal 16 Joe Abercrombie Scifi 35.51 € Del Rey ✗
The Endless Signal 73 Frank Herbert, Iain Banks, and Margaret Atwood Scifi 19.39 € Del Rey ✓
The Distant Engine 83 Martha Wells, Liu Cixin, and Ursula Le Guin Scifi 39.52 € Del Rey ✓
Vintage 5