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
Reset
— 4
The Burning Machine 7 Octavia Butler Scifi 10.40 € — ✓
The Endless Empire 41 Kim Robinson and Ted Chiang Scifi 30.81 € — ✓
The Distant Dune 86 Adrian Tchaikovsky and Stanisław Lem Scifi 41.33 € — ✓
The Luminous Empire 113 Ted Chiang, Mary Shelley, and Kim Robinson Scifi 31.61 € — ✓
Tor Books 4
Ace 8
Orbit 2
Gollancz 4
DAW 8
Del Rey 7
The Broken Dune 10 Liu Cixin, Margaret Atwood, and Martha Wells Scifi 13.54 € Del Rey ✓
The Endless Forest 18 Octavia Butler, Ann Leckie, and Liu Cixin Scifi 11.84 € Del Rey ✓
The Distant Station 28 Liu Cixin Scifi 15.62 € Del Rey ✓
The Silent Signal 57 Frank Herbert Scifi 24.90 € Del Rey ✓
The Silent Signal 71 Margaret Atwood, Ursula Le Guin, and Iain Banks Scifi 35.42 € Del Rey ✓
The Quiet Forest 81 Kim Robinson and Joe Abercrombie Scifi 37.94 € Del Rey ✓
The Quiet Signal 91 Kim Robinson Scifi 9.09 € Del Rey ✓
Vintage 5
The Silent Tower 3 Stanisław Lem and Martha Wells Scifi 43.93 € Vintage ✓
The Luminous City 45 Kim Robinson, Stanisław Lem, and Ann Leckie Scifi 40.14 € Vintage ✓
The Dispossessed Station 58 Joe Abercrombie, Ursula Le Guin, and Iain Banks Scifi 22.59 € Vintage ✓
The Hidden Station 66 Octavia Butler and Iain Banks Scifi 40.83 € Vintage ✓
The Distant Station 77 Iain Banks Scifi 38.94 € Vintage ✓