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
— 4
Tor Books 3
Ace 5
The Hidden Mirror 14 Ursula Le Guin and Kim Robinson Nonfiction 22.58 € Ace ✗
The Distant Garden 34 Ted Chiang Nonfiction 25.55 € Ace ✓
The Luminous Mirror 84 Kim Robinson and Ann Leckie Nonfiction 19.40 € Ace ✗
The Luminous Tower 88 Frank Herbert, Liu Cixin, and Ursula Le Guin Nonfiction 37.25 € Ace ✓
The Ancient Archive 114 Frank Herbert, Kim Robinson, and Margaret Atwood Nonfiction 44.21 € Ace ✓
Orbit 3
Gollancz 3
DAW 7
The Dispossessed Winter 29 Ted Chiang and Ann Leckie Nonfiction 9.04 € DAW ✓
The Silent Station 60 Becky Chambers, Octavia Butler, and Margaret Atwood Nonfiction 34.96 € DAW ✗
The Broken Station 61 Octavia Butler Nonfiction 18.89 € DAW ✗
The Luminous City 85 Liu Cixin, Stanisław Lem, and Iain Banks Nonfiction 22.63 € 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 Distant Archive 111 Frank Herbert Nonfiction 11.59 € DAW ✓
Baen 6
Del Rey 6
Vintage 2
The Endless Mirror 2 Ann Leckie, Mary Shelley, and Ursula Le Guin Nonfiction 28.63 € Vintage ✓
The Quiet Dune 62 Mary Shelley Nonfiction 24.14 € Vintage ✗