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
— 8
Tor Books 6
Ace 5
The Quiet Forest 8 Becky Chambers Fiction 11.98 € Ace ✗
The Endless Signal 33 Adrian Tchaikovsky Fiction 39.74 € Ace ✓
The Burning Station 50 Ursula Le Guin and Octavia Butler Fiction 14.43 € Ace ✓
The Luminous Engine 76 Mary Shelley Fiction 34.79 € Ace ✓
The Dispossessed Door 103 Iain Banks and Frank Herbert Fiction 30.10 € Ace ✗
Orbit 4
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 Broken Empire 48 Ted Chiang and Ann Leckie Fiction 30.49 € Orbit ✗
The Distant Station 86 Frank Herbert and Mary Shelley Fiction 12.86 € Orbit ✓
Gollancz 4
DAW 6
Del Rey 2
The Endless Winter 25 Ann Leckie Fiction 41.02 € Del Rey ✓
The Ancient Ocean 53 Martha Wells and Ursula Le Guin Fiction 25.74 € Del Rey ✓
Vintage 8