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

Cover Title Author names Genre Price Publisher Active
— 19
Tor Books 11
The Endless Dune 17 Joe Abercrombie, Mary Shelley, and Stanisław Lem Fiction 18.69 € Tor Books ✓
The Endless Winter 28 Iain Banks, Liu Cixin, and Ted Chiang Fiction 29.97 € Tor Books ✓
The Broken Mirror 37 Margaret Atwood and Octavia Butler Nonfiction 7.28 € Tor Books ✓
The Distant Forest 38 Adrian Tchaikovsky and Octavia Butler Fiction 38.71 € Tor Books ✓
The Ancient Garden 42 Iain Banks Fiction 35.86 € Tor Books ✓
The Hidden Station 44 Margaret Atwood, Martha Wells, and Becky Chambers Scifi 12.11 € Tor Books ✓
The Ancient Machine 51 Ann Leckie and Ursula Le Guin Nonfiction 40.77 € Tor Books ✓
The Ancient Dune 67 Mary Shelley and Ann Leckie Fiction 38.41 € Tor Books ✓
The Quiet Door 87 Ted Chiang Scifi 35.06 € Tor Books ✓
The Quiet Tower 90 Octavia Butler, Ted Chiang, and Margaret Atwood Nonfiction 31.01 € Tor Books ✓
The Quiet Station 95 Adrian Tchaikovsky, Ursula Le Guin, and Stanisław Lem Fiction 6.29 € Tor Books ✓
Ace 16
Orbit 9
Gollancz 11
The Broken Engine 9 Ted Chiang, Ann Leckie, and Frank Herbert Fiction 32.99 € Gollancz ✗
The Quiet Door 18 Becky Chambers Scifi 21.79 € Gollancz ✗
The Ancient Mirror 24 Mary Shelley Fiction 33.42 € Gollancz ✓
The Distant Door 26 Ann Leckie, Iain Banks, and Liu Cixin Nonfiction 16.40 € Gollancz ✓
The Silent Station 70 Octavia Butler Scifi 34.46 € Gollancz ✓
The Distant Dune 72 Octavia Butler and Margaret Atwood Scifi 32.20 € Gollancz ✓
The Ancient Ocean 74 Margaret Atwood Nonfiction 14.70 € Gollancz ✓
The Hidden Dune 79 Martha Wells and Ursula Le Guin Fiction 24.25 € Gollancz ✓
The Distant Winter 96 Martha Wells and Becky Chambers Fiction 10.36 € Gollancz ✓
The Broken City 102 Ann Leckie, Margaret Atwood, and Frank Herbert Nonfiction 40.54 € Gollancz ✓
The Dispossessed Signal 112 Ted Chiang and Frank Herbert Scifi 38.73 € Gollancz ✓
DAW 19
Baen 8
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 Luminous City 45 Ann Leckie, Kim Robinson, and Octavia Butler Nonfiction 19.30 € 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 12
Vintage 15