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
The Quiet Forest 8 Becky Chambers Fiction 11.98 € Ace ✗
The Hidden Mirror 14 Ursula Le Guin and Kim Robinson Nonfiction 22.58 € Ace ✗
The Burning Tower 20 Ann Leckie Scifi 14.56 € Ace ✓
The Endless Winter 30 Octavia Butler Scifi 39.19 € Ace ✓
The Endless Signal 33 Adrian Tchaikovsky Fiction 39.74 € Ace ✓
The Distant Garden 34 Ted Chiang Nonfiction 25.55 € Ace ✓
The Burning Station 50 Ursula Le Guin and Octavia Butler Fiction 14.43 € 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 Luminous Engine 76 Mary Shelley Fiction 34.79 € Ace ✓
The Dispossessed Archive 82 Octavia Butler and Ted Chiang Scifi 35.72 € 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 Hidden Tower 91 Adrian Tchaikovsky, Frank Herbert, and Kim Robinson Scifi 29.28 € Ace ✓
The Dispossessed Door 103 Iain Banks and Frank Herbert Fiction 30.10 € Ace ✗
The Ancient Archive 114 Frank Herbert, Kim Robinson, and Margaret Atwood Nonfiction 44.21 € Ace ✓
Orbit 9
Gollancz 11
DAW 19
The Ancient Winter 3 Joe Abercrombie Fiction 24.81 € DAW ✗
The Distant City 10 Stanisław Lem, Ted Chiang, and Liu Cixin Scifi 26.91 € DAW ✓
The Endless Station 13 Ann Leckie, Martha Wells, and Ursula Le Guin Fiction 27.05 € 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 Dispossessed Winter 29 Ted Chiang and Ann Leckie Nonfiction 9.04 € DAW ✓
The Silent Archive 40 Ann Leckie Scifi 41.43 € 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 Dispossessed City 66 Octavia Butler Scifi 29.12 € DAW ✓
The Luminous City 85 Liu Cixin, Stanisław Lem, and Iain Banks Nonfiction 22.63 € DAW ✓
The Ancient Forest 93 Liu Cixin and Kim Robinson Fiction 41.21 € 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 Hidden Garden 99 Frank Herbert Fiction 24.11 € DAW ✓
The Distant Archive 111 Frank Herbert Nonfiction 11.59 € DAW ✓
The Burning Empire 118 Kim Robinson, Mary Shelley, and Margaret Atwood Fiction 17.01 € DAW ✗
The Ancient Archive 119 Octavia Butler and Mary Shelley Fiction 21.49 € DAW ✗
The Silent Station 120 Martha Wells, Becky Chambers, and Mary Shelley Scifi 42.11 € DAW ✓
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