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
— 10
Tor Books 13
The Hidden Garden 16 Joe Abercrombie, Ted Chiang, and Becky Chambers Fiction 30.44 € Tor Books ✓
The Quiet Machine 31 Margaret Atwood Fiction 21.83 € Tor Books ✓
The Ancient Engine 32 Octavia Butler Fiction 33.11 € Tor Books ✓
The Endless Door 39 Joe Abercrombie Scifi 18.58 € Tor Books ✓
The Endless Station 47 Joe Abercrombie and Kim Robinson Fiction 26.37 € Tor Books ✓
The Hidden Mirror 48 Adrian Tchaikovsky Scifi 21.19 € Tor Books ✓
The Endless Signal 50 Mary Shelley, Ursula Le Guin, and Ted Chiang Nonfiction 26.36 € Tor Books ✓
The Dispossessed Door 51 Stanisław Lem and Becky Chambers Nonfiction 36.10 € Tor Books ✓
The Dispossessed Ocean 67 Martha Wells Fiction 40.62 € Tor Books ✗
The Broken Ocean 68 Kim Robinson and Stanisław Lem Nonfiction 6.07 € Tor Books ✗
The Burning Garden 103 Stanisław Lem and Iain Banks Nonfiction 38.50 € Tor Books ✓
The Hidden Station 109 Becky Chambers, Joe Abercrombie, and Ursula Le Guin Scifi 37.73 € Tor Books ✓
The Endless Station 116 Octavia Butler and Joe Abercrombie Scifi 7.61 € Tor Books ✓
Ace 15
Orbit 14
Gollancz 11
DAW 15
The Endless Mirror 20 Stanisław Lem and Ted Chiang Scifi 21.82 € DAW ✓
The Luminous Ocean 25 Margaret Atwood Fiction 37.67 € DAW ✓
The Burning City 27 Ann Leckie Nonfiction 29.92 € DAW ✓
The Silent Door 29 Iain Banks Nonfiction 38.24 € DAW ✓
The Endless Mirror 33 Frank Herbert Scifi 39.79 € DAW ✓
The Dispossessed Engine 36 Kim Robinson and Mary Shelley Scifi 23.93 € DAW ✓
The Broken Engine 46 Ted Chiang and Octavia Butler Scifi 5.74 € DAW ✓
The Broken Door 53 Adrian Tchaikovsky, Ted Chiang, and Margaret Atwood Scifi 33.91 € DAW ✓
The Silent Forest 62 Frank Herbert, Liu Cixin, and Stanisław Lem Scifi 35.70 € DAW ✓
The Burning Station 87 Adrian Tchaikovsky and Joe Abercrombie Fiction 15.13 € DAW ✓
The Endless Ocean 92 Liu Cixin Scifi 42.02 € DAW ✓
The Hidden Archive 98 Martha Wells and Ursula Le Guin Scifi 27.03 € DAW ✗
The Broken Door 100 Stanisław Lem Nonfiction 26.98 € DAW ✓
The Luminous City 105 Liu Cixin, Stanisław Lem, and Iain Banks Nonfiction 22.63 € DAW ✓
The Dispossessed Archive 114 Octavia Butler and Joe Abercrombie Fiction 8.47 € DAW ✓
Baen 10
Del Rey 13
Vintage 19
The Endless Mirror 2 Ann Leckie, Mary Shelley, and Ursula Le Guin Nonfiction 28.63 € Vintage ✓
The Silent Tower 3 Stanisław Lem and Martha Wells Scifi 43.93 € Vintage ✓
The Broken Engine 4 Liu Cixin, Ann Leckie, and Ursula Le Guin Fiction 12.63 € Vintage ✓
The Endless Empire 5 Ann Leckie Nonfiction 25.88 € Vintage ✓
The Ancient Ocean 44 Becky Chambers Nonfiction 25.72 € 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 Silent Mirror 60 Ann Leckie and Kim Robinson Nonfiction 25.07 € Vintage ✓
The Hidden Station 66 Octavia Butler and Iain Banks Scifi 40.83 € Vintage ✓
The Quiet Dune 76 Mary Shelley Nonfiction 24.14 € Vintage ✗
The Distant Station 77 Iain Banks Scifi 38.94 € Vintage ✓
The Silent Tower 78 Adrian Tchaikovsky Fiction 16.99 € Vintage ✓
The Hidden Winter 82 Joe Abercrombie, Ann Leckie, and Mary Shelley Fiction 12.30 € Vintage ✓
The Endless Winter 84 Iain Banks Nonfiction 34.31 € Vintage ✗
The Broken Mirror 96 Stanisław Lem Fiction 34.38 € Vintage ✗
The Ancient Engine 101 Adrian Tchaikovsky Fiction 37.89 € Vintage ✓
The Silent Dune 107 Stanisław Lem and Octavia Butler Nonfiction 17.86 € Vintage ✗
The Broken Winter 108 Ted Chiang Fiction 32.73 € Vintage ✓
The Endless City 112 Ann Leckie and Stanisław Lem Fiction 23.04 € Vintage ✓