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

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Cover Title Author names Genre Price Publisher Active
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— 10
Tor Books 11
Ace 12
The Ancient Door 34 Margaret Atwood and Mary Shelley Fiction 32.79 € Ace ✓
The Hidden Mirror 35 Ann Leckie Fiction 27.24 € Ace ✓
The Endless Winter 37 Octavia Butler Scifi 39.19 € Ace ✓
The Hidden Machine 38 Joe Abercrombie and Ann Leckie Scifi 38.74 € Ace ✓
The Broken Machine 42 Ted Chiang Nonfiction 25.55 € Ace ✓
The Silent Forest 59 Stanisław Lem Scifi 14.46 € Ace ✓
The Luminous Garden 65 Liu Cixin and Ursula Le Guin Scifi 6.67 € Ace ✓
The Luminous Mirror 70 Adrian Tchaikovsky, Frank Herbert, and Margaret Atwood Scifi 8.90 € Ace ✓
The Burning Signal 83 Frank Herbert Scifi 42.17 € Ace ✓
The Luminous Empire 93 Ann Leckie Scifi 14.02 € Ace ✓
The Distant Dune 104 Becky Chambers and Iain Banks Fiction 25.09 € Ace ✓
The Distant Winter 118 Joe Abercrombie Fiction 16.33 € Ace ✓
Orbit 13
Gollancz 9
DAW 14
Baen 10
Del Rey 11
Vintage 15
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 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 Ancient Engine 101 Adrian Tchaikovsky Fiction 37.89 € Vintage ✓
The Broken Winter 108 Ted Chiang Fiction 32.73 € Vintage ✓
The Endless City 112 Ann Leckie and Stanisław Lem Fiction 23.04 € Vintage ✓