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
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 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 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
The Ancient Ocean 17 Martha Wells, Ted Chiang, and Stanisław Lem Fiction 34.01 € Baen ✓
The Ancient Ocean 19 Frank Herbert Fiction 43.54 € Baen ✓
The Hidden Door 22 Frank Herbert Fiction 30.21 € Baen ✓
The Endless Tower 30 Liu Cixin, Ted Chiang, and Becky Chambers Nonfiction 38.98 € Baen ✓
The Ancient Mirror 56 Stanisław Lem and Joe Abercrombie Nonfiction 37.08 € Baen ✓
The Broken Dune 63 Liu Cixin and Mary Shelley Fiction 6.27 € Baen ✓
The Luminous Ocean 64 Becky Chambers and Stanisław Lem Fiction 33.85 € Baen ✓
The Ancient Signal 88 Becky Chambers and Frank Herbert Fiction 19.15 € Baen ✓
The Hidden Door 95 Mary Shelley Fiction 21.22 € Baen ✓
The Luminous Empire 97 Liu Cixin Fiction 13.61 € Baen ✓
Del Rey 11
Vintage 15