claude@clouddev1
52860c3267
Three more casts on "doing" pages:
- first-project reuses the quickstart cast (the create→insert→show tour)
- modes (new): a simple command, then `mode advanced` where the same command
also prints "Executing SQL: …" (the teaching echo — "learn the SQL underneath")
- undo-redo (new): insert two rows, `undo` (Y-confirm modal) backs one out,
`redo` restores it
Also fix the cast endings (review feedback): scripts ended by typing a `quit`
command, which — once the trim drops the shell exit — left a dangling "quit" in
frame with no payoff. End every cast with Ctrl-C instead (the app's quit key,
KeyCode::Char('c')+CTRL): it types nothing, so the cast ends cleanly on the
last content frame. Generator gains a `CtrlC` key; all six casts regenerated.
Convert the three pages to .mdx and embed. Build clean (26 pages); 6 casts.
44 lines
1.2 KiB
Plaintext
44 lines
1.2 KiB
Plaintext
---
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title: Undo, redo & history
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description: Step back from any change, and replay a recorded session.
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sidebar:
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order: 5
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---
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import Demo from '../../../components/Demo.astro';
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Every change you make is safe to undo — the playground snapshots the whole
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project before each one.
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<Demo src="/casts/undo-redo.cast" title="Undo a row back out, then redo it — each step asks for confirmation." />
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## Undo and redo
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```rdbms
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undo
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```
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```rdbms
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redo
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```
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Each asks you to confirm, naming the exact command being undone or
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re-applied. Redo is available until you make a new change. (How snapshots
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work is explained in [Concepts](/concepts/projects-and-storage/).)
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Starting with `--no-undo` turns this off for the session — no snapshot is
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taken before each change, and `undo`/`redo` report that undo is off.
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## History and replay
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Every command you run is recorded, in order, in the project's `history.log`.
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You can re-run a saved sequence of commands from a file:
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```rdbms
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replay path/to/commands
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```
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Replay runs each non-blank, non-`#`-comment line, stopping at the first error
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(relative paths resolve under the project directory). It re-applies the
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schema- and data-changing commands and skips app-level ones.
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