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fix: log a page request that the LiveView drops - #3977

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fix/load-more-spinnerfrom
fix/load-more-log-dropped
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chasers wants to merge 1 commit into
fix/load-more-spinnerfrom
fix/load-more-log-dropped

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@chasers

@chasers chasers commented Sep 14, 2026

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Stack 2/7 — "Load more" pagination fixes.

  • Problem: a dropped page request looks the same as an empty page.
  • Fix: log a warning when the LiveView drops load_events.
  • The log shows the intent, the cursor, and the guard state.

🤖 Generated with Claude Code

https://claude.ai/code/session_01YBPF1knvgfghTSdxuYryGL

@chasers
chasers added this pull request to stack #3983 September 14, 2026 18:44
A dropped page request was silent. The `with` fell through to
`{:noreply, socket}`, and the catch-all clause did the same. A request that the
guard or the cursor validation rejected looked like a page with no rows.

Both paths now log the intent, the cursor values and the guard state.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YBPF1knvgfghTSdxuYryGL
@chasers
chasers force-pushed the fix/load-more-spinner branch from 26ae0c0 to 9332ab7 Compare September 17, 2026 19:30
@chasers
chasers force-pushed the fix/load-more-log-dropped branch from 2748266 to 145d021 Compare September 17, 2026 19:30
@chasers
chasers removed this pull request from stack #3983 September 17, 2026 21:09
chasers added a commit that referenced this pull request Sep 17, 2026
Squashes the nine-PR load more stack into one commit: #3976, #3977, #3978,
#3979, #3980, #3981, #3982, #3984 and #3986. Merged as a unit so that main
never carries the intermediate states that #3984 corrects.

Pagination

- Keep the "Load more" spinner up until the page query returns.
- Bound a page request to the window in view and say so on the button.
- Store one page window per search in `EventPagination`. The label, the
  query, the cursor shift and the range growth all read it. The window no
  longer doubles on each click.
- Set the page window from a tail result too. A soft pause, play and pause
  used to leave the window nil and drop the next page request.
- Write an implied timestamp range into the query on a page request.
- Keep a one-sided `t:` bound when a page request makes the range explicit.
- Clamp a "next" range extension at now. Each empty click used to push the
  range max another window into the future.
- Cap the cursor of an empty "next" page at the request time.
- Remove timestamp clauses that can never match.
- Stop hiding the load more buttons on a short page.
- Disable the other button while a page request runs.
- Drop a page result or page error that no request waits for.
- Clear the page spinner when a search fails to parse.
- Log a page request that the LiveView drops.

Scrolling

- The LiveView drives every scroll. Every initial event page and every tail
  append pushes `scroll-to-bottom`. The server owns scroll intent. The hook
  owns viewport stability.

Cleanup

- Remove the unused sentinel row: the extra fetched row, `fetch_limit/0`
  and the `has_more?` field that nothing reads.
- Build the chart range in the search timezone. An implied range is no
  longer UTC written as local time.
- Remove the 750ms LiveView latency simulator in dev.

Tests

- Cover event pagination against a bigquery source and a postgres source.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
@chasers

chasers commented Sep 17, 2026

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Merged as part of the squashed stack in #3986, which landed on main as 9c9913b. The whole stack merged as one unit so that main never carried the intermediate states that #3984 corrects. This PR's commits are all included there.

@chasers chasers closed this Sep 17, 2026
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