---
id: ML-169.9
title: "Fix: Full stream resets on pagination within same search"
status: To Do
assignee: []
created_date: "2026-05-19 11:48"
labels:
  - perf
  - fix
dependencies: []
references:
  - >-
    backlog/documents/doc-27 -
    Phase-4-Performance-Audit-Low-Hanging-Fruit-Findings.md
modified_files:
  - lib/music_library_web/live_helpers/index_actions.ex
  - lib/music_library_web/live/scrobbled_tracks_live/index.ex
  - lib/music_library_web/live/artist_live/show.ex
parent_task_id: ML-169
priority: medium
ordinal: 30000
---

## Description

<!-- SECTION:DESCRIPTION:BEGIN -->

Optimize stream behavior so that pagination within the same search does not trigger a full `stream(..., reset: true)`. Search and order changes still legitimately need resets.

## Problem

Every search query change, order toggle, or **pagination click** triggers a full `stream(..., reset: true)`. While `reset: true` is correct when the entire dataset changes (new search query), it's unnecessary for pagination within the same search — the existing items don't change, only new ones are appended.

## Files

- `lib/music_library_web/live_helpers/index_actions.ex:89` — `load_and_assign_records` uses `reset: true`
- `lib/music_library_web/live/scrobbled_tracks_live/index.ex:334` — `load_and_assign_tracks` uses `reset: true`
- `lib/music_library_web/live/artist_live/show.ex:698-699` — `assign_records` uses `reset: true`

## Fix

Use `stream(..., at: -1)` (append) for "load more" pagination. Only use `reset: true` when search text or order field changes. This requires distinguishing between a "new search" and "same search, next page" in the pagination handler.

<!-- SECTION:DESCRIPTION:END -->

## Acceptance Criteria

<!-- AC:BEGIN -->

- [ ] #1 Pagination to next page appends records without full stream reset
- [ ] #2 Existing stream items remain visible during pagination
- [ ] #3 Search query change still triggers full stream reset
- [ ] #4 Order change still triggers full stream reset
- [ ] #5 No duplicate records appear after multiple pagination clicks
<!-- AC:END -->
