⚡ Bolt: [performance improvement] In-memory subset derivation to prevent redundant API queries#203
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Co-authored-by: aicoder2009 <127642633+aicoder2009@users.noreply.github.com>
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📝 WalkthroughWalkthroughThe project page's data fetching logic was refactored to fetch only the project and global lists endpoints concurrently, then derive the project-specific lists by filtering the global lists collection in-memory by projectId. A documentation entry describing this pattern was also added. ChangesIn-Memory List Subset Derivation
Estimated code review effort: 2 (Simple) | ~10 minutes Sequence Diagram(s)sequenceDiagram
participant ProjectPage
participant ProjectsAPI
participant ListsAPI
ProjectPage->>ProjectsAPI: fetch /api/projects/[id]
ProjectPage->>ListsAPI: fetch /api/lists
ProjectsAPI-->>ProjectPage: project JSON
ListsAPI-->>ProjectPage: allLists JSON
ProjectPage->>ProjectPage: filter allLists by projectId to derive lists
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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Pull request overview
This PR optimizes the Project Details page’s data loading by removing a redundant project-lists API request and instead deriving the project-specific subset from the already-fetched global lists collection.
Changes:
- Removed
fetch("/api/projects/[id]/lists")fromProjectDetailPageand now deriveslistsvia an in-memory.filter()on/api/listsresults. - Updated internal “Bolt” learnings documentation to record the in-memory subset derivation pattern.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| src/app/projects/[id]/page.tsx | Removes redundant project-lists fetch and derives project lists from the global lists response in-memory. |
| .jules/bolt.md | Documents the “in-memory subset derivation” optimization learning/action. |
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| if (allListsResult.success) { | ||
| setAllLists(allListsResult.data); | ||
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| // Derive subset in-memory to prevent duplicate backend queries | ||
| const projectLists = (allListsResult.data as List[]).filter((l) => l.projectId === projectId); | ||
| setLists(projectLists); | ||
| } |
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Actionable comments posted: 1
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@src/app/projects/`[id]/page.tsx:
- Around line 84-90: The project page in the `[id]/page.tsx` flow silently does
nothing when the `/api/lists` fetch fails because `allListsResult` is the only
source for both `allLists` and `lists`. Update the data-loading logic around the
`allListsResult` handling to surface an error state when the fetch is
unsuccessful, and make sure the UI renders a failure/empty-state message instead
of defaulting to “0 lists.” Use the existing page state and fetch path in
`ProjectPage` to set an error flag/message alongside `setAllLists` and
`setLists`.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
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📒 Files selected for processing (2)
.jules/bolt.mdsrc/app/projects/[id]/page.tsx
| if (allListsResult.success) { | ||
| setAllLists(allListsResult.data); | ||
|
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| // Derive subset in-memory to prevent duplicate backend queries | ||
| const projectLists = (allListsResult.data as List[]).filter((l) => l.projectId === projectId); | ||
| setLists(projectLists); | ||
| } |
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🩺 Stability & Availability | 🟡 Minor | ⚡ Quick win
Silent no-op if the /api/lists fetch fails.
Since lists is now derived exclusively from allListsResult, a failed/unsuccessful /api/lists response leaves both allLists and lists unset with no error surfaced to the user — the project page will silently render "0 lists" instead of indicating a load failure.
💡 Suggested fix
if (allListsResult.success) {
setAllLists(allListsResult.data);
// Derive subset in-memory to prevent duplicate backend queries
const projectLists = (allListsResult.data as List[]).filter((l) => l.projectId === projectId);
setLists(projectLists);
+ } else {
+ setError(allListsResult.error || "Failed to load lists");
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| if (allListsResult.success) { | |
| setAllLists(allListsResult.data); | |
| // Derive subset in-memory to prevent duplicate backend queries | |
| const projectLists = (allListsResult.data as List[]).filter((l) => l.projectId === projectId); | |
| setLists(projectLists); | |
| } | |
| if (allListsResult.success) { | |
| setAllLists(allListsResult.data); | |
| // Derive subset in-memory to prevent duplicate backend queries | |
| const projectLists = (allListsResult.data as List[]).filter((l) => l.projectId === projectId); | |
| setLists(projectLists); | |
| } else { | |
| setError(allListsResult.error || "Failed to load lists"); | |
| } |
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@src/app/projects/`[id]/page.tsx around lines 84 - 90, The project page in the
`[id]/page.tsx` flow silently does nothing when the `/api/lists` fetch fails
because `allListsResult` is the only source for both `allLists` and `lists`.
Update the data-loading logic around the `allListsResult` handling to surface an
error state when the fetch is unsuccessful, and make sure the UI renders a
failure/empty-state message instead of defaulting to “0 lists.” Use the existing
page state and fetch path in `ProjectPage` to set an error flag/message
alongside `setAllLists` and `setLists`.
💡 What
Replaced a redundant
fetch("/api/projects/[id]/lists")request with an in-memory.filter()on the globally fetched/api/listsdata in the Project Details page (src/app/projects/[id]/page.tsx).🎯 Why
The page was simultaneously executing an API request to load the global collection (
/api/lists) and a subset of that collection (/api/projects/[id]/lists). This generated an unnecessary redundant backend database query. By utilizing the superset of data already loaded into memory, we can derive the subset directly without network overhead.📊 Impact
Reduces database load and network calls for the Project Detail page by avoiding a duplicate subset request, slightly reducing TTFB (Time to First Byte) latency for the client.
🔬 Measurement
Verify that the
src/app/projects/[id]/page.tsxnow usesfetch("/api/lists")and filters its response bylist.projectId === projectIdto populate thelistsstate, instead of performing a separate network request to/api/projects/[id]/lists. Tests remain passing.PR created automatically by Jules for task 1641397620354603407 started by @aicoder2009
Summary by CodeRabbit
Bug Fixes
Documentation