Cache empty getDocument results by fogelito · Pull Request #924 · utopia-php/database

fogelito · 2026-07-22T13:17:31Z

Summary by CodeRabbit

Performance
- Improved handling of repeated lookups for missing documents and collections via negative caching.
- Added select/projection-aware caching for missing-document markers, reducing unnecessary cache churn.
Bug Fixes
- Newly created documents and collections now immediately replace prior “not found” cache markers.
- Locking/for-update reads no longer populate negative cache entries.
- Permission-denied reads no longer poison shared negative-cache results across different access contexts.
Tests
- Added end-to-end coverage for missing-document and missing-collection caching, invalidation on create (single and batch), projection behavior, and security.

coderabbitai · 2026-07-22T13:18:08Z

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Review details

⚙️ Run configuration

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📥 Commits

Reviewing files that changed from the base of the PR and between 0085de2 and b1203dd.

📒 Files selected for processing (1)

src/Database/Database.php

📝 Walkthrough

Walkthrough

Database now negative-caches eligible document and collection misses with an empty marker. Document creation purges matching markers using tenant-aware keys, adapter capabilities identify cache-layer support, and end-to-end tests cover projections, batch creation, locking reads, collection metadata, and security behavior.

Changes

Negative cache lifecycle

Layer / File(s)	Summary
Adapter cache capability contract `src/Database/Adapter.php`, `src/Database/Adapter/{Memory,Mongo,Pool,Redis,SQL}.php`	Adapters expose cache-layer support, with pooled delegation and adapter-specific capability values.
Negative-cache read and write path `src/Database/Database.php`	`getDocument()` recognizes cached empty markers and stores markers for eligible missing-document reads.
Creation-time cache invalidation `src/Database/Database.php`	Single and batch document creation purge tenant-aware negative-cache entries through a shared helper.
Negative-cache behavior coverage `tests/e2e/Adapter/Scopes/DocumentTests.php`	End-to-end tests cover document and collection misses, projections, creation invalidation, locking reads, and document-level security.

Estimated code review effort: 3 (Moderate) | ~30 minutes

Sequence Diagram(s)

sequenceDiagram
  participant Client
  participant Database
  participant Cache
  Client->>Database: Read missing document
  Database->>Cache: Save empty marker
  Cache-->>Database: Empty marker stored
  Client->>Database: Create document
  Database->>Cache: Purge document marker
  Cache-->>Database: Marker invalidated
  Client->>Database: Read created document
  Database-->>Client: Return document

Possibly related PRs

utopia-php/database#887: Related cache marker purge and re-caching behavior in Database.php.
utopia-php/database#888: Related forUpdate handling in getDocument() cache behavior.
utopia-php/database#904: Related lease and generation handling for getDocument() cache writes.

Suggested reviewers: abnegate

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: caching empty getDocument results via negative caching.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

Create PR with unit tests
Commit unit tests in branch cache-empty-get-document

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greptile-apps · 2026-07-22T13:19:43Z

Greptile Summary

This PR adds negative caching for missing documents and collections. The main changes are:

Cache markers for missing document lookups.
Marker invalidation after single and batch creation.
Protection for locking reads and permission-filtered results.
Projection-aware cache entries and tenant-aware purging.
Adapter capability reporting and expanded end-to-end tests.

Confidence Score: 5/5

This looks safe to merge.

No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
src/Database/Database.php	Adds negative-cache reads, writes, and tenant-aware invalidation after document creation.
src/Database/Adapter.php	Adds the adapter cache-capability contract.
src/Database/Adapter/Memory.php	Reports support for the Database cache layer.
src/Database/Adapter/Mongo.php	Reports support for the Database cache layer.
src/Database/Adapter/Pool.php	Delegates cache-capability reporting to the pooled adapter.
src/Database/Adapter/Redis.php	Reports that Redis bypasses the separate Database cache layer.
src/Database/Adapter/SQL.php	Reports cache support for SQL-based adapters.
tests/e2e/Adapter/Scopes/DocumentTests.php	Covers missing-result caching, invalidation, projections, locking reads, collections, and document security.
composer.lock	Refreshes locked dependency versions.

_{Reviews (3): Last reviewed commit: "withDocumentTenant" | Re-trigger Greptile}

coderabbitai

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/Database/Database.php`:
- Around line 8460-8483: Update purgeCreatedDocumentCache() to wrap both the
tenant-scoped withTenant() path and direct purgeCachedDocumentInternal() call in
exception handling, logging cache purge failures with Console::warning while
allowing the committed createDocument/createDocuments operation to succeed. Keep
the existing tenant resolution and purge behavior unchanged; do not refactor the
duplicated tenant wrapper.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

Push a commit to this branch (recommended)
Create a new PR with the fixes

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📥 Commits

Reviewing files that changed from the base of the PR and between a1796fd and 538e228.

⛔ Files ignored due to path filters (1)

composer.lock is excluded by !**/*.lock

📒 Files selected for processing (2)

src/Database/Database.php
tests/e2e/Adapter/Scopes/DocumentTests.php

coderabbitai

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/Database/Adapter.php`:
- Around line 1125-1132: Make getSupportForCaching() in Adapter non-abstract and
provide the default caching behavior, then explicitly override it in built-in
adapters where their cache support differs. Preserve existing downstream adapter
instantiation without requiring new method implementations.

🪄 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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Run ID: 188d43d8-2323-4f76-a6a7-13476a829e47

📥 Commits

Reviewing files that changed from the base of the PR and between 538e228 and 0085de2.

📒 Files selected for processing (7)

src/Database/Adapter.php
src/Database/Adapter/Memory.php
src/Database/Adapter/Mongo.php
src/Database/Adapter/Pool.php
src/Database/Adapter/Redis.php
src/Database/Adapter/SQL.php
tests/e2e/Adapter/Scopes/DocumentTests.php

🚧 Files skipped from review as they are similar to previous changes (1)

tests/e2e/Adapter/Scopes/DocumentTests.php

run tests

538e228

coderabbitai Bot reviewed Jul 22, 2026

View reviewed changes

Comment thread src/Database/Database.php

get support for caching in adapter methods

0085de2

coderabbitai Bot reviewed Jul 23, 2026

View reviewed changes

Comment thread src/Database/Adapter.php

withDocumentTenant

b1203dd

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Cache empty getDocument results#924

Cache empty getDocument results#924
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fogelito commented Jul 22, 2026 •

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Confidence Score: 5/5

Important Files Changed

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fogelito commented Jul 22, 2026 •

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