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perf(feed): Batch load media and tags to fix N+1 query

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Per v1.5.0 Phase 3: Fix N+1 query pattern in feed generation.

Implementation:
- Add get_media_for_notes() to starpunk/media.py for batch media loading
- Add get_tags_for_notes() to starpunk/tags.py for batch tag loading
- Update _get_cached_notes() in starpunk/routes/public.py to use batch loading
- Add comprehensive tests in tests/test_batch_loading.py

Performance improvement:
- Before: O(n) queries (1 query per note for media + 1 query per note for tags)
- After: O(1) queries (2 queries total: 1 for all media, 1 for all tags)
- Maintains same API behavior and output format

All tests passing: 920 passed in 360.79s

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Phil Skentelbery
2025-12-17 10:42:44 -07:00
parent 1b45a64920
commit b689e02e64
5 changed files with 760 additions and 6 deletions
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242
docs/design/v1.5.0/2025-12-16-phase2-architect-review.md Normal file
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@@ -0,0 +1,242 @@
# Phase 2 Architect Review: Debug File Management
**Date**: 2025-12-17
**Reviewer**: Architect Agent
**Phase**: 2 - Debug File Management
**Status**: APPROVED
---
## Executive Summary
Phase 2 implementation meets all acceptance criteria and demonstrates sound architectural decisions. The implementation follows the principle of secure defaults, properly sanitizes user-controlled input, and provides appropriate cleanup mechanisms to prevent resource exhaustion.
---
## Acceptance Criteria Verification
| Criterion | Status | Notes |
|-----------|--------|-------|
| Debug files disabled by default | PASS | `DEBUG_SAVE_FAILED_UPLOADS` defaults to `False` |
| Files older than 7 days auto-deleted | PASS | Configurable via `DEBUG_FILE_MAX_AGE_DAYS` |
| Folder size limited to 100MB | PASS | Configurable via `DEBUG_FILE_MAX_SIZE_MB` |
| Filenames sanitized (no path traversal) | PASS | Pattern: alphanumeric, `.`, `_`, `-` only, truncated to 50 chars |
| Cleanup runs on startup | PASS | Called in `create_app()` before database init |
| Tests cover all scenarios | PASS | 15 tests covering config, saving, sanitization, cleanup, startup |
---
## Code Review
### 1. Configuration (`starpunk/config.py`)
**Lines 100-103:**
```python
app.config["DEBUG_SAVE_FAILED_UPLOADS"] = os.getenv("DEBUG_SAVE_FAILED_UPLOADS", "false").lower() == "true"
app.config["DEBUG_FILE_MAX_AGE_DAYS"] = int(os.getenv("DEBUG_FILE_MAX_AGE_DAYS", "7"))
app.config["DEBUG_FILE_MAX_SIZE_MB"] = int(os.getenv("DEBUG_FILE_MAX_SIZE_MB", "100"))
```
**Assessment**: Correct implementation.
- Boolean parsing uses explicit comparison to "true" (secure)
- Integer parsing uses sensible defaults
- Configuration follows existing patterns in the file
### 2. Filename Sanitization (`starpunk/media.py`)
**Lines 141-143:**
```python
# Sanitize filename to prevent path traversal (v1.5.0 security fix)
safe_filename = "".join(c for c in filename if c.isalnum() or c in "._-")[:50]
debug_file = debug_dir / f"failed_{datetime.now().strftime('%Y%m%d_%H%M%S')}_{safe_filename}"
```
**Assessment**: Correct implementation of specified pattern.
- Allowlist approach (only alphanumeric, `.`, `_`, `-`)
- Truncation to 50 characters prevents filesystem issues
- Path traversal attack vectors (`../`, `..\\`, etc.) are neutralized
**Security Note**: The pattern `"._-"` correctly allows:
- `.` for file extensions
- `_` for separators
- `-` for common filename characters
The pattern removes:
- `/` and `\` (path separators)
- `:` (Windows drive letters)
- `<>"|?*` (shell metacharacters)
- Null bytes and other control characters
### 3. Cleanup Function (`starpunk/media.py`)
**Lines 785-857:**
**Assessment**: Well-designed two-phase cleanup algorithm.
**Phase 1 - Age-based cleanup:**
- Correctly calculates cutoff date
- Uses `timedelta` for date arithmetic
- Removes from list while iterating (uses slice copy correctly)
**Phase 2 - Size-based cleanup:**
- Correctly sums remaining file sizes
- Deletes oldest first (proper FIFO approach)
- Loop terminates when under limit or no files remain
**Edge cases handled:**
- Non-existent directory (early return)
- Empty directory (early return after glob)
- OSError during deletion (logged, continues)
### 4. Startup Integration (`starpunk/__init__.py`)
**Lines 130-132:**
```python
# Clean up old debug files (v1.5.0 Phase 2)
from starpunk.media import cleanup_old_debug_files
cleanup_old_debug_files(app)
```
**Assessment**: Correct placement.
- After logging configuration (can log cleanup actions)
- Before database initialization (no DB dependency)
- Uses app instance directly (not current_app, which wouldn't exist yet)
### 5. Test Coverage
**15 tests in 5 test classes:**
| Class | Tests | Purpose |
|-------|-------|---------|
| `TestDebugFileConfiguration` | 4 | Verify config defaults and override |
| `TestDebugFileSaving` | 2 | Verify conditional saving behavior |
| `TestDebugFilenameSanitization` | 3 | Security: path traversal, special chars, truncation |
| `TestDebugFileCleanup` | 5 | Age/size limits, edge cases |
| `TestDebugFileStartupCleanup` | 1 | Integration: cleanup during app init |
**Assessment**: Comprehensive coverage of all requirements.
---
## Security Analysis
### Path Traversal Prevention
The sanitization pattern effectively prevents all known path traversal attacks:
| Attack Vector | Input | Sanitized Output |
|---------------|-------|------------------|
| Basic traversal | `../../../etc/passwd` | `...etcpasswd` |
| Windows traversal | `..\\..\\..\system32` | `...system32` |
| Encoded traversal | `%2e%2e%2f` | `2e2e2f` (%-encoded already decoded before reaching code) |
| Null byte | `file\x00.jpg` | `file.jpg` |
### Default-Secure Configuration
The feature is disabled by default (`DEBUG_SAVE_FAILED_UPLOADS=false`), meaning:
- Production deployments are protected without configuration
- Debug files only appear when explicitly enabled
- No accidental data retention in production
### Resource Exhaustion Prevention
Dual limits prevent disk exhaustion:
- Age limit (7 days default): Prevents indefinite accumulation
- Size limit (100MB default): Hard cap on disk usage
- Both limits configurable for different environments
---
## Performance Considerations
### Startup Overhead
The `cleanup_old_debug_files()` function runs on every app startup:
```python
# Worst case: 1000 files in debug directory
# - glob: O(n) directory listing
# - sort: O(n log n)
# - deletion: O(n) unlink calls
# Estimated overhead: ~100ms for 100 files, ~500ms for 1000 files
```
**Assessment**: Acceptable. Startup is not a hot path, and the cleanup prevents greater issues.
**Recommendation**: Consider adding early exit if `DEBUG_SAVE_FAILED_UPLOADS=False` to skip cleanup entirely in production. However, this is a minor optimization and not required for approval.
---
## Architectural Alignment
### Project Philosophy
> "Every line of code must justify its existence."
This implementation follows the philosophy:
- Minimal code (single sanitization pattern)
- Single responsibility (cleanup function does one thing)
- Secure defaults (disabled in production)
- No unnecessary features
### Standards Compliance
The implementation follows established patterns:
- Configuration uses existing `os.getenv()` pattern
- Logging uses `app.logger`
- File operations use `pathlib.Path`
- Tests use pytest fixtures
---
## Minor Observations (Not Blocking)
1. **Config validation**: The new config options are not validated in `validate_config()`. Since they have sensible defaults and are non-critical, this is acceptable. However, negative values for MAX_AGE_DAYS or MAX_SIZE_MB could cause unexpected behavior.
2. **Logging verbosity**: When cleanup deletes many files, it logs a single summary message. This is appropriate for production but could mask issues during debugging.
3. **Race condition**: If multiple workers start simultaneously, they could attempt to delete the same file. The OSError handling covers this gracefully.
---
## Verdict
### APPROVED
Phase 2 is complete and meets all acceptance criteria. The implementation demonstrates:
- Secure defaults
- Proper input sanitization
- Comprehensive test coverage
- Good error handling
- Alignment with project architecture
**The developer may proceed to Phase 3: N+1 Query Fix (Feed Generation).**
---
## Checklist for Project Plan Update
The following items from RELEASE.md Phase 2 are complete:
- [x] Configuration options added (DEBUG_SAVE_FAILED_UPLOADS, DEBUG_FILE_MAX_AGE_DAYS, DEBUG_FILE_MAX_SIZE_MB)
- [x] Cleanup logic implemented in starpunk/media.py
- [x] Config check before saving debug files
- [x] `cleanup_old_debug_files()` function implemented
- [x] Startup cleanup integrated in `__init__.py`
- [x] Filename sanitization pattern implemented
- [x] Tests cover all scenarios (15 tests)
---
## Appendix: Test Verification
```
$ uv run pytest tests/test_debug_file_management.py -v
================================ 15 passed in 0.72s ============================
$ uv run pytest tests/test_media*.py -v
================================ 33 passed in 6.16s ============================
```
All tests pass consistently.

127
starpunk/media.py
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@@ -725,6 +725,133 @@ def get_note_media(note_id: int) -> List[Dict]:
return media_list
def get_media_for_notes(note_ids: List[int]) -> Dict[int, List[Dict]]:
"""
Batch load media for multiple notes in single query
Per v1.5.0 Phase 3: Fixes N+1 query pattern in feed generation.
Loads media and variants for all notes in 2 queries instead of O(n).
Args:
note_ids: List of note IDs to load media for
Returns:
Dict mapping note_id to list of media dicts (same format as get_note_media)
Examples:
>>> result = get_media_for_notes([1, 2, 3])
>>> result[1] # Media for note 1
[{'id': 10, 'filename': 'test.jpg', ...}]
>>> result[2] # Media for note 2
[] # No media
"""
from starpunk.database import get_db
if not note_ids:
return {}
db = get_db(current_app)
# Build placeholders for IN clause
placeholders = ','.join('?' * len(note_ids))
# Query 1: Get all media for all notes
media_rows = db.execute(
f"""
SELECT
nm.note_id,
m.id,
m.filename,
m.stored_filename,
m.path,
m.mime_type,
m.size,
m.width,
m.height,
nm.caption,
nm.display_order
FROM note_media nm
JOIN media m ON nm.media_id = m.id
WHERE nm.note_id IN ({placeholders})
ORDER BY nm.note_id, nm.display_order
""",
note_ids
).fetchall()
# Extract all media IDs for variant query
media_ids = [row[1] for row in media_rows]
# Query 2: Get all variants for all media (if any media exists)
variants_by_media = {}
if media_ids:
variant_placeholders = ','.join('?' * len(media_ids))
variant_rows = db.execute(
f"""
SELECT media_id, variant_type, path, width, height, size_bytes
FROM media_variants
WHERE media_id IN ({variant_placeholders})
ORDER BY media_id,
CASE variant_type
WHEN 'thumb' THEN 1
WHEN 'small' THEN 2
WHEN 'medium' THEN 3
WHEN 'large' THEN 4
WHEN 'original' THEN 5
END
""",
media_ids
).fetchall()
# Group variants by media_id
for row in variant_rows:
media_id = row[0]
if media_id not in variants_by_media:
variants_by_media[media_id] = []
variants_by_media[media_id].append({
'variant_type': row[1],
'path': row[2],
'width': row[3],
'height': row[4],
'size_bytes': row[5]
})
# Build result dict grouped by note_id
result = {note_id: [] for note_id in note_ids}
for row in media_rows:
note_id = row[0]
media_id = row[1]
media_dict = {
'id': media_id,
'filename': row[2],
'stored_filename': row[3],
'path': row[4],
'mime_type': row[5],
'size': row[6],
'width': row[7],
'height': row[8],
'caption': row[9],
'display_order': row[10]
}
# Add variants if they exist for this media
if media_id in variants_by_media:
media_dict['variants'] = {
v['variant_type']: {
'path': v['path'],
'width': v['width'],
'height': v['height'],
'size_bytes': v['size_bytes']
}
for v in variants_by_media[media_id]
}
result[note_id].append(media_dict)
return result
def delete_media(media_id: int) -> None:
"""
Delete media file, variants, and database record

19
starpunk/routes/public.py
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@@ -42,11 +42,13 @@ def _get_cached_notes():
Returns cached notes if still valid, otherwise fetches fresh notes
from database and updates cache. Includes media and tags for each note.
Per v1.5.0 Phase 3: Uses batch loading to avoid N+1 query pattern.
Returns:
List of published notes for feed generation (with media and tags attached)
"""
from starpunk.media import get_note_media
from starpunk.tags import get_note_tags
from starpunk.media import get_media_for_notes
from starpunk.tags import get_tags_for_notes
# Get cache duration from config (in seconds)
cache_seconds = current_app.config.get("FEED_CACHE_SECONDS", 300)
@@ -64,13 +66,18 @@ def _get_cached_notes():
max_items = current_app.config.get("FEED_MAX_ITEMS", 50)
notes = list_notes(published_only=True, limit=max_items)
# Attach media to each note (v1.2.0 Phase 3)
# Batch load media and tags for all notes (v1.5.0 Phase 3)
# Reduces query count from O(n) to O(1) for both media and tags
note_ids = [note.id for note in notes]
media_by_note = get_media_for_notes(note_ids)
tags_by_note = get_tags_for_notes(note_ids)
# Attach media and tags to each note
for note in notes:
media = get_note_media(note.id)
media = media_by_note.get(note.id, [])
object.__setattr__(note, 'media', media)
# Attach tags to each note (v1.3.1)
tags = get_note_tags(note.id)
tags = tags_by_note.get(note.id, [])
object.__setattr__(note, '_cached_tags', tags)
_feed_cache["notes"] = notes

54
starpunk/tags.py
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@@ -143,6 +143,60 @@ def get_note_tags(note_id: int) -> list[dict]:
return [dict(tag) for tag in tags]
def get_tags_for_notes(note_ids: list[int]) -> dict[int, list[dict]]:
"""
Batch load tags for multiple notes in single query
Per v1.5.0 Phase 3: Fixes N+1 query pattern in feed generation.
Loads tags for all notes in 1 query instead of O(n).
Args:
note_ids: List of note IDs to load tags for
Returns:
Dict mapping note_id to list of tag dicts (same format as get_note_tags)
Notes without tags will have empty list
Examples:
>>> result = get_tags_for_notes([1, 2, 3])
>>> result[1] # Tags for note 1
[{'name': 'python', 'display_name': 'Python'}]
>>> result[2] # Tags for note 2
[] # No tags
"""
db = get_db(current_app)
if not note_ids:
return {}
# Build placeholders for IN clause
placeholders = ','.join('?' * len(note_ids))
# Single query to get all tags for all notes
rows = db.execute(
f"""
SELECT note_tags.note_id, tags.name, tags.display_name
FROM tags
JOIN note_tags ON tags.id = note_tags.tag_id
WHERE note_tags.note_id IN ({placeholders})
ORDER BY note_tags.note_id, LOWER(tags.display_name) ASC
""",
note_ids
).fetchall()
# Build result dict grouped by note_id
result = {note_id: [] for note_id in note_ids}
for row in rows:
note_id = row[0]
result[note_id].append({
'name': row[1],
'display_name': row[2]
})
return result
def get_tag_by_name(name: str) -> Optional[dict]:
"""
Get tag by normalized name

324
tests/test_batch_loading.py Normal file
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@@ -0,0 +1,324 @@
"""
Tests for batch loading functions (v1.5.0 Phase 3)
Tests batch loading of media and tags to verify N+1 query fix in feed generation.
"""
import pytest
from PIL import Image
import io
from starpunk.media import get_media_for_notes, save_media, attach_media_to_note
from starpunk.tags import get_tags_for_notes, add_tags_to_note
from starpunk.notes import create_note
def create_test_image(width=800, height=600, format='JPEG'):
"""
Generate test image using PIL
Args:
width: Image width in pixels
height: Image height in pixels
format: Image format (PNG, JPEG, GIF, WEBP)
Returns:
Bytes of image data
"""
img = Image.new('RGB', (width, height), color='red')
buffer = io.BytesIO()
img.save(buffer, format=format)
buffer.seek(0)
return buffer.getvalue()
class TestBatchMediaLoading:
"""Test get_media_for_notes batch loading function"""
def test_batch_load_media_empty_list(self, app):
"""Test batch loading with empty note list"""
with app.app_context():
result = get_media_for_notes([])
assert result == {}
def test_batch_load_media_no_media(self, app):
"""Test batch loading for notes without media"""
with app.app_context():
# Create notes without media
note1 = create_note(content="Test note 1", published=True)
note2 = create_note(content="Test note 2", published=True)
result = get_media_for_notes([note1.id, note2.id])
assert len(result) == 2
assert result[note1.id] == []
assert result[note2.id] == []
def test_batch_load_media_with_media(self, app):
"""Test batch loading for notes with media"""
with app.app_context():
# Create test notes
note1 = create_note(content="Test note 1", published=True)
note2 = create_note(content="Test note 2", published=True)
# Upload media for note1
image_data = create_test_image(800, 600, 'JPEG')
media1 = save_media(image_data, 'test1.jpg')
attach_media_to_note(note1.id, [media1['id']], ['Caption 1'])
# Upload media for note2
image_data2 = create_test_image(640, 480, 'PNG')
media2 = save_media(image_data2, 'test2.png')
attach_media_to_note(note2.id, [media2['id']], ['Caption 2'])
# Batch load media
result = get_media_for_notes([note1.id, note2.id])
# Verify results
assert len(result) == 2
assert len(result[note1.id]) == 1
assert len(result[note2.id]) == 1
# Verify media1
assert result[note1.id][0]['id'] == media1['id']
assert result[note1.id][0]['filename'] == 'test1.jpg'
assert result[note1.id][0]['caption'] == 'Caption 1'
assert result[note1.id][0]['mime_type'] == 'image/jpeg'
# Verify media2
assert result[note2.id][0]['id'] == media2['id']
assert result[note2.id][0]['filename'] == 'test2.png'
assert result[note2.id][0]['caption'] == 'Caption 2'
assert result[note2.id][0]['mime_type'] == 'image/png'
def test_batch_load_media_with_variants(self, app):
"""Test batch loading includes variants (v1.4.0+)"""
with app.app_context():
# Create note with media
note = create_note(content="Test note with variants", published=True)
# Upload large image (will generate variants)
image_data = create_test_image(2000, 1500, 'JPEG')
media = save_media(image_data, 'large.jpg')
attach_media_to_note(note.id, [media['id']], ['Large image'])
# Batch load media
result = get_media_for_notes([note.id])
# Verify variants are included
assert len(result[note.id]) == 1
media_dict = result[note.id][0]
assert 'variants' in media_dict
# Should have thumb, small, medium, large, original variants
assert 'thumb' in media_dict['variants']
assert 'original' in media_dict['variants']
def test_batch_load_media_multiple_per_note(self, app):
"""Test batch loading with multiple media per note"""
with app.app_context():
# Create note with multiple media
note = create_note(content="Test note with multiple media", published=True)
# Upload multiple images
media_ids = []
captions = []
for i in range(3):
image_data = create_test_image(800, 600, 'JPEG')
media = save_media(image_data, f'test{i}.jpg')
media_ids.append(media['id'])
captions.append(f'Caption {i}')
attach_media_to_note(note.id, media_ids, captions)
# Batch load media
result = get_media_for_notes([note.id])
# Verify all media loaded
assert len(result[note.id]) == 3
# Verify display order preserved
for i, media_dict in enumerate(result[note.id]):
assert media_dict['caption'] == f'Caption {i}'
assert media_dict['display_order'] == i
def test_batch_load_media_mixed_notes(self, app):
"""Test batch loading with mix of notes with/without media"""
with app.app_context():
# Create notes
note1 = create_note(content="Note with media", published=True)
note2 = create_note(content="Note without media", published=True)
note3 = create_note(content="Another note with media", published=True)
# Add media to note1 and note3
image_data = create_test_image(800, 600, 'JPEG')
media1 = save_media(image_data, 'test1.jpg')
attach_media_to_note(note1.id, [media1['id']], ['Caption 1'])
image_data3 = create_test_image(800, 600, 'JPEG')
media3 = save_media(image_data3, 'test3.jpg')
attach_media_to_note(note3.id, [media3['id']], ['Caption 3'])
# Batch load
result = get_media_for_notes([note1.id, note2.id, note3.id])
# Verify results
assert len(result) == 3
assert len(result[note1.id]) == 1
assert len(result[note2.id]) == 0 # No media
assert len(result[note3.id]) == 1
class TestBatchTagLoading:
"""Test get_tags_for_notes batch loading function"""
def test_batch_load_tags_empty_list(self, app):
"""Test batch loading with empty note list"""
with app.app_context():
result = get_tags_for_notes([])
assert result == {}
def test_batch_load_tags_no_tags(self, app):
"""Test batch loading for notes without tags"""
with app.app_context():
# Create notes without tags
note1 = create_note(content="Test note 1", published=True)
note2 = create_note(content="Test note 2", published=True)
result = get_tags_for_notes([note1.id, note2.id])
assert len(result) == 2
assert result[note1.id] == []
assert result[note2.id] == []
def test_batch_load_tags_with_tags(self, app):
"""Test batch loading for notes with tags"""
with app.app_context():
# Create test notes
note1 = create_note(content="Test note 1", published=True)
note2 = create_note(content="Test note 2", published=True)
# Add tags to notes
add_tags_to_note(note1.id, ['Python', 'Testing'])
add_tags_to_note(note2.id, ['IndieWeb', 'Web'])
# Batch load tags
result = get_tags_for_notes([note1.id, note2.id])
# Verify results
assert len(result) == 2
assert len(result[note1.id]) == 2
assert len(result[note2.id]) == 2
# Verify note1 tags (alphabetical by display_name)
assert result[note1.id][0]['display_name'] == 'Python'
assert result[note1.id][0]['name'] == 'python'
assert result[note1.id][1]['display_name'] == 'Testing'
assert result[note1.id][1]['name'] == 'testing'
# Verify note2 tags
assert result[note2.id][0]['display_name'] == 'IndieWeb'
assert result[note2.id][0]['name'] == 'indieweb'
assert result[note2.id][1]['display_name'] == 'Web'
assert result[note2.id][1]['name'] == 'web'
def test_batch_load_tags_mixed_notes(self, app):
"""Test batch loading with mix of notes with/without tags"""
with app.app_context():
# Create notes
note1 = create_note(content="Note with tags", published=True)
note2 = create_note(content="Note without tags", published=True)
note3 = create_note(content="Another note with tags", published=True)
# Add tags to note1 and note3
add_tags_to_note(note1.id, ['Tag1', 'Tag2'])
add_tags_to_note(note3.id, ['Tag3'])
# Batch load
result = get_tags_for_notes([note1.id, note2.id, note3.id])
# Verify results
assert len(result) == 3
assert len(result[note1.id]) == 2
assert len(result[note2.id]) == 0 # No tags
assert len(result[note3.id]) == 1
def test_batch_load_tags_ordering(self, app):
"""Test batch loading preserves alphabetical ordering"""
with app.app_context():
# Create note with tags in non-alphabetical order
note = create_note(content="Test note", published=True)
add_tags_to_note(note.id, ['Zebra', 'Apple', 'Banana'])
# Batch load
result = get_tags_for_notes([note.id])
# Verify alphabetical order (case-insensitive)
assert len(result[note.id]) == 3
assert result[note.id][0]['display_name'] == 'Apple'
assert result[note.id][1]['display_name'] == 'Banana'
assert result[note.id][2]['display_name'] == 'Zebra'
class TestBatchLoadingIntegration:
"""Test batch loading integration with feed generation"""
def test_feed_generation_uses_batch_loading(self, client, app):
"""Test that feed generation correctly uses batch loaded data"""
with app.app_context():
# Create multiple notes with media and tags
notes = []
for i in range(5):
note = create_note(content=f"Test note {i}", published=True)
notes.append(note)
# Add media
image_data = create_test_image(800, 600, 'JPEG')
media = save_media(image_data, f'test{i}.jpg')
attach_media_to_note(note.id, [media['id']], [f'Caption {i}'])
# Add tags
add_tags_to_note(note.id, [f'Tag{i}', 'Common'])
# Request feed (should use batch loading)
response = client.get('/feed.rss')
assert response.status_code == 200
# Verify feed contains data from batch loaded media/tags
feed_data = response.data.decode('utf-8')
assert 'Test note 0' in feed_data
assert 'Test note 4' in feed_data
# Media should be in feed
assert 'test0.jpg' in feed_data or 'media/' in feed_data
def test_batch_loading_performance_comparison(self, app):
"""Test that batch loading reduces query count"""
with app.app_context():
from starpunk.database import get_db
# Create test data
notes = []
for i in range(10):
note = create_note(content=f"Test note {i}", published=True)
notes.append(note)
# Add media
image_data = create_test_image(800, 600, 'JPEG')
media = save_media(image_data, f'test{i}.jpg')
attach_media_to_note(note.id, [media['id']], [f'Caption {i}'])
# Add tags
add_tags_to_note(note.id, [f'Tag{i}'])
note_ids = [n.id for n in notes]
# Batch load (should be 2 queries: media + variants, tags)
media_result = get_media_for_notes(note_ids)
tags_result = get_tags_for_notes(note_ids)
# Verify results complete
assert len(media_result) == 10
assert len(tags_result) == 10
# Verify all notes have data
for note_id in note_ids:
assert len(media_result[note_id]) == 1
assert len(tags_result[note_id]) == 1