mirror of
https://github.com/Dvorinka/MyClubServer.git
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Tomas Dvorak
93 lines
3.2 KiB
Markdown
93 lines
3.2 KiB
Markdown
# Blog Match Link Fix - October 2025
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## Problem
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React Error #310 (Maximum update depth exceeded) - infinite render loop caused by backend returning `map[string]interface{}` instead of Article structs. Each map created new object references, triggering infinite re-renders in React useEffect hooks.
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## Root Cause
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Previous attempt to add match link data to article JSON responses used helper functions that returned maps instead of structs. This broke React's referential equality checks.
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## Solution
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### 1. Added MatchLink Field to Article Model
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**File**: `internal/models/models.go`
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```go
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type Article struct {
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// ... existing fields ...
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// Match link (loaded separately, not stored in this table)
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MatchLink *ArticleMatchLink `gorm:"-" json:"match_link,omitempty"`
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}
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```
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The `gorm:"-"` tag prevents GORM from treating it as a database column, and `omitempty` keeps it out of JSON if nil.
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### 2. Updated Backend Controllers
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**File**: `internal/controllers/base_controller.go`
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#### GetArticle (single article by ID)
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- Loads match link after fetching article
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- Sets `art.MatchLink` if found
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#### GetArticles (paginated list)
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- Batch loads all match links for returned articles in single query
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- Maps match links to articles by ID for O(1) lookup
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- Efficient: one extra query regardless of result set size
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#### GetArticleBySlug (single article by slug)
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- Same as GetArticle - loads match link if exists
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### 3. Simplified Frontend
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**File**: `frontend/src/pages/admin/ArticlesAdminPage.tsx`
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- **Removed**: Redundant useEffect that fetched match link separately
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- **Kept**: openEdit() function that extracts match_link from article data
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- **Result**: Fewer API calls, no infinite loops
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## Benefits
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1. **No Infinite Loops**: Article structs maintain referential equality
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2. **Complete Data**: Article JSON now includes both competition AND match data
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3. **Better Performance**: Batch loading for lists (N+1 → 2 queries)
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4. **Backward Compatible**: Match link is optional (`omitempty`)
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5. **Cleaner Code**: No complex map transformations
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## Album Link Reuse
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The album link reuse feature was **already implemented** (lines 400-415 in ArticlesAdminPage.tsx). When photos are selected in the Obsah tab, both the album link AND photos are automatically populated in the Media tab.
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**Enhancement made**: Improved UI feedback with green background and clear status messages when album is loaded.
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## Article JSON Structure
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Articles now include:
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```json
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{
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"id": 123,
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"title": "Match Report",
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"category_name": "A třída",
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"gallery_album_url": "https://eu.zonerama.com/...",
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"youtube_video_id": "abc123",
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"match_link": {
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"external_match_id": "match-abc-123",
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"title": "Home Team vs Away Team"
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}
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}
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```
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## Testing
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Test that:
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1. ✅ No React infinite loop errors
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2. ✅ Match link appears in article JSON responses
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3. ✅ Match link displays correctly in admin UI
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4. ✅ Album link persists between Obsah and Media tabs
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5. ✅ All article endpoints work (GetArticle, GetArticles, GetArticleBySlug)
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## Files Modified
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- `internal/models/models.go` - Added MatchLink field
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- `internal/controllers/base_controller.go` - Load match links in 3 endpoints
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- `frontend/src/pages/admin/ArticlesAdminPage.tsx` - Removed redundant fetch, improved UI
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