hot fix #1

internal/controllers/comment_controller.go

@@ -170,20 +170,28 @@ func (cc *CommentController) React(c *gin.Context) {
 	case uint:
 		userID = v
 	case int:
-		if v > 0 { userID = uint(v) }
+		if v > 0 {
+			userID = uint(v)
+		}
 	case int64:
-		if v > 0 { userID = uint(v) }
+		if v > 0 {
+			userID = uint(v)
+		}
 	case float64:
-		if v > 0 { userID = uint(v) }
+		if v > 0 {
+			userID = uint(v)
+		}
 	case string:
-		if n, err := strconv.Atoi(strings.TrimSpace(v)); err == nil && n > 0 { userID = uint(n) }
+		if n, err := strconv.Atoi(strings.TrimSpace(v)); err == nil && n > 0 {
+			userID = uint(n)
+		}
 	}
 	if userID == 0 {
 		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})
 		return
 	}
 
-	// Robust upsert without relying on a DB unique constraint: delete then insert in a transaction
+	// Robust upsert with proper constraint handling
 	if err := cc.DB.Transaction(func(tx *gorm.DB) error {
 		// Remove any previous reaction by this user on this comment
 		if err := tx.Where("comment_id = ? AND user_id = ?", cm.ID, userID).Delete(&models.CommentReaction{}).Error; err != nil {
@@ -192,6 +200,17 @@ func (cc *CommentController) React(c *gin.Context) {
 		// Insert the new reaction
 		r := models.CommentReaction{CommentID: cm.ID, UserID: userID, Type: rt}
 		if err := tx.Create(&r).Error; err != nil {
+			// Check for unique constraint violation (PostgreSQL error code 23505)
+			if strings.Contains(err.Error(), "duplicate key") || strings.Contains(err.Error(), "unique constraint") {
+				// If we get a duplicate key error, try to update the existing reaction
+				updateErr := tx.Model(&models.CommentReaction{}).
+					Where("comment_id = ? AND user_id = ?", cm.ID, userID).
+					Update("type", rt).Error
+				if updateErr != nil {
+					return updateErr
+				}
+				return nil
+			}
 			return err
 		}
 		return nil
@@ -221,13 +240,21 @@ func (cc *CommentController) Unreact(c *gin.Context) {
 	case uint:
 		userID = v
 	case int:
-		if v > 0 { userID = uint(v) }
+		if v > 0 {
+			userID = uint(v)
+		}
 	case int64:
-		if v > 0 { userID = uint(v) }
+		if v > 0 {
+			userID = uint(v)
+		}
 	case float64:
-		if v > 0 { userID = uint(v) }
+		if v > 0 {
+			userID = uint(v)
+		}
 	case string:
-		if n, err := strconv.Atoi(strings.TrimSpace(v)); err == nil && n > 0 { userID = uint(n) }
+		if n, err := strconv.Atoi(strings.TrimSpace(v)); err == nil && n > 0 {
+			userID = uint(n)
+		}
 	}
 	if userID == 0 {
 		c.JSON(http.StatusUnauthorized, gin.H{"error": "Unauthorized"})