优化

internal/data/position.go

@@ -29,8 +29,10 @@ type positionPO struct {
 func (positionPO) TableName() string { return "sys_positions" }
 
 type userPositionPO struct {
-	UserID     uint `gorm:"primaryKey;column:sys_user_id"`
-	PositionID uint `gorm:"primaryKey;column:sys_position_id"`
+	// GVA does not declare a key on this explicit join model.  Do not let a
+	// database uniqueness constraint change duplicate-assignment behavior.
+	UserID     uint `gorm:"column:sys_user_id"`
+	PositionID uint `gorm:"column:sys_position_id"`
 }
 
 func (userPositionPO) TableName() string { return "sys_user_positions" }
@@ -82,7 +84,10 @@ func (r *positionRepo) ListPositions(ctx context.Context, page, size int, q *biz
 		return nil, 0, err
 	}
 	var pos []positionPO
-	if err := applyPagination(db.Order("sort"), page, size, 0).Find(&pos).Error; err != nil {
+	// The compatible position endpoint applies the supplied LIMIT/OFFSET
+	// directly (it does not normalize missing page values through the shared
+	// pagination helper).
+	if err := db.Order("sort").Limit(size).Offset(size * (page - 1)).Find(&pos).Error; err != nil {
 		return nil, 0, err
 	}
 	out := make([]*biz.Position, 0, len(pos))