fix(media): 重转码物理清理旧产物避免唯一键冲突

fruitshorts-module-media/src/main/java/com/fruitshorts/media/dal/mapper/MediaRenditionMapper.java

@@ -4,6 +4,17 @@ package com.fruitshorts.media.dal.mapper;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.fruitshorts.media.dal.entity.MediaRendition;
+import org.apache.ibatis.annotations.Delete;
+import org.apache.ibatis.annotations.Param;
 
 public interface MediaRenditionMapper extends BaseMapper<MediaRendition> {
+
+    /**
+     * 物理删除旧产物。唯一索引 uk_rendition(media_asset_id, quality, format) 不含 deleted，
+     * 逻辑删除的旧行会继续占着唯一键，重转时插入必然冲突，所以这里必须绕过 @TableLogic 真删。
+     */
+    @Delete("<script>DELETE FROM media_rendition WHERE media_asset_id = #{mediaAssetId}"
+            + "<if test='episodeId != null and episodeId > 0'> OR episode_id = #{episodeId}</if>"
+            + "</script>")
+    int deletePhysically(@Param("mediaAssetId") Long mediaAssetId, @Param("episodeId") Long episodeId);
 }

fruitshorts-module-media/src/main/java/com/fruitshorts/media/service/TranscodeService.java

@@ -217,15 +217,8 @@ public class TranscodeService {
     public void succeed(Long taskId, List<MediaRendition> renditions,
                         MediaThumbnail thumbnail) {
         TranscodeTask task = getExisting(taskId);
-        var renditionDelete = Wrappers.<MediaRendition>lambdaQuery();
-        if (task.getEpisodeId() != null && task.getEpisodeId() > 0) {
-            renditionDelete.and(wrapper -> wrapper
-                    .eq(MediaRendition::getMediaAssetId, task.getMediaAssetId())
-                    .or().eq(MediaRendition::getEpisodeId, task.getEpisodeId()));
-        } else {
-            renditionDelete.eq(MediaRendition::getMediaAssetId, task.getMediaAssetId());
-        }
-        mediaRenditionMapper.delete(renditionDelete);
+        // 唯一索引不含 deleted，旧产物必须物理删除，否则重转时插入会撞 uk_rendition
+        mediaRenditionMapper.deletePhysically(task.getMediaAssetId(), task.getEpisodeId());
         for (MediaRendition rendition : renditions) {
             rendition.setMediaAssetId(task.getMediaAssetId());
             rendition.setDramaId(task.getDramaId());