BUGFIX:1. 排序优化，添加唯一约束和重试

2.like前先查询是否有被like

src/main/java/com/ai/da/mapper/primary/CollectionSortMapper.java

@@ -22,4 +22,22 @@ public interface CollectionSortMapper extends CommonMapper<CollectionSort> {
     @Select("SELECT * FROM collection_sort WHERE parent_id IN (SELECT id FROM collection_sort WHERE relation_id = #{relationId})")
     List<CollectionSort> queryCollectionSortsIsNotDesignByUserLikeRelationId(@Param("relationId") Long relationId);
 
+    @Update({
+            "<script>",
+            "UPDATE collection_sort",
+            "SET sort = sort - 1",
+            "WHERE project_id = #{projectId}",
+            "AND sort > #{deletedSort}",
+            "<if test='parentId != null'>",
+            "AND parent_id = #{parentId}",
+            "</if>",
+            "<if test='parentId == null'>",
+            "AND parent_id IS NULL",
+            "</if>",
+            "</script>"
+    })
+    void decrementSortAfterDelete(@Param("projectId") Long projectId,
+                                  @Param("parentId") Long parentId,
+                                  @Param("deletedSort") int deletedSort);
+
 }