diff --git a/src/main/java/com/lk/paopao/mapper/PostMapper.java b/src/main/java/com/lk/paopao/mapper/PostMapper.java
index ba3b29b..6146526 100644
--- a/src/main/java/com/lk/paopao/mapper/PostMapper.java
+++ b/src/main/java/com/lk/paopao/mapper/PostMapper.java
@@ -1,7 +1,9 @@
 package com.lk.paopao.mapper;
 
+import com.lk.paopao.dto.PostContentDto;
 import com.lk.paopao.entity.Post;
 import com.lk.paopao.dto.PostDto;
+import com.lk.paopao.entity.PostContent;
 import org.mapstruct.*;
 
 @Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, componentModel = MappingConstants.ComponentModel.SPRING)
@@ -13,4 +15,7 @@ public interface PostMapper {
 
     @BeanMapping(nullValuePropertyMappingStrategy = NullValuePropertyMappingStrategy.IGNORE)
     Post partialUpdate(PostDto postDto, @MappingTarget Post post);
+
+    @Mapping(source = "post.id", target = "postId")
+    PostContentDto toContentDto(PostContent postContent);
 }
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