Merge pull request #181 from woowacourse-teams/Feature/#179-대댓글_조회_AP…

…I_구현 feat : 부모 ID로 대댓글 조회하는 API 추가
woowacourse-teams · Aug 2, 2023 · 983494e · 983494e
2 parents 72ce26a + 113e601
commit 983494e
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Showing 9 changed files with 2,994 additions and 3,397 deletions.
diff --git a/backend/emm-sale/src/docs/asciidoc/index.adoc b/backend/emm-sale/src/docs/asciidoc/index.adoc
@@ -202,9 +202,6 @@ include::{snippets}/delete-event/http-request.adoc[]
 .HTTP response
 include::{snippets}/delete-event/http-response.adoc[]
 
-.HTTP response 설명
-include::{snippets}/delete-event/response-fields.adoc[]
-
 == Comment
 
 === `GET` : 댓글 모두 조회
@@ -221,6 +218,20 @@ include::{snippets}/get-comment/http-response.adoc[]
 .HTTP response 설명
 include::{snippets}/get-comment/response-fields.adoc[]
 
+=== `GET` : 대댓글 모두 조회
+
+.HTTP request 설명
+include::{snippets}/get-children-comment/path-parameters.adoc[]
+
+.HTTP request
+include::{snippets}/get-children-comment/http-request.adoc[]
+
+.HTTP response
+include::{snippets}/get-children-comment/http-response.adoc[]
+
+.HTTP response 설명
+include::{snippets}/get-children-comment/response-fields.adoc[]
+
 === `POST` : 댓글 및 대댓글 생성
 
 .HTTP request

diff --git a/backend/emm-sale/src/main/java/com/emmsale/comment/api/CommentApi.java b/backend/emm-sale/src/main/java/com/emmsale/comment/api/CommentApi.java
@@ -40,6 +40,13 @@ public List<CommentHierarchyResponse> findAll(@RequestParam final Long eventId)
     return commentQueryService.findAllCommentsByEventId(eventId);
   }
 
+  @GetMapping("/comments/{comment-id}/children")
+  public List<CommentResponse> findChildren(
+      @PathVariable("comment-id") final Long commentId
+  ) {
+    return commentQueryService.findChildrenComments(commentId);
+  }
+
   @DeleteMapping("/comments/{comment-id}")
   @ResponseStatus(HttpStatus.NO_CONTENT)
   public void delete(@PathVariable("comment-id") final Long commentId, final Member member) {

diff --git a/backend/emm-sale/src/main/java/com/emmsale/comment/application/CommentQueryService.java b/backend/emm-sale/src/main/java/com/emmsale/comment/application/CommentQueryService.java
@@ -1,9 +1,13 @@
 package com.emmsale.comment.application;
 
+import com.emmsale.base.BaseEntity;
 import com.emmsale.comment.application.dto.CommentHierarchyResponse;
+import com.emmsale.comment.application.dto.CommentResponse;
 import com.emmsale.comment.domain.Comment;
 import com.emmsale.comment.domain.CommentRepository;
+import java.util.Comparator;
 import java.util.List;
+import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -21,4 +25,14 @@ public List<CommentHierarchyResponse> findAllCommentsByEventId(final Long eventI
 
     return CommentHierarchyResponse.from(comments);
   }
+
+  public List<CommentResponse> findChildrenComments(final Long parentId) {
+
+    final List<Comment> childrenComments = commentRepository.findByParentId(parentId);
+
+    return childrenComments.stream()
+        .sorted(Comparator.comparing(BaseEntity::getCreatedAt))
+        .map(CommentResponse::from)
+        .collect(Collectors.toList());
+  }
 }
diff --git a/backend/emm-sale/src/main/java/com/emmsale/comment/domain/CommentRepository.java b/backend/emm-sale/src/main/java/com/emmsale/comment/domain/CommentRepository.java
@@ -9,4 +9,6 @@ public interface CommentRepository extends JpaRepository<Comment, Long> {
 
   @Query("select c From Comment c inner join Event e on c.event.id = e.id where e.id = :eventId")
   List<Comment> findByEventId(@Param("eventId") final Long eventId);
+
+  List<Comment> findByParentId(Long parentId);
 }
diff --git a/backend/emm-sale/src/main/resources/http/comment.http b/backend/emm-sale/src/main/resources/http/comment.http
@@ -27,6 +27,9 @@ Authorization: bearer eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxIiwiaWF0IjoxNjkwMTk2OTY5L
 GET http://localhost:8080/comments?eventId=1
 Content-Type: application/json
 
+### 부모 ID로 대댓글 조회하기
+GET http://localhost:8080/comments/1/children
+
 ### 댓글 삭제 /comments/{comment-id}
 
 DELETE http://localhost:8080/comments/2