refactor(backend): 存在確認の`findOneBy`を`exist`に置き換え (#11224)

* refactor(backend): 存在確認の`findOneBy`を`exist`に置き換え

* cleanup

7 files changed, 64 insertions, 42 deletions

diff --git a/packages/backend/src/server/api/endpoints/users/followers.ts b/packages/backend/src/server/api/endpoints/users/followers.ts
index c6f71474bc..18d66500ab 100644
--- a/packages/backend/src/server/api/endpoints/users/followers.ts
+++ b/packages/backend/src/server/api/endpoints/users/followers.ts
@@ -97,11 +97,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				if (me == null) {
 					throw new ApiError(meta.errors.forbidden);
 				} else if (me.id !== user.id) {
-					const following = await this.followingsRepository.findOneBy({
-						followeeId: user.id,
-						followerId: me.id,
+					const isFollowing = await this.followingsRepository.exist({
+						where: {
+							followeeId: user.id,
+							followerId: me.id,
+						},
 					});
-					if (following == null) {
+					if (!isFollowing) {
 						throw new ApiError(meta.errors.forbidden);
 					}
 				}
diff --git a/packages/backend/src/server/api/endpoints/users/following.ts b/packages/backend/src/server/api/endpoints/users/following.ts
index b072c96626..6ea7b923d6 100644
--- a/packages/backend/src/server/api/endpoints/users/following.ts
+++ b/packages/backend/src/server/api/endpoints/users/following.ts
@@ -97,11 +97,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				if (me == null) {
 					throw new ApiError(meta.errors.forbidden);
 				} else if (me.id !== user.id) {
-					const following = await this.followingsRepository.findOneBy({
-						followeeId: user.id,
-						followerId: me.id,
+					const isFollowing = await this.followingsRepository.exist({
+						where: {
+							followeeId: user.id,
+							followerId: me.id,
+						},
 					});
-					if (following == null) {
+					if (!isFollowing) {
 						throw new ApiError(meta.errors.forbidden);
 					}
 				}
diff --git a/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts b/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts
index cccffcdad4..beb0ba85ff 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts
@@ -84,11 +84,13 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private roleService: RoleService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const list = await this.userListsRepository.findOneBy({
-				id: ps.listId,
-				isPublic: true,
+			const listExist = await this.userListsRepository.exist({
+				where: {
+					id: ps.listId,
+					isPublic: true,
+				},
 			});
-			if (list === null) throw new ApiError(meta.errors.noSuchList);
+			if (!listExist) throw new ApiError(meta.errors.noSuchList);
 			const currentCount = await this.userListsRepository.countBy({
 				userId: me.id,
 			});
@@ -114,18 +116,22 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				});
 
 				if (currentUser.id !== me.id) {
-					const block = await this.blockingsRepository.findOneBy({
-						blockerId: currentUser.id,
-						blockeeId: me.id,
+					const blockExist = await this.blockingsRepository.exist({
+						where: {
+							blockerId: currentUser.id,
+							blockeeId: me.id,
+						},
 					});
-					if (block) {
+					if (blockExist) {
 						throw new ApiError(meta.errors.youHaveBeenBlocked);
 					}
 				}
 
-				const exist = await this.userListJoiningsRepository.findOneBy({
-					userListId: userList.id,
-					userId: currentUser.id,
+				const exist = await this.userListJoiningsRepository.exist({
+					where: {
+						userListId: userList.id,
+						userId: currentUser.id,
+					},
 				});
 
 				if (exist) {
diff --git a/packages/backend/src/server/api/endpoints/users/lists/favorite.ts b/packages/backend/src/server/api/endpoints/users/lists/favorite.ts
index ea1a022bec..2c09a47fef 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/favorite.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/favorite.ts
@@ -41,21 +41,25 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private idService: IdService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const userList = await this.userListsRepository.findOneBy({
-				id: ps.listId,
-				isPublic: true,
+			const userListExist = await this.userListsRepository.exist({
+				where: {
+					id: ps.listId,
+					isPublic: true,
+				},
 			});
 
-			if (userList === null) {
+			if (!userListExist) {
 				throw new ApiError(meta.errors.noSuchList);
 			}
 
-			const exist = await this.userListFavoritesRepository.findOneBy({
-				userId: me.id,
-				userListId: ps.listId,
+			const exist = await this.userListFavoritesRepository.exist({
+				where: {
+					userId: me.id,
+					userListId: ps.listId,
+				},
 			});
 
-			if (exist !== null) {
+			if (exist) {
 				throw new ApiError(meta.errors.alreadyFavorited);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/users/lists/push.ts b/packages/backend/src/server/api/endpoints/users/lists/push.ts
index 925037e484..6e1f6b2c62 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/push.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/push.ts
@@ -100,18 +100,22 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 			// Check blocking
 			if (user.id !== me.id) {
-				const block = await this.blockingsRepository.findOneBy({
-					blockerId: user.id,
-					blockeeId: me.id,
+				const blockExist = await this.blockingsRepository.exist({
+					where: {
+						blockerId: user.id,
+						blockeeId: me.id,
+					},
 				});
-				if (block) {
+				if (blockExist) {
 					throw new ApiError(meta.errors.youHaveBeenBlocked);
 				}
 			}
 
-			const exist = await this.userListJoiningsRepository.findOneBy({
-				userListId: userList.id,
-				userId: user.id,
+			const exist = await this.userListJoiningsRepository.exist({
+				where: {
+					userListId: userList.id,
+					userId: user.id,
+				},
 			});
 
 			if (exist) {
diff --git a/packages/backend/src/server/api/endpoints/users/lists/show.ts b/packages/backend/src/server/api/endpoints/users/lists/show.ts
index 8077841c8c..3fd418d04e 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/show.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/show.ts
@@ -69,10 +69,12 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 					userListId: ps.listId,
 				});
 				if (me !== null) {
-					additionalProperties.isLiked = (await this.userListFavoritesRepository.findOneBy({
-						userId: me.id,
-						userListId: ps.listId,
-					}) !== null);
+					additionalProperties.isLiked = await this.userListFavoritesRepository.exist({
+						where: {
+							userId: me.id,
+							userListId: ps.listId,
+						},
+					});
 				} else {
 					additionalProperties.isLiked = false;
 				}
diff --git a/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts b/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts
index be8e317816..a7c3b58947 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts
@@ -39,12 +39,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private userListFavoritesRepository: UserListFavoritesRepository,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const userList = await this.userListsRepository.findOneBy({
-				id: ps.listId,
-				isPublic: true,
+			const userListExist = await this.userListsRepository.exist({
+				where: {
+					id: ps.listId,
+					isPublic: true,
+				},
 			});
 
-			if (userList === null) {
+			if (!userListExist) {
 				throw new ApiError(meta.errors.noSuchList);
 			}