fix(buffer): check if key exists

packages/db/src/buffers/profile-buffer-redis.ts

@@ -44,6 +44,14 @@ export class ProfileBuffer extends BaseBuffer {
     return `${this.redisProfilePrefix}${projectId}:${profileId}`;
   }
 
+  async alreadyExists(profile: IClickhouseProfile) {
+    const cacheKey = this.getProfileCacheKey({
+      profileId: profile.id,
+      projectId: profile.project_id,
+    });
+    return (await getRedisCache().exists(cacheKey)) === 1;
+  }
+
   async add(profile: IClickhouseProfile, isFromEvent = false) {
     const logger = this.logger.child({
       projectId: profile.project_id,
@@ -53,13 +61,13 @@ export class ProfileBuffer extends BaseBuffer {
     try {
       logger.debug('Adding profile');
 
-      const existingProfile = await this.fetchFromCache(profile, logger);
-
-      if (isFromEvent && existingProfile) {
+      if (isFromEvent && (await this.alreadyExists(profile))) {
         logger.debug('Profile already created, skipping');
         return;
       }
 
+      const existingProfile = await this.fetchProfile(profile, logger);
+
       const mergedProfile: IClickhouseProfile = existingProfile
         ? deepMergeObjects(existingProfile, profile)
         : profile;
@@ -126,7 +134,7 @@ export class ProfileBuffer extends BaseBuffer {
     }
   }
 
-  private async fetchFromCache(
+  private async fetchProfile(
     profile: IClickhouseProfile,
     logger: ILogger,
   ): Promise<IClickhouseProfile | null> {