Method pinDiscussion

api/server/models/User.ts:1336–1349

({ userId, discussionId })

  }

  public static async pinDiscussion({ userId, discussionId }) {
    if (!userId || !discussionId) {
      throw new Error('Bad data.');
    }

    await this.updateOne(
      { _id: userId },
      {
        $push: {
          pinnedDiscussionIds: discussionId,
        },
      },
    );
  }

  public static async unpinDiscussion({ userId, discussionId }) {
    if (!userId || !discussionId) {