BlogSystem/schema.sql at main · programeGreenhand/BlogSystem · GitHub

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-- blog backend basic schema
-- Charset and engine chosen for MySQL 8+ (utf8mb4 for emoji support)

CREATE DATABASE IF NOT EXISTS `blog` DEFAULT CHARACTER SET = 'utf8mb4' DEFAULT COLLATE 'utf8mb4_general_ci';
USE `blog`;

-- Users
CREATE TABLE IF NOT EXISTS `users` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `username` VARCHAR(100) NOT NULL,
  `password` VARCHAR(255) NOT NULL,
  `email` VARCHAR(255) DEFAULT NULL,
  `avatar` VARCHAR(512) DEFAULT NULL,
  `bio` VARCHAR(512) DEFAULT NULL,
  `roles` VARCHAR(255) DEFAULT 'user',
  `status` TINYINT NOT NULL DEFAULT 1 COMMENT '1=active,0=disabled',
  `last_login` DATETIME DEFAULT NULL,
  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_users_username` (`username`),
  UNIQUE KEY `uk_users_email` (`email`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- Posts
CREATE TABLE IF NOT EXISTS `posts` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `author_id` BIGINT NOT NULL,
  `title` VARCHAR(255) NOT NULL,
  `summary` VARCHAR(512) DEFAULT NULL,
  `content` LONGTEXT NOT NULL,
  `status` TINYINT NOT NULL DEFAULT 1 COMMENT '1=published,0=draft,2=deleted',
  `view_count` INT NOT NULL DEFAULT 0,
  `like_count` INT NOT NULL DEFAULT 0,
  `comment_count` INT NOT NULL DEFAULT 0,
  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `idx_posts_author` (`author_id`),
  KEY `idx_posts_created_at` (`created_at`),
  CONSTRAINT `fk_posts_author` FOREIGN KEY (`author_id`) REFERENCES `users`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- Comments
CREATE TABLE IF NOT EXISTS `comments` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `post_id` BIGINT NOT NULL,
  `user_id` BIGINT NOT NULL,
  `parent_id` BIGINT DEFAULT NULL,
  `content` TEXT NOT NULL,
  `status` TINYINT NOT NULL DEFAULT 1 COMMENT '1=visible,0=hidden',
  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `idx_comments_post` (`post_id`),
  KEY `idx_comments_user` (`user_id`),
  CONSTRAINT `fk_comments_post` FOREIGN KEY (`post_id`) REFERENCES `posts`(`id`) ON DELETE CASCADE,
  CONSTRAINT `fk_comments_user` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- Likes (supports liking posts or comments)
CREATE TABLE IF NOT EXISTS `likes` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `user_id` BIGINT NOT NULL,
  `post_id` BIGINT DEFAULT NULL,
  `comment_id` BIGINT DEFAULT NULL,
  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_likes_user_post_comment` (`user_id`,`post_id`,`comment_id`),
  KEY `idx_likes_user` (`user_id`),
  CONSTRAINT `fk_likes_user` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
  CONSTRAINT `fk_likes_post` FOREIGN KEY (`post_id`) REFERENCES `posts`(`id`) ON DELETE CASCADE,
  CONSTRAINT `fk_likes_comment` FOREIGN KEY (`comment_id`) REFERENCES `comments`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- Friends / follows
CREATE TABLE IF NOT EXISTS `friends` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `user_id` BIGINT NOT NULL,
  `friend_id` BIGINT NOT NULL,
  `status` TINYINT NOT NULL DEFAULT 0 COMMENT '0=pending,1=accepted,2=blocked',
  `remark` VARCHAR(255) DEFAULT NULL,
  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `uk_friends_pair` (`user_id`,`friend_id`),
  KEY `idx_friends_user` (`user_id`),
  CONSTRAINT `fk_friends_user` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
  CONSTRAINT `fk_friends_friend` FOREIGN KEY (`friend_id`) REFERENCES `users`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- Messages (private messages / system notifications)
CREATE TABLE IF NOT EXISTS `messages` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `from_user_id` BIGINT DEFAULT NULL,
  `to_user_id` BIGINT NOT NULL,
  `type` VARCHAR(50) DEFAULT 'chat' COMMENT 'chat/system/notice',
  `content` TEXT NOT NULL,
  `is_read` TINYINT NOT NULL DEFAULT 0,
  `delivered` TINYINT NOT NULL DEFAULT 0,
  `status` TINYINT NOT NULL DEFAULT 1 COMMENT '1=normal,0=deleted',
  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `idx_messages_to` (`to_user_id`),
  KEY `idx_messages_from` (`from_user_id`),
  CONSTRAINT `fk_messages_from_user` FOREIGN KEY (`from_user_id`) REFERENCES `users`(`id`) ON DELETE SET NULL,
  CONSTRAINT `fk_messages_to_user` FOREIGN KEY (`to_user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- Notifications
CREATE TABLE IF NOT EXISTS `blog_notification` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `user_id` BIGINT NOT NULL COMMENT '接收通知的用户ID',
  `from_user_id` BIGINT DEFAULT NULL COMMENT '发送通知的用户ID',
  `type` VARCHAR(50) NOT NULL COMMENT 'LIKE/COMMENT/REPLY/FRIEND_REQUEST/FRIEND_ACCEPT',
  `target_id` BIGINT DEFAULT NULL COMMENT '目标ID（如动态ID、评论ID等）',
  `content` VARCHAR(500) DEFAULT NULL COMMENT '通知内容摘要',
  `is_read` TINYINT NOT NULL DEFAULT 0 COMMENT '0-未读，1-已读',
  `status` TINYINT NOT NULL DEFAULT 1 COMMENT '1-正常，0-删除',
  `create_time` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `update_time` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `idx_notification_user` (`user_id`),
  KEY `idx_notification_from_user` (`from_user_id`),
  KEY `idx_notification_type` (`type`),
  CONSTRAINT `fk_notification_user` FOREIGN KEY (`user_id`) REFERENCES `users`(`id`) ON DELETE CASCADE,
  CONSTRAINT `fk_notification_from_user` FOREIGN KEY (`from_user_id`) REFERENCES `users`(`id`) ON DELETE SET NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- Token blacklist (optional persistence for logout tokens)
CREATE TABLE IF NOT EXISTS `token_blacklist` (
  `id` BIGINT NOT NULL AUTO_INCREMENT,
  `token` VARCHAR(1024) NOT NULL,
  `expired_at` DATETIME DEFAULT NULL,
  `created_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  KEY `idx_token_blacklist_token` (`token`(255))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- Optional: admin / migration table
CREATE TABLE IF NOT EXISTS `schema_version` (
  `name` VARCHAR(128) NOT NULL,
  `version` VARCHAR(64) NOT NULL,
  `applied_at` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- Sample data (optional) -- uncomment to seed
-- INSERT INTO `users` (`username`,`password`,`email`) VALUES ('admin','<hashed_password>','admin@example.com');

-- End of schema