新建小程序后端，新建数据库
This commit is contained in:
ChengCan
295
mini-program/database/sql/001_init_chat.sql
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295
mini-program/database/sql/001_init_chat.sql
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-- Chat schema and seed data for mini-program
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-- Target: MySQL 8+
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CREATE DATABASE IF NOT EXISTS mini_program
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DEFAULT CHARACTER SET utf8mb4
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COLLATE utf8mb4_unicode_ci;
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USE mini_program;
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SET FOREIGN_KEY_CHECKS=0;
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DROP TABLE IF EXISTS chat_message;
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DROP TABLE IF EXISTS chat_conversation_member;
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DROP TABLE IF EXISTS chat_conversation;
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DROP TABLE IF EXISTS chat_user;
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SET FOREIGN_KEY_CHECKS=1;
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CREATE TABLE IF NOT EXISTS chat_user (
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id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
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nickname VARCHAR(64) NULL,
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avatar_file_key VARCHAR(255) NULL COMMENT 'Stored file key, not URL',
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status TINYINT UNSIGNED NOT NULL DEFAULT 1 COMMENT '1-active 2-disabled 3-deleted',
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last_login_at DATETIME(3) NULL,
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created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
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updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
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PRIMARY KEY (id),
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KEY idx_status (status),
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KEY idx_created_at (created_at)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
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CREATE TABLE IF NOT EXISTS chat_conversation (
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id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
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title VARCHAR(128) NULL,
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conversation_type TINYINT UNSIGNED NOT NULL DEFAULT 1 COMMENT '1-direct 2-group',
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member_signature CHAR(64) NOT NULL COMMENT 'sha256 of sorted member user_ids, e.g. sha256("1,2")',
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status TINYINT UNSIGNED NOT NULL DEFAULT 1 COMMENT '1-active 2-archived',
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last_seq BIGINT UNSIGNED NOT NULL DEFAULT 0,
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message_count BIGINT UNSIGNED NOT NULL DEFAULT 0,
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last_message_preview VARCHAR(255) NULL,
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last_message_at DATETIME(3) NULL,
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created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
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updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
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PRIMARY KEY (id),
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UNIQUE KEY uk_type_member_signature (conversation_type, member_signature),
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KEY idx_last_message_at (last_message_at)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
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CREATE TABLE IF NOT EXISTS chat_conversation_member (
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conversation_id BIGINT UNSIGNED NOT NULL,
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user_id BIGINT UNSIGNED NOT NULL,
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member_role TINYINT UNSIGNED NOT NULL DEFAULT 2 COMMENT '1-owner 2-member',
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joined_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
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left_at DATETIME(3) NULL,
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PRIMARY KEY (conversation_id, user_id),
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KEY idx_user_conversation (user_id, conversation_id),
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CONSTRAINT fk_member_conv
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FOREIGN KEY (conversation_id) REFERENCES chat_conversation(id)
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ON DELETE CASCADE,
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CONSTRAINT fk_member_user
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FOREIGN KEY (user_id) REFERENCES chat_user(id)
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ON DELETE CASCADE
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
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CREATE TABLE IF NOT EXISTS chat_message (
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id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
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conversation_id BIGINT UNSIGNED NOT NULL,
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seq BIGINT UNSIGNED NOT NULL COMMENT 'Conversation-local incremental sequence',
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sender_user_id BIGINT UNSIGNED NULL COMMENT 'Null means assistant/system sender',
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role TINYINT UNSIGNED NOT NULL COMMENT '1-user 2-assistant 3-system 4-tool',
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content_type TINYINT UNSIGNED NOT NULL COMMENT '1-text 2-audio 3-image 4-json',
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content_text MEDIUMTEXT NULL,
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content_json JSON NULL,
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media_file_key VARCHAR(255) NULL COMMENT 'Stored file key, not URL',
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media_duration_ms INT UNSIGNED NULL,
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client_msg_id VARCHAR(64) NULL COMMENT 'Idempotency key from client',
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created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
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deleted_at DATETIME(3) NULL,
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PRIMARY KEY (id),
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UNIQUE KEY uk_conv_seq (conversation_id, seq),
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UNIQUE KEY uk_conv_client_msg (conversation_id, client_msg_id),
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KEY idx_conv_created (conversation_id, created_at),
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KEY idx_sender_created (sender_user_id, created_at),
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CONSTRAINT fk_msg_conv
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FOREIGN KEY (conversation_id) REFERENCES chat_conversation(id)
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ON DELETE CASCADE,
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CONSTRAINT fk_msg_sender_user
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FOREIGN KEY (sender_user_id) REFERENCES chat_user(id)
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ON DELETE SET NULL
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
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INSERT INTO chat_user (
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id,
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nickname,
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avatar_file_key,
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status,
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last_login_at,
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created_at,
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updated_at
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)
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VALUES
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(
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1,
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'Parent A',
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'avatars/parent-a.png',
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1,
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'2026-03-25 09:58:00.000',
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'2026-03-25 09:00:00.000',
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'2026-03-25 09:58:00.000'
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),
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(
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2,
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'Parent B',
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'avatars/parent-b.png',
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1,
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'2026-03-25 10:01:00.000',
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'2026-03-25 09:20:00.000',
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'2026-03-25 10:01:00.000'
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),
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(
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3,
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'Parent C',
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'avatars/parent-c.png',
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1,
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'2026-03-25 21:11:00.000',
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'2026-03-25 20:30:00.000',
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'2026-03-25 21:11:00.000'
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);
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INSERT INTO chat_conversation (
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id,
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title,
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conversation_type,
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member_signature,
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status,
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last_seq,
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message_count,
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last_message_preview,
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last_message_at,
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created_at,
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updated_at
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)
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VALUES
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(
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1,
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'Direct Chat',
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1,
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'17f8af97ad4a7f7639a4c9171d5185cbafb85462877a4746c21bdb0a4f940ca0',
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1,
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4,
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4,
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'user: Great, explain how to solve it.',
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'2026-03-25 10:00:30.000',
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'2026-03-25 10:00:00.000',
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'2026-03-25 10:00:30.000'
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),
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(
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2,
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'Family Group',
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2,
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'8a6ae15122001229edb8866f56e342af12ae8187203c3e3b33931743e7c0c48d',
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1,
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3,
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3,
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'user: Okay, we will wait in the living room.',
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'2026-03-25 21:16:10.000',
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'2026-03-25 21:15:00.000',
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'2026-03-25 21:16:10.000'
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);
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INSERT INTO chat_conversation_member (
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conversation_id,
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user_id,
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member_role,
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joined_at,
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left_at
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)
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VALUES
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(1, 1, 1, '2026-03-25 10:00:00.000', NULL),
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(1, 2, 2, '2026-03-25 10:00:00.000', NULL),
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(2, 1, 1, '2026-03-25 21:15:00.000', NULL),
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(2, 2, 2, '2026-03-25 21:15:00.000', NULL),
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(2, 3, 2, '2026-03-25 21:15:00.000', NULL);
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INSERT INTO chat_message (
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id,
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conversation_id,
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seq,
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sender_user_id,
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role,
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content_type,
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content_text,
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content_json,
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media_file_key,
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media_duration_ms,
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client_msg_id,
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created_at
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)
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VALUES
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(
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1001,
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1,
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1,
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1,
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1,
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1,
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'Hi, did you finish homework?',
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JSON_OBJECT('lang', 'en'),
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NULL,
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NULL,
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'c1-m1',
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'2026-03-25 10:00:05.000'
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),
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(
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1002,
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1,
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2,
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2,
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1,
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1,
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'Almost done, one question left.',
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JSON_OBJECT('lang', 'en'),
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NULL,
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NULL,
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'c1-m2',
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'2026-03-25 10:00:12.000'
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),
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(
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1003,
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1,
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3,
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NULL,
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2,
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1,
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'I can help explain the last question.',
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JSON_OBJECT('tone', 'assistant'),
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NULL,
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NULL,
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'c1-m3',
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'2026-03-25 10:00:20.000'
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),
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(
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1004,
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1,
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4,
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1,
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1,
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1,
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'Great, explain how to solve it.',
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JSON_OBJECT('lang', 'en'),
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NULL,
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NULL,
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'c1-m4',
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'2026-03-25 10:00:30.000'
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),
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(
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2001,
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2,
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1,
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1,
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1,
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1,
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'Dinner at 7?',
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JSON_OBJECT('lang', 'en'),
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NULL,
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NULL,
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'c2-m1',
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'2026-03-25 21:15:08.000'
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),
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(
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2002,
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2,
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2,
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3,
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1,
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2,
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NULL,
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JSON_OBJECT('note', 'voice message'),
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'audios/family-group-001.mp3',
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95000,
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'c2-m2',
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'2026-03-25 21:15:30.000'
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),
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(
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2003,
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2,
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3,
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2,
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1,
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1,
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'Okay, we will wait in the living room.',
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JSON_OBJECT('lang', 'en'),
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NULL,
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NULL,
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'c2-m3',
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'2026-03-25 21:16:10.000'
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);
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