itstudio_manager/schema.sql

-- 用户表（若项目使用 Django auth，可忽略或与 auth_user 对应）
DROP TABLE IF EXISTS account;
CREATE TABLE account
(
    id         BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
    username   VARCHAR(150)    NOT NULL UNIQUE,
    password   VARCHAR(128)    NOT NULL,
    email      VARCHAR(254),
    full_name  VARCHAR(200),
    is_active  TINYINT(1)      NOT NULL DEFAULT 1,
    is_staff   TINYINT(1)      NOT NULL DEFAULT 0,
    created_at DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4
  COLLATE = utf8mb4_unicode_ci COMMENT ='系统用户/认证信息';

-- 物品类别
DROP TABLE IF EXISTS categories;
CREATE TABLE categories
(
    id          BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
    name        VARCHAR(150)    NOT NULL,
    parent_id   BIGINT UNSIGNED,
    description TEXT,
    created_at  DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at  DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    CONSTRAINT fk_categories_parent FOREIGN KEY (parent_id) REFERENCES categories (id) ON DELETE SET NULL
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4 COMMENT ='物品类别';

-- 物品（物品主表）
DROP TABLE IF EXISTS items;
CREATE TABLE items
(
    id                 BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
    code               VARCHAR(100)    NOT NULL UNIQUE,           -- 物品编号/资产编号
    name               VARCHAR(200)    NOT NULL,
    category_id        BIGINT UNSIGNED,
    model              VARCHAR(150),
    brand              VARCHAR(150),
    location           VARCHAR(200),
    total_quantity     INT             NOT NULL DEFAULT 0,
    available_quantity INT             NOT NULL DEFAULT 0,
    unit               VARCHAR(30)              DEFAULT '件',
    price              DECIMAL(12, 2)           DEFAULT NULL,
    purchase_date      DATE                     DEFAULT NULL,
    supplier           VARCHAR(200)             DEFAULT NULL,
    status             VARCHAR(50)              DEFAULT 'normal', -- 如 normal/disabled/lost/repair
    description        TEXT,
    image_path         VARCHAR(500),
    created_by         BIGINT UNSIGNED, -- 关联 account.id
    created_at         DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at         DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    CONSTRAINT fk_items_category FOREIGN KEY (category_id) REFERENCES categories (id) ON DELETE SET NULL,
    CONSTRAINT fk_items_creator FOREIGN KEY (created_by) REFERENCES account (id) ON DELETE SET NULL,
    INDEX (name),
    INDEX (code)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4 COMMENT ='物品基本信息';

-- 物品库存/流水（每次入库/出库/调整都记录）
DROP TABLE IF EXISTS item_transactions;
CREATE TABLE item_transactions
(
    id            BIGINT UNSIGNED                       NOT NULL AUTO_INCREMENT PRIMARY KEY,
    item_id       BIGINT UNSIGNED                       NOT NULL,
    trans_type    ENUM ('IN','OUT','ADJUST','TRANSFER') NOT NULL,
    quantity      INT                                   NOT NULL,
    from_location VARCHAR(200),
    to_location   VARCHAR(200),
    related_id    BIGINT UNSIGNED, -- 可关联采购单/借用记录/调拨单 id
    operator_id   BIGINT UNSIGNED, -- 关联 account.id（操作者）
    note          TEXT,
    created_at    DATETIME                              NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_trans_item FOREIGN KEY (item_id) REFERENCES items (id) ON DELETE CASCADE,
    CONSTRAINT fk_trans_operator FOREIGN KEY (operator_id) REFERENCES account (id) ON DELETE SET NULL,
    INDEX (item_id),
    INDEX (trans_type)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4 COMMENT ='物品出入库与调整流水';

-- 借用记录（借/还）
DROP TABLE IF EXISTS borrow_records;
CREATE TABLE borrow_records
(
    id          BIGINT UNSIGNED                                   NOT NULL AUTO_INCREMENT PRIMARY KEY,
    item_id     BIGINT UNSIGNED                                   NOT NULL,
    borrower    VARCHAR(100)                                      NOT NULL, -- 借入人（姓名，字符串）
    quantity    INT                                               NOT NULL DEFAULT 1,
    borrow_date DATETIME                                          NOT NULL DEFAULT CURRENT_TIMESTAMP,
    due_date    DATETIME                                                   DEFAULT NULL,
    return_date DATETIME                                                   DEFAULT NULL,
    status      ENUM ('BORROWED','RETURNED','OVERDUE','CANCELED') NOT NULL DEFAULT 'BORROWED',
    approver    VARCHAR(100)                                                DEFAULT NULL, -- 借出/审批人（姓名，字符串）
    note        TEXT,
    created_at  DATETIME                                          NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at  DATETIME                                          NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    CONSTRAINT fk_borrow_item FOREIGN KEY (item_id) REFERENCES items (id) ON DELETE CASCADE,
    INDEX (borrower),
    INDEX (status)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4 COMMENT ='借用/归还记录';

-- 财务记录（采购/报销等）
DROP TABLE IF EXISTS finance_records;
CREATE TABLE finance_records
(
    id              BIGINT UNSIGNED                                            NOT NULL AUTO_INCREMENT PRIMARY KEY,
    record_no       VARCHAR(100) UNIQUE,
    type            ENUM ('PURCHASE','REFUND','REPAIR','DEPRECIATION','OTHER') NOT NULL,
    related_item_id BIGINT UNSIGNED,
    amount          DECIMAL(14, 2)                                             NOT NULL DEFAULT 0.00,
    currency        VARCHAR(10)                                                         DEFAULT 'CNY',
    vendor          VARCHAR(200),
    occurred_at     DATETIME,
    recorded_by     BIGINT UNSIGNED, -- 关联 account.id（记录人）
    note            TEXT,
    created_at      DATETIME                                                   NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_finance_item FOREIGN KEY (related_item_id) REFERENCES items (id) ON DELETE SET NULL,
    CONSTRAINT fk_finance_user FOREIGN KEY (recorded_by) REFERENCES account (id) ON DELETE SET NULL,
    INDEX (record_no)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4 COMMENT ='财务相关记录';

-- 邮件通知规则/历史
DROP TABLE IF EXISTS email_notices;
CREATE TABLE email_notices
(
    id            BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
    name          VARCHAR(200),
    target_emails TEXT,         -- 以逗号分隔或 JSON 数组
    subject       VARCHAR(300),
    body          TEXT,
    enabled       TINYINT(1)      NOT NULL DEFAULT 1,
    schedule_cron VARCHAR(100), -- 若使用定时任务
    last_sent_at  DATETIME,
    created_at    DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at    DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4 COMMENT ='邮件通知规则/历史';

-- 附件表（文件存储路径）
DROP TABLE IF EXISTS attachments;
CREATE TABLE attachments
(
    id            BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
    related_table VARCHAR(100),    -- 指示关联表，如 'items'
    related_id    BIGINT UNSIGNED, -- 关联记录 ID
    file_name     VARCHAR(300),
    file_path     VARCHAR(1000),
    file_size     BIGINT UNSIGNED,
    content_type  VARCHAR(200),
    uploaded_by   BIGINT UNSIGNED, -- 关联 account.id（上传者）
    uploaded_at   DATETIME        NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT fk_attachments_user FOREIGN KEY (uploaded_by) REFERENCES account (id) ON DELETE SET NULL,
    INDEX (related_table, related_id)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8mb4 COMMENT ='文件附件存储索引表';