following flask tutorial

.gitignore

@@ -6,4 +6,7 @@
 $*
 ~$*
 .$*
-*.db
+*.db
+venv/
+__pycache__/
+.vscode/

README.md

@@ -0,0 +1,6 @@
+```shell
+cd src
+python -m venv venv
+pip install flask
+flask --app main run
+```

src/__init__.py

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+import os
+
+from flask import Flask
+
+
+def create_app(test_config=None):
+    # create and configure the app
+    app = Flask(__name__, instance_relative_config=True)
+    app.config.from_mapping(
+        SECRET_KEY='dev',
+        DATABASE=os.path.join(app.instance_path, 'dbproj.db'),
+    )
+
+    if test_config is None:
+        app.config.from_pyfile('config.py', silent=True)
+    else:
+        app.config.from_mapping(test_config)
+
+    try:
+        os.makedirs(app.instance_path)
+    except OSError:
+        pass
+
+    @app.route('/hello')
+    def hello():
+        return 'Hello, World!'
+    from . import db
+    db.init_app(app)
+    return app

src/db.py

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+import sqlite3
+import click
+from flask import current_app, g
+
+def get_db():
+    if 'db' not in g:
+        g.db = sqlite3.connect(
+            current_app.config['DATABASE'],
+            detect_types=sqlite3.PARSE_DECLTYPES
+        )
+        g.db.row_factory = sqlite3.Row
+
+    return g.db
+
+
+def close_db(e=None):
+    db = g.pop('db', None)
+
+    if db is not None:
+        db.close()
+
+@click.command('init-db')
+def init_db():
+    db = get_db()
+    click.echo("Initializing database schema...")
+    with current_app.open_resource('sql/db_create_sqlite.sql') as f:
+        db.executescript(f.read().decode('utf8'))
+    click.echo("Initializing database triggers...")
+    with current_app.open_resource('sql/trigger_sqlite.sql') as f:
+        db.executescript(f.read().decode('utf8'))
+    click.echo("Initialized database.")
+
+def init_app(app):
+    app.teardown_appcontext(close_db)
+    app.cli.add_command(init_db)

src/sql/db_create.sql

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+drop database if exists bigwork;
+create database bigwork;
+
+create table `admin`
+(
+    passwd varchar(100) NOT NULL
+);
+
+insert into `admin` (`passwd`) values('');
+
+create table user
+(
+user_id         int             PRIMARY KEY AUTO_INCREMENT,
+user_name       varchar(100)    NOT NULL,
+user_mail       varchar(100)    NOT NULL,
+user_passwd     varchar(100)    NOT NULL,
+user_limit      int             NOT NULL,
+user_regtime    datetime        NOT NULL
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+create table book
+(
+book_id         int             PRIMARY KEY AUTO_INCREMENT,
+book_name       varchar(100)    NOT NULL,
+book_isbn       varchar(100)    DEFAULT NULL,
+book_publisher  varchar(100)    DEFAULT NULL,
+book_pubdate    datetime        DEFAULT NULL,
+book_lang       varchar(100)    DEFAULT NULL,
+user_id         int             NOT NULL,
+CONSTRAINT `fk_book_user_id` FOREIGN KEY (`user_id`) REFERENCES user(`user_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+create table document
+(
+doc_id      int             PRIMARY KEY AUTO_INCREMENT,
+doc_name    varchar(100)    NOT NULL,
+doc_url     varchar(100)    NOT NULL,
+doc_size    int             NOT NULL,
+doc_date    datetime        NOT NULL,
+doc_type    varchar(100)    NOT NULL,
+book_id     int             NOT NULL,
+user_id     int             NOT NULL,
+CONSTRAINT `fk_document_user_id` FOREIGN KEY (`user_id`) REFERENCES user(`user_id`),
+CONSTRAINT `fk_document_book_id` FOREIGN KEY (`book_id`) REFERENCES book(`book_id`),
+INDEX (doc_name(10)),
+INDEX (doc_date)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+create table note
+(
+note_id         int             PRIMARY KEY AUTO_INCREMENT,
+note_name       varchar(100)    NOT NULL,
+note_date       datetime        NOT NULL,
+note_content    mediumtext      NOT NULL DEFAULT '',
+book_id         int             NOT NULL,
+user_id         int             NOT NULL,
+CONSTRAINT `fk_note_user_id` FOREIGN KEY (`user_id`) REFERENCES user(`user_id`),
+CONSTRAINT `fk_note_book_id` FOREIGN KEY (`book_id`) REFERENCES book(`book_id`),
+INDEX (note_name(10))
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+create table record
+(
+record_time timestamp       PRIMARY KEY,
+record_type varchar(10)     NOT NULL,
+doc_URL     varchar(100)    NOT NULL,
+user_id     int             NOT NULL,
+INDEX (record_type)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+create table typetable
+(
+type_id     int             PRIMARY KEY AUTO_INCREMENT,
+type_name   varchar(20)     NOT NULL,
+UNIQUE (type_name)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+create table author
+(
+author_id     int             PRIMARY KEY AUTO_INCREMENT,
+author_name   varchar(50)     NOT NULL,
+INDEX (author_name(10))
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+create table book_author
+(
+author_id   int NOT NULL,
+book_id     int NOT NULL,
+PRIMARY KEY (`author_id`, `book_id`),
+CONSTRAINT `fk_ba_book_id` FOREIGN KEY (`book_id`) REFERENCES book(`book_id`),
+CONSTRAINT `fk_ba_author_id` FOREIGN KEY (`author_id`) REFERENCES author(`author_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+create table book_type
+(
+type_id  int    NOT NULL,
+book_id  int    NOT NULL,
+PRIMARY KEY (`type_id`, `book_id`),
+CONSTRAINT `fk_bt_book_id` FOREIGN KEY (`book_id`) REFERENCES book(`book_id`),
+CONSTRAINT `fk_bt_type_id` FOREIGN KEY (`type_id`) REFERENCES typetable(`type_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+
+create table user_stat
+(
+user_id         int PRIMARY KEY,
+user_usedspace  int NOT NULL DEFAULT 0,
+user_bookcount  int NOT NULL DEFAULT 0,
+user_doccount   int NOT NULL DEFAULT 0,
+user_typecount  int NOT NULL DEFAULT 0,
+CONSTRAINT `fk_user_stat_user` FOREIGN KEY REFERENCES user(`user_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;

src/sql/db_create_sqlite.sql

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+drop table if exists `admin`;
+drop table if exists user;
+drop table if exists book;
+drop table if exists document;
+drop table if exists note;
+drop table if exists record;
+drop table if exists typetable;
+drop table if exists author;
+drop table if exists book_author;
+drop table if exists book_type;
+drop table if exists user_stat;
+create table `admin`
+(
+    passwd varchar(100) NOT NULL
+);
+-- insert into `admin` (`passwd`) values('');
+-- sqlite default no foreign key
+PRAGMA FOREIGN_KEYS=ON;
+
+-- user
+drop table if exists user;
+create table user
+(
+user_id         INTEGER         PRIMARY KEY AUTOINCREMENT,
+user_name       varchar(100)    NOT NULL UNIQUE,
+user_mail       varchar(100)    NOT NULL UNIQUE,
+user_passwd     varchar(100)    NOT NULL,
+user_limit      int             NOT NULL,
+user_regtime    timestamp       NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+-- insert into user (`user_name`, `user_mail`, `user_passwd`, `user_limit`) values ('catfood', 'a@a.com', 'lil0', 100);
+
+-- book
+drop table if exists book;
+create table book
+(
+book_id         INTEGER         PRIMARY KEY AUTOINCREMENT,
+book_name       varchar(100)    NOT NULL,
+book_isbn       varchar(100)    DEFAULT NULL,
+book_publisher  varchar(100)    DEFAULT NULL,
+book_pubdate    datetime        DEFAULT NULL,
+book_lang       varchar(100)    DEFAULT NULL,
+user_id         int             NOT NULL,
+CONSTRAINT `fk_book_user_id` FOREIGN KEY (`user_id`) REFERENCES user(`user_id`) ON DELETE RESTRICT
+);
+
+-- insert into book (`book_name`, `book_isbn`, `book_publisher`, `book_pubdate`, `book_lang`, `user_id`) values ('mom pig', 'emm', NULL, NULL, 'CN', 1);
+
+-- document
+drop table if exists document;
+create table document
+(
+doc_id      INTEGER         PRIMARY KEY AUTOINCREMENT,
+doc_name    varchar(100)    NOT NULL,
+doc_url     varchar(100)    NOT NULL,
+doc_size    int             NOT NULL,
+doc_date    timestamp       NOT NULL DEFAULT CURRENT_TIMESTAMP,
+doc_type    varchar(100)    NOT NULL,
+book_id     int             NOT NULL,
+user_id     int             NOT NULL,
+CONSTRAINT `fk_document_user_id` FOREIGN KEY (`user_id`) REFERENCES user(`user_id`) ON DELETE RESTRICT,
+CONSTRAINT `fk_document_book_id` FOREIGN KEY (`book_id`) REFERENCES book(`book_id`) ON DELETE RESTRICT
+);
+create index `idx_doc_name` on document(doc_name);
+
+-- insert into document (`doc_name`,`doc_url`,`doc_size`,`doc_type`,`book_id`,`user_id`) values ("a.pdf", 'c:/shit/a.pdf', 10, 'pdf', 1, 1);
+
+-- note
+drop table if exists note;
+create table note
+(
+note_id         INTEGER         PRIMARY KEY AUTOINCREMENT,
+note_name       varchar(100)    NOT NULL,
+note_date       datetime        NOT NULL DEFAULT CURRENT_TIMESTAMP,
+note_content    text            NOT NULL DEFAULT '',
+book_id         int             NOT NULL,
+user_id         int             NOT NULL,
+CONSTRAINT `fk_note_user_id` FOREIGN KEY (`user_id`) REFERENCES user(`user_id`) ON DELETE RESTRICT,
+CONSTRAINT `fk_note_book_id` FOREIGN KEY (`book_id`) REFERENCES book(`book_id`) ON DELETE RESTRICT
+);
+create index `idx_note_name` on note(note_name);
+
+-- insert into note (`note_name`, `note_content`,`book_id`,`user_id`) values ('long ago', 'well, nothing', 1, 1);
+
+-- record
+drop table if exists record;
+create table record
+(
+record_time timestamp       PRIMARY KEY DEFAULT CURRENT_TIMESTAMP,
+record_type varchar(10)     NOT NULL,
+doc_URL     varchar(100)    NOT NULL,
+user_id     int             NOT NULL
+);
+
+-- insert into record (`record_type`,`doc_URL`,`user_id`)
+    -- values ('write', 'c:\a.pdf', 1);
+
+-- typetable
+drop table if exists typetable;
+create table typetable
+(
+type_id     INTEGER         PRIMARY KEY AUTOINCREMENT,
+type_name   varchar(20)     NOT NULL UNIQUE
+);
+-- insert into typetable (`type_name`) values ('sjot');
+
+-- author
+drop table if exists author;
+create table author
+(
+author_id     INTEGER         PRIMARY KEY AUTOINCREMENT,
+author_name   varchar(50)     NOT NULL
+);
+create index `idx_author_name` on author(author_name);
+-- insert into author (`author_name`) values ('alabama.shit');
+
+-- book_author
+drop table if exists book_author;
+create table book_author
+(
+author_id   int NOT NULL,
+book_id     int NOT NULL,
+PRIMARY KEY (`author_id`, `book_id`),
+CONSTRAINT `fk_ba_book_id` FOREIGN KEY (`book_id`) REFERENCES book(`book_id`) ON DELETE RESTRICT,
+CONSTRAINT `fk_ba_author_id` FOREIGN KEY (`author_id`) REFERENCES author(`author_id`) ON DELETE RESTRICT
+);
+-- insert into book_author values (1,1);
+
+-- book_type
+drop table if exists book_type;
+create table book_type
+(
+type_id  int    NOT NULL,
+book_id  int    NOT NULL,
+PRIMARY KEY (`type_id`, `book_id`),
+CONSTRAINT `fk_bt_book_id` FOREIGN KEY (`book_id`) REFERENCES book(`book_id`) ON DELETE RESTRICT,
+CONSTRAINT `fk_bt_type_id` FOREIGN KEY (`type_id`) REFERENCES typetable(`type_id`) ON DELETE RESTRICT
+);
+-- insert into book_type values (1,1);
+
+-- user_stat
+drop table if exists user_stat;
+create table user_stat
+(
+user_id         int PRIMARY KEY,
+user_limit      int NOT NULL,
+user_usedspace  int NOT NULL DEFAULT 0,
+user_bookcount  int NOT NULL DEFAULT 0,
+user_doccount   int NOT NULL DEFAULT 0,
+user_notecount  int NOT NULL DEFAULT 0,
+CONSTRAINT `fk_user_stat_user` FOREIGN KEY (`user_id`) REFERENCES user(`user_id`) ON DELETE RESTRICT,
+CONSTRAINT `ck_usedspace` CHECK (user_usedspace <= user_limit)
+);
+-- insert into user_stat values (1,1,1,1,1,1);

src/sql/trigger.sql

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+drop trigger if exists `trig_update_stat_book_ins`;
+DELIMITER ##
+create trigger `trig_update_stat_book_ins` 
+    after insert on book 
+    for each row begin
+    update user_stat set user_bookcount=user_bookcount+1 where user_stat.user_id=NEW.user_id;
+end ##
+DELIMITER ;
+
+drop trigger if exists `trig_update_stat_book_del`;
+DELIMITER ##
+create trigger `trig_update_stat_book_del` 
+    after delete on book 
+    for each row begin
+    update user_stat set user_bookcount=user_bookcount-1 where user_stat.user_id=OLD.user_id;
+end ##
+DELIMITER ;
+
+drop trigger if exists `trig_update_stat_doc_ins`;
+DELIMITER ##
+create trigger `trig_update_stat_doc_ins` 
+    after insert on document 
+    for each row begin
+    update user_stat set user_doccount=user_doccount+1 where user_stat.user_id=NEW.user_id;
+    update user_stat set user_usedspace=user_usedspace+NEW.doc_size where user_stat.user_id=NEW.user_id;
+end ##
+DELIMITER ;
+
+drop trigger if exists `trig_update_stat_doc_del`;
+DELIMITER ##
+create trigger `trig_update_stat_doc_del` 
+    after delete on document 
+    for each row begin
+    update user_stat set user_doccount=user_doccount-1 where user_stat.user_id=OLD.user_id;
+    update user_stat set user_usedspace=user_usedspace-OLD.doc_size where user_stat.user_id=OLD.user_id;
+end ##
+DELIMITER ;
+
+drop trigger if exists `trig_update_stat_type_ins`;
+DELIMITER ##
+create trigger `trig_update_stat_type_ins` 
+    after insert on typetable
+    for each row begin
+    update user_stat set user_typecount=user_typecount+1 where user_stat.user_id=NEW.user_id;
+end ##
+DELIMITER ;
+
+drop trigger if exists `trig_update_stat_type_del`;
+DELIMITER ##
+create trigger `trig_update_stat_type_del` 
+    after delete on typetable
+    for each row begin
+    update user_stat set user_typecount=user_typecount-1 where user_stat.user_id=OLD.user_id;
+end ##
+DELIMITER ;

src/sql/trigger_sqlite.sql

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+drop trigger if exists `trig_create_user_stat`;
+create trigger `trig_create_user_stat` 
+    after insert on user
+    for each row begin
+    insert into user_stat (`user_id`, `user_limit`) values(NEW.user_id, NEW.user_limit);
+end;
+
+drop trigger if exists `trig_delete_user_stat`;
+create trigger `trig_delete_user_stat` 
+    after delete on user
+    for each row begin
+    delete from user_stat where user_id=OLD.user_id;
+end;
+
+drop trigger if exists `trig_update_stat_book_ins`;
+create trigger `trig_update_stat_book_ins` 
+    after insert on book 
+    for each row begin
+    update user_stat set user_bookcount=user_bookcount+1 where user_stat.user_id=NEW.user_id;
+end;
+
+
+drop trigger if exists `trig_update_stat_book_del`;
+create trigger `trig_update_stat_book_del` 
+    after delete on book 
+    for each row begin
+    update user_stat set user_bookcount=user_bookcount-1 where user_stat.user_id=OLD.user_id;
+end;
+
+
+drop trigger if exists `trig_update_stat_doc_ins`;
+create trigger `trig_update_stat_doc_ins` 
+    after insert on document 
+    for each row begin
+    update user_stat set user_doccount=user_doccount+1 where user_stat.user_id=NEW.user_id;
+    update user_stat set user_usedspace=user_usedspace+NEW.doc_size where user_stat.user_id=NEW.user_id;
+end;
+
+
+drop trigger if exists `trig_update_stat_doc_del`;
+create trigger `trig_update_stat_doc_del` 
+    after delete on document 
+    for each row begin
+    update user_stat set user_doccount=user_doccount-1 where user_stat.user_id=OLD.user_id;
+    update user_stat set user_usedspace=user_usedspace-OLD.doc_size where user_stat.user_id=OLD.user_id;
+end;
+
+
+drop trigger if exists `trig_update_stat_note_ins`;
+create trigger `trig_update_stat_note_ins` 
+    after insert on note
+    for each row begin
+    update user_stat set user_notecount=user_notecount+1 where user_stat.user_id=NEW.user_id;
+end;
+
+
+drop trigger if exists `trig_update_stat_note_del`;
+create trigger `trig_update_stat_note_del` 
+    after delete on note
+    for each row begin
+    update user_stat set user_notecount=user_notecount-1 where user_stat.user_id=OLD.user_id;
+end;

src/templates/index.html

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+<!DOCTYPE html>
+<html lang="zh">
+<head>
+  <title>DBProject</title>
+  <meta charset="utf-8">
+</head>
+<body>
+<h1>简单的电子书归档系统</h1>
+<div>
+    <p>首先需要登陆</p>
+    <a href="/loginuser">用户登陆</a>
+    <a href="/loginadmin">管理员登陆</a>
+</div>
+</body>
+</html>