#_*_ encoding: utf-8 _*_ @author: ty hery 2019/12/20
from flask import Flask, render_template, request, url_for, redirect
from flask_sqlalchemy import SQLAlchemy
from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField
from wtforms.validators import DataRequired
app = Flask(__name__)
#设置连接数据库的URL
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:666@10.0.0.105:3306/flask_test'
# 设置每次请求结束后会自动提交数据库中的改动
app.config['SQLALCHEMY_COMMIT_ON_TEARDOWN'] = True
# 查询时会显示原始SQL语句
app.config['SQLCHEMY_ECHO'] = True
class Config(object):
# 设置连接数据库的参数
SQLALCHEMY_DATABASE_URI = "mysql://root:666@10.0.0.105:3306/flask_test"
# 设置sqlalchemy自动跟踪数据库
SQLALCHEMY_TRACK_MODIFICATIONS = True
# 设置每次请求结束后会自动提交数据库中的改动
# SQLALCHEMY_COMMIT_ON_TEARDOWN = True
# 查询时会显示初始SQL语句
# SQLALCHEMY_ECHO = True
SECRET_KEY = 'doios87fsdaf7asdf6asfjljoewg'
app.config.from_object(Config)
db = SQLAlchemy(app)
class Author(db.Model):
# 定义表名
__tablename__='tbl_authors'
id = db.Column(db.SmallInteger, primary_key=True)
name = db.Column(db.String(8),unique=True)
books = db.relationship('Book',backref='author')
class Book(db.Model):
'''用户表'''
__tablename__ = 'tbl_books' # 指明数据库的表名
id = db.Column(db.SmallInteger, primary_key=True)
name = db.Column(db.String(8),unique=True)
author_id = db.Column(db.SmallInteger, db.ForeignKey('tbl_authors.id')) # 外键的类型必须和他所关联的属性一致
# 创建表单模型类
class AuthorBookForm(FlaskForm):
author_name = StringField(label=u'作者', validators=[DataRequired('作者必填')])
book_name = StringField(label=u'书籍', validators=[DataRequired('书籍必填')])
submit = SubmitField(label=u'保存')
print('当前的__name__ :',__name__ )
@app.route('/', methods=['GET', 'POST'])
def index():
# 创建表单对象
form = AuthorBookForm()
if form.validate_on_submit():
# 验证表单成功
# 提取表单数据
author_name = form.author_name.data
book_name = form.book_name.data
print('作者,书名: ',author_name,book_name,'------------')
# 保存到数据库
author_01 = Author(name=author_name)
db.session.add(author_01)
db.session.commit()
book = Book(name = book_name, author_id = author_01.id)
# book = Book(name = book_name, author = author_01) # 此处的author是反向引用的author
db.session.add(book)
db.session.commit()
# 查询数据库form
author_li = Author.query.all()
return render_template('author_book.html', authors = author_li, form = form)
@app.route('/delete_book',methods=['POST'])
def delete_book():
'''删除数据'''
# 如果前端发送是请求体数据是json格式, get_json会解析成字典
req_dict = request.get_json()
book_id = req_dict.get('book_id')
# 删除数据
book = Book.query.get(book_id)
db.session.delete(book)
db.session.commit()
return redirect(url_for('index'))
if __name__ == '__main__':
# 清除数据库里的所有数据
# db.drop_all()
#
# # 创建所有的表
# db.create_all()
#
# # 创建对象
# au_xi = Author(name='我吃西红柿')
# au_qian = Author(name='萧潜')
# au_san = Author(name='唐家三少')
# # session记录对象任务
# db.session.add_all([au_xi, au_qian, au_san])
# db.session.commit()
#
# bk_xi = Book(name='吞噬星空',author_id=au_xi.id)
# bk_xi2 = Book(name='寸芒',author_id=au_qian.id)
# bk_qian = Book(name='缥缈之旅',author_id=au_qian.id)
# bk_san = Book(name='冰火魔厨',author_id=au_san.id)
# db.session.add_all([bk_xi, bk_xi2, bk_qian, bk_san])
# # 提交任务到数据库中
# db.session.commit()
app.run(debug = True)
author_book.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form method="post">
{{ form.csrf_token }}
{{ form.author_name.label }}
<p>{{ form.author_name }}</p>
{% for msg in form.author_name.errors %}
<p>{{ msg }}</p>
{% endfor %}
{{ form.book_name.label }}
<p>{{ form.book_name }}</p>
{% for msg in form.book_name.errors %}
<p>{{ msg }}</p>
{% endfor %}
{{ form.submit }}
</form>
<hr/>
<ul>
{% for author in authors %}
<li>作者:{{ author.name }}</li>
<ul>
{% for book in author.books %}
<li>书籍:{{ book.name }}</li>
<a href="javascript:;" onclick="deleteBook({{ book.id }})">删除</a>
{% endfor %}
</ul>
{% endfor %}
</ul>
<script type="text/javascript" src="/statics\js\jquery-3.3.1.min.js"></script>
</body>
</html>