Flask – SQLAlchemy成员增加
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内容图文
目录
简介
结构
$ tree -I "__pycache*|*.pyc" -FCL 3
.
|-- database.db
|-- readme.md
|-- templates/
| |-- addnew.html
| |-- home.html
| `-- show_all.html
`-- views.py
展示
1. 主页
2. 学生信息查看
3. 添加学生信息
技术
- Flask – SQLAlchemy的使用
- flask中表单数据的传递
运行
python .\views.py代码
创建数据库表单
# crdb.py
import sqlite3
conn = sqlite3.connect('database.db')
print "Opened database successfully";
conn.execute('CREATE TABLE students (name TEXT, addr TEXT, city TEXT, pin TEXT)')
print "Table created successfully";
conn.close()views视图
from flask import Flask, request, flash, url_for, redirect, render_template
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///database.db'
app.config['SECRET_KEY'] = "random string"
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)
class Student(db.Model):
# __tablename__ = 'student'
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(100))
city = db.Column(db.String(50))
addr = db.Column(db.String(200))
pin = db.Column(db.String(10))
def __init__(self, name, city, addr, pin):
self.name = name
self.city = city
self.addr = addr
self.pin = pin
@app.route('/')
def home():
"""主页"""
return render_template('home.html')
@app.route('/show_all')
def show_all():
"""展示所有"""
data = Student.query.all()
return render_template('show_all.html', students=data)
@app.route('/addnew', methods=['GET', 'POST'])
def addnew():
"""添加新成员"""
if request.method == 'POST':
f_name = request.form['name']
f_city = request.form['city']
f_addr = request.form['addr']
f_pin = request.form['pin']
if not f_name or not f_city or not f_addr:
flash('请填入必要项')
else:
stuinfo = Student(f_name, f_city, f_addr, f_pin)
db.session.add(stuinfo)
db.session.commit()
flash('添加成功')
return redirect(url_for('show_all'))
return render_template('addnew.html')
if __name__ == '__main__':
# db.drop_all()
db.create_all()
app.run(debug=True)
home主页
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>主页</title>
</head>
<body>
<h1><a href = "/show_all">查看学生信息</a></h1>
<br>
<h1><a href = "/addnew">添加学生信息</a></h1>
</body>
</html>添加成员addnew.html
<!DOCTYPE html>
<html>
<body>
<h3>学生信息表</h3>
<hr/>
{%- for category, message in get_flashed_messages(with_categories = true) %}
<div class = "alert alert-danger">
{{ message }}
</div>
{%- endfor %}
<form action = "{{ request.path }}" method = "post">
<label for = "name">姓名</label><br>
<input type = "text" name = "name" placeholder = "张三" /><br><br>
<label for = "city">城市</label><br>
<input type = "text" name = "city" placeholder = "北京" /><br><br>
<label for = "addr">地址</label><br>
<textarea name = "addr" placeholder = "朝阳区大望路"></textarea><br><br>
<label for = "PIN">邮编</label><br>
<input type = "text" name = "pin" placeholder = "100000" /><br><br>
<input type = "submit" value = "输入" />
</form>
<h3><a href="{{ url_for('home') }}">返回主页</a></h3>
</body>
</html>展示页show_all
<!DOCTYPE html>
<html lang="en">
<head></head>
<body>
<h2> 学生表</h2>
<hr>
<h3><a href="{{ url_for('addnew') }}">添加新成员</a></h3>
<table border="1">
<thead>
<tr>
<th>姓名</th>
<th>城市</th>
<th>地址</th>
<th>邮编</th>
</tr>
</thead>
<tbody>
{% for student in students %}
<tr>
<td>{{ student.name }}</td>
<td>{{ student.city }}</td>
<td>{{ student.addr }}</td>
<td>{{ student.pin }}</td>
</tr>
{% endfor %}
</tbody>
</table>
<br>
<h3>消息提示</h3>
<div class="widget-content" style="height: 100px;width:50%;border:1px solid #ccc;">
消息通知：
{%- for message in get_flashed_messages() %}
{{ message }}
{%- endfor %}
</div>
<br>
<h3><a href="{{ url_for('home') }}">返回主页</a></h3>
</body>
</html>内容总结
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