目录
导入相应包
创建接口
基于上述db对象创建一个Student
添加信息
显示学生信息
修改与删除信息
文章来源地址https://uudwc.com/A/MpB63
导入相应包
from flask import Flask
from flask_sqlalchemy import SQLAlchemy创建接口
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://root:123456@localhost:3306/studentinfo?charset=utf8'
app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = True # 这一行如果不添加，程序会报警告。
db= SQLAlchemy(app)基于上述db对象创建一个Student
class Student(db.Model):
id = db.Column(db.Integer, primary_key = True)
name = db.Column(db.String(100))
sex = db.Column(db.String(100))
studentId = db.Column(db.String(100))
chinese = db.Column(db.String(200))
math = db.Column(db.String(100))
english = db.Column(db.String(100))
def __init__(self, name, sex, studentId, chinese, math, english): # __init__方法负责对象的初始化
self.name = name
self.sex = sex
self.studentId = studentId
self.chinese = chinese
self.math = math
self.english = english
db.create_all() # 将上述类映射到数据库中：
添加信息
html页面
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>学生信息</title>
</head>
<body>
<h1>学生信息添加界面</h1>
<form action = "{{ request.path }}" method = "post">
<p><label for="name">姓名：</label><input type="text" name="name"></p>
<p><label for="studentId">学号：</label><input type="text" name="studentId"></p>
<p><label for="sex">性别</label><input type="radio" name="sex" value="男">男<input type="radio" name="sex" value="女">女</p>
<p><label for="chinese">语文</label><input type="number" name="chinese"></p>
<p><label for="math">数学</label><input type="number" name="math"></p>
<p><label for="english">英语</label><input type="number" name="english"></p>
<input type="submit" name="" value="添加">
</form>
</body>
</html>将表单的action直接指向当前路径，这就要求在当前路径所对应的函数中，对POST数据进行处理：
@app.route('/newstudent/', methods = ['GET', 'POST'])
def newstudent():
if request.method == 'POST':
if request.form['name'] and request.form['studentId'] and request.form['sex'] and request.form['chinese'] and request.form['math'] and request.form['english']:
curuser = Student(request.form['name'], request.form['studentId'], request.form['sex'], request.form['chinese'], request.form['math'], request.form['english'])
db.session.add(curuser)
db.session.commit()
return redirect(url_for('AllStudent'))
return render_template('info.html')
显示学生信息
html页面
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>学生信息列表</title>
</head>
<body>
<h1>学生信息列表</h1>
<h3>新建 (<a href = "{{ url_for('newstudent') }}">增加学生</a>)</h3>
<table border="1">
<thead>
<tr>
<th>姓名</th>
<th>学号</th>
<th>性别</th>
<th>语文</th>
<th>数学</th>
<th>英语</th>
</tr>
</thead>
<tbody>
{% for student in students %}
<tr>
<td>{{ student.name }}</td>
<td>{{ student.studentId }} </td>
<td> {{ student.sex }} </td>
<td>{{ student.chinese }} </td>
<td> {{ student.math }} </td>
<td>{{ student.english }} </td>
</tr>
{% endfor %}
</tbody>
</table>
</body>
</html>添加路由
@app.route('/allstudent/')
def AllStudent():
return render_template('allinfo.html', students = Student.query.all() )修改与删除信息
html页面如下
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>学生信息列表</title>
</head>
<body>
<h1>学生信息列表</h1>
<h3>新建 (<a href = "{{ url_for('newstudent') }}">增加学生</a>)</h3>
<table border="1">
<thead>
<tr>
<th>姓名</th>
<th>学号</th>
<th>性别</th>
<th>语文</th>
<th>数学</th>
<th>英语</th>
<th>操作</th>
</tr>
</thead>
<tbody>
{% for student in students %}
<tr>
<td>{{ student.name }}</td>
<td>{{ student.studentId }} </td>
<td> {{ student.sex }} </td>
<td>{{ student.chinese }} </td>
<td> {{ student.math }} </td>
<td>{{ student.english }} </td>
<td><a href = "{{ url_for('modifystudent', studentid=student.id) }}">修改</a> <a href = "{{ url_for('deletestudent', studentid=student.id) }}">删除</a></td>
</tr>
{% endfor %}
</tbody>
</table>
</body>
</html>修改代码如下
@app.route('/modifystudent/<studentid>/', methods = ['GET', 'POST'])
def modifystudent(studentid):
curuser = db.session.query(Student).filter_by(id=studentid).one()
if request.method == 'POST':
if request.form['studentId'] and request.form['sex'] and request.form['chinese'] and request.form['math'] and request.form['english']:
curuser.studentId = request.form['studentId']
curuser.sex = request.form['sex']
curuser.chinese = request.form['chinese']
curuser.math = request.form['math']
curuser.english = request.form['english']
db.session.commit()
return redirect(url_for('AllStudent'))
return render_template('modifyinfo.html', curuser=curuser)删除代码如下
@app.route('/deleteuser/<studentid>/')
def deletestudent(studentid):
db.session.query(Student).filter_by(id=studentid).delete()
db.session.commit()
return redirect(url_for('AllStudent'))文章来源：https://uudwc.com/A/MpB63
