使用数据库管理工具Navicat建表,表结构如下所示
flask使用pymysql之前需要先导入pymysql库,导入方法不再赘述
1.增加方法,页面代码如下
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/html">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div style="text-align: center">
<h1>新增人员</h1>
<form action="{{ url_for('web.mysqladd') }}" method="post">
姓名:<input name="username"> <br>
密码:<input name="password" type="password"> <br><br>
<input value="确定" type="submit"><br>
</form>
</div>
</body>
</html>
视图函数代码如下:
@web_blue.route('/mysqladd',methods=['GET','POST'])
def mysqladd():
if request.method == 'POST':
#获取前端传过来的参数
data = request.form
# 打开数据库连接
db = pymysql.connect("localhost", "root", "111111", "flaskblog")
# 使用 cursor() 方法创建一个游标对象 cursor
cursor = db.cursor()
sql = "INSERT INTO test(name,password)VALUES ('%s', %s)" % (data['username'], data['password'])
cursor.execute(sql)
db.commit()
db.close()
return redirect(url_for('web.mysqlindex'))
else:
return render_template('mysqladd.html')
2.查看方法,视图函数如下
@web_blue.route('/mysqlindex')
def mysqlindex():
# 打开数据库连接
db = pymysql.connect("localhost", "root", "111111", "flaskblog")
# 使用 cursor() 方法创建一个游标对象 cursor
cursor = db.cursor()
sql = "select * from test" #选择数据表里所有的用户
cursor.execute(sql)
testdata = cursor.fetchall()
db.commit()
db.close()
return render_template('mysqlindex.html',testdata=testdata)
页面代码如下,使用jinja页面渲染进行遍历
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>所有人员</h1>
<table>
<tr>
<th>ID</th>
<th>姓名</th>
<th>操作</th>
</tr>
{% for test in testdata %}
<tr>
<td>{{ test[0] }}</td>
<td>{{ test[1] }}</td>
<td>
<a href="{{ url_for('web.mysqldelete',uid=test[0]) }}">删除</a>
<a href="{{ url_for('web.mysqlmodify',uid=test[0]) }}">修改</a>
</td>
</tr>
{% endfor %}
</table>
</body>
</html>
3.删除视图函数如下,当点击显示页面的删除键时,触发该视图函数
@web_blue.route('/mysqldelete')
def mysqldelete():
# 获取url中传过来的uid
uid = request.args.get('uid')
# 打开数据库连接
db = pymysql.connect("localhost", "root", "111111", "flaskblog")
# 使用 cursor() 方法创建一个游标对象 cursor
cursor = db.cursor()
sql = "delete from test where id = %s" % (uid) # 删除该用户
cursor.execute(sql)
db.commit()
db.close()
return redirect(url_for('web.mysqlindex'))
4.修改视图函数如下,当点击显示页面的修改键时,先触发该视图函数条件语句中的else,进行提交时触发该视图函数条件语句上面的代码
@web_blue.route('/mysqlmodify',methods=['POST','GET'])
def mysqlmodify():
if request.method == 'POST':
data = request.form
# 打开数据库连接
db = pymysql.connect("localhost", "root", "111111", "flaskblog")
# 使用 cursor() 方法创建一个游标对象 cursor
cursor = db.cursor()
sql = "update test set name='%s',password='%s' where id =%s" \
% (data['username'],data['password'],data['uid'])
cursor.execute(sql)
db.commit()
db.close()
return redirect(url_for('web.mysqlindex'))
else:
uid = request.args.get('uid')
return render_template('modify.html',uid = uid)
else中modify.html如下
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>修改页面</h1>
<form method="post" action="{{ url_for('web.mysqlmodify') }}">
姓名:<input name="username"> <br>
密码:<input name="password" type="password"> <br><br>
<input hidden="hidden" name="uid" value="{{ uid }}">
<input value="修改" type="submit"><br>
</form>
</body>
</html>