蓝图
1.初识Flask蓝图(BluePrint)
创建一个项目然后将目录结构做成:
user.py中的内容
from flask import Blueprint, render_template # 导入Flask中的蓝图BluePrint模块 # 实例化一个蓝图对象 users_blue = Blueprint(‘users‘, __name__, template_folder=‘user_temp‘, url_prefix=‘/user‘)
# 这里添加路由和视图函数的时候与在Flask对象中添加是一样的
@users_blue.route(‘/user_add‘) # /user/user_add def user_add(): return render_template(‘user_add.html‘) # 会优先从外面找,如果外层有同名的html就展示的是外层的
app_blue.py中的内容
from flask import Flask, render_template, request, session, redirect import setting from serv import users # 导入写好的蓝图模块 app = Flask(__name__, template_folder=‘temp‘, static_folder=‘jingtaiwenjianmulu‘, static_url_path=‘/static‘) app.config.from_object(setting.Debug)# 在Flask对象中注册蓝图模块中的蓝图对象 users中的user_blue app.register_blueprint(users.users_blue) @app.route(‘/detail‘, endpoint=‘detail‘) def detail(): return render_template(‘detail.html‘) @app.route(‘/login‘, methods=[‘GET‘, ‘POST‘], strict_slashes=False) def login(): if request.method == ‘GET‘: return render_template(‘login.html‘) else: session[‘user‘] = request.form.get(‘username‘) return redirect(‘/‘) if __name__ == ‘__main__‘: app.run(debug=True)
巨坑:
蓝图内部的视图函数及route不要出现重复。
3.使用蓝图,做一个增删改查用户
要有一个文件存放我们的原始数据
student_data.py文件中的内容:
STUDENT = [ {‘id‘: 1, ‘name‘: ‘w‘, ‘age‘: 22, ‘gender‘: ‘中‘}, {‘id‘: 2, ‘name‘: ‘j‘, ‘age‘: 23, ‘gender‘: ‘男‘}, {‘id‘: 3, ‘name‘: ‘s‘, ‘age‘: 24, ‘gender‘: ‘女‘}, ]
然后我们根据以上内容进行增删改查
3.1使用蓝图进行web应用搭建:
__init__.py文件中的内容:
from flask import Flask def create_app(): app = Flask(__name__) return app
这个文件我们会修改函数create_app中的代码
student_manager.py文件中的内容:
from student import create_app flask_app = create_app() flask_app.run(‘0.0.0.0‘, 5000)
通过这种方式启动Flask程序
3.2 使用蓝图查看学生信息
stu_list.html文件的内容:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <title>学生列表</title> </head> <body> <a href="/stu_add">添加学生</a> <table border="3px"> <thead> <tr> <th>ID</th> <th>name</th> <th>age</th> <th>gender</th> <th>options</th> </tr> </thead> <tbody> {% for stu in student %} <tr> <td>{{ stu.id }}</td> <td>{{ stu.name }}</td> <td>{{ stu.age }}</td> <td>{{ stu.gender }}</td> <td><a href="/stu_update/{{ stu.id }}">编辑</a> | <a href="/stu_delete?id={{ stu.id }}">删除</a></td> </tr> {% endfor %} </tbody> </table> </body> </html>
stu_select.py文件中的内容:
from flask import Blueprint from flask import render_template from student_data import STUDENT stu_blueprint = Blueprint(‘stu_bp‘, __name__, template_folder=‘html‘, static_folder=‘static‘) @stu_blueprint.route(‘/stu_list‘) def stu_list(): return render_template(‘stu_list.html‘, student=STUDENT)
student/__init__.py文件中的内容:
from flask import Flask from student_select import stu_select def create_app(): app = Flask(__name__) app.register_blueprint(stu_select.stu_blueprint) return app
3.3使用Flask蓝图,添加一个学生
stu_add.html中内容
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <title>添加学生</title> </head> <body> <form action="" method="post"> ID: <input type="text" name="id"> <br> 姓名: <input type="text" name="name"> <br> 年龄: <input type="text" name="age"> <br> 性别: <input type="text" name="gender"><br> <input type="submit" value="添加学生"> </form> </body> </html>
stu_add.py中的内容
from flask import Blueprint from flask import redirect from flask import request from flask import render_template from student_data import STUDENT stu_add = Blueprint(‘stu_add‘, __name__, template_folder=‘html‘) @stu_add.route(‘/stu_add‘, methods=[‘GET‘, ‘POST‘]) def stu_add_view(): if request.method == ‘POST‘: stu_dic = { ‘id‘: request.form[‘id‘], ‘name‘: request.form[‘name‘], ‘age‘: request.form[‘age‘], ‘gender‘: request.form[‘gender‘], } STUDENT.append(stu_dic) return redirect(‘/stu_list‘) return render_template(‘stu_add.html‘)
student/__init__.py文件中的内容
from flask import Flask from student_select import stu_select from student_add import stu_add def create_app(): app = Flask(__name__) app.register_blueprint(stu_select.stu_blueprint) app.register_blueprint(stu_add.stu_add) return app
3.4使用Flask蓝图,修改学生信息
stu_update.html文件中的内容:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <title>学生列表</title> </head> <body> <form action="" method="post"> <input type="text" name="id" hidden value="{{ student.id }}"><br> 姓名:<input type="text" name="name" value="{{ student.name }}"><br> 年龄:<input type="text" name="age" value="{{ student.age }}"><br> 性别:<input type="text" name="gender" value="{{ student.gender }}"><br> <input type="submit" value="修改信息"> </form> </body> </html>
stu_update.py中的内容
from flask import Blueprint, request, render_template, redirect from student_data import STUDENT stu_update = Blueprint(‘stu_update‘, __name__, template_folder=‘html‘) @stu_update.route(‘/stu_update/<nid>‘, methods=[‘GET‘, ‘POST‘]) def stu_update_view(nid): if request.method == ‘POST‘: stu_id = request.form[‘id‘] stu_dic = { ‘id‘: stu_id, ‘name‘: request.form[‘name‘], ‘age‘: request.form[‘age‘], ‘gender‘: request.form[‘gender‘], } for index, stu in enumerate(STUDENT): if stu[‘id‘] == stu_id: STUDENT[index] = stu_dic return redirect(‘/stu_list‘) for stu in STUDENT: if stu[‘id‘] == nid: return render_template(‘stu_update.html‘, student=stu) return render_template(‘stu_update.html‘, student=‘‘)
student/__init__.py文件中的内容:
from flask import Flask from student_select import stu_select from student_add import stu_add from student_update import stu_update def create_app(): app = Flask(__name__) app.register_blueprint(stu_select.stu_blueprint) app.register_blueprint(stu_add.stu_add) app.register_blueprint(stu_update.stu_update) return app
3.5使用Flask蓝图,删除学生信息
原文地址:https://www.cnblogs.com/wjs521/p/10134486.html
时间: 2024-11-04 19:51:01