Flask中的藍圖(BluePrint)、
阿新 • • 發佈:2018-12-17
藍圖
1.初識Flask藍圖(BluePrint)
建立一個專案然後將目錄結構做成:
user.py中的內容
from flask import Blueprint, render_template # 匯入Flask中的藍圖BluePrint模組
# 例項化一個藍圖物件 users_blue = Blueprint('users', __name__, template_folder='user_temp', url_prefix='/user')
# 這裡新增路由和檢視函式的時候與在Flask物件中新增是一樣的
@users_blue.route('/user_add') # /user/user_add def user_add(): return render_template('user_add.html') # 會優先從外面找,如果外層有同名的html就展示的是外層的
app_blue.py中的內容
from flask import Flask, render_template, request, session, redirect import setting from serv import users # 匯入寫好的藍圖模組 app = Flask(__name__, template_folder='temp', static_folder='jingtaiwenjianmulu', static_url_path='/static') app.config.from_object(setting.Debug)
# 在Flask物件中註冊藍圖模組中的藍圖物件 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:
藍圖內部的檢視函式及route不要出現重複。
3.使用藍圖,做一個增刪改查使用者
要有一個檔案存放我們的原始資料
student_data.py檔案中的內容:
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'}, ]
然後我們根據以上內容進行增刪改查
3.1使用藍圖進行web應用搭建:
__init__.py檔案中的內容:
from flask import Flask def create_app(): app = Flask(__name__) return app
這個檔案我們會修改函式create_app中的程式碼
student_manager.py檔案中的內容:
from student import create_app flask_app = create_app() flask_app.run('0.0.0.0', 5000)
通過這種方式啟動Flask程式
3.2 使用藍圖檢視學生資訊
stu_list.html檔案的內容:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <title>學生列表</title> </head> <body> <a href="/stu_add">新增學生</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 }}">編輯</a> | <a href="/stu_delete?id={{ stu.id }}">刪除</a></td> </tr> {% endfor %} </tbody> </table> </body> </html>
stu_select.py檔案中的內容:
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檔案中的內容:
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藍圖,新增一個學生
stu_add.html中內容
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <title>新增學生</title> </head> <body> <form action="" method="post"> ID: <input type="text" name="id"> <br> 姓名: <input type="text" name="name"> <br> 年齡: <input type="text" name="age"> <br> 性別: <input type="text" name="gender"><br> <input type="submit" value="新增學生"> </form> </body> </html>
stu_add.py中的內容
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檔案中的內容
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藍圖,修改學生資訊
stu_update.html檔案中的內容:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <title>學生列表</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> 年齡:<input type="text" name="age" value="{{ student.age }}"><br> 性別:<input type="text" name="gender" value="{{ student.gender }}"><br> <input type="submit" value="修改資訊"> </form> </body> </html>
stu_update.py中的內容
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檔案中的內容:
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藍圖,刪除學生資訊