Flask - Flask的蓝图(BluePrint)

它的作用就是将 功能 与 主服务 分开怎么理解呢?

比如说,你有一个客户管理系统,最开始的时候,只有一个查看客户列表的功能,后来你又加入了一个添加客户的功能(add_user)模块,
然后又加入了一个删除客户的功能(del_user)模块,然后又加入了一个修改客户的功能(up_user)模块,在这个系统中,就可以将

查看客户,修改客户,添加客户,删除客户的四个功能做成蓝图加入到客户管理系统中,本篇最后会做一个这样的例子,但是首先我们要搞清楚什么是蓝图 blueprint

from flask import Blueprint  # 导入 Flask 中的蓝图 Blueprint 模块

sv = Blueprint("sv", __name__)  # 实例化一个蓝图(Blueprint)对象


@sv.route("/svlist")  # 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
def view_list():
    return "svlist_view_list"

from flask import Flask

# 导入此前写好的蓝图模块
from student_view import s_view

app = Flask(__name__)  # type:Flask

# 在Flask对象中注册蓝图模块中的蓝图对象 s_view 中的 sv
app.register_blueprint(s_view.sv)

app.run("0.0.0.0",5000)
# 现在Flask对象中并没有写任何的路由和视图函数

s_view.py 文件中的内容 :

from flask import Blueprint  # 导入 Flask 中的蓝图 Blueprint 模块
from flask import render_template

sv = Blueprint("sv",
               __name__,
               template_folder="sv_template",  # 每个蓝图都可以为自己独立出一套template模板文件夹,如果不写则共享项目目录中的templates
               static_folder="sv_static"  # 静态文件目录也是可以独立出来的
               )  # 实例化一个蓝图(Blueprint)对象


@sv.route("/svlist")
def view_list():
    return render_template("svlist.html")

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Titletitle>
head>
<body>
    Hello ! I am sv_template
    <img src="/sv_static/DragonFire.png">
body>
html>

from flask import Flask


def create_app():
    app = Flask(__name__)

    return app

from student import create_app

flask_app = create_app()

flask_app.run("0.0.0.0",5000)

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>学生列表title>
head>
<body>
<table border="3xp">
    <thead>
    <tr>
        <td>IDtd>
        <td>nametd>
        <td>agetd>
        <td>gendertd>
        <td>optionstd>
    tr>
    thead>
    <tbody>
    {% for foo in student %}
        <tr>
            <td>{{ foo.id }}td>
            <td>{{ foo["name"] }}td>
            <td>{{ foo.get("age") }}td>
            <td>{{ foo.gender }}td>
            <td> <a href="/s_update/{{ foo.id }}">修改a> | <a href="/s_del?id={{ foo.id }}">删除a> td>
        tr>
    {% endfor %}
    tbody>
table>
<a href="/s_add"> 添加学生 a>
body>
html>

from flask import Blueprint
from flask import render_template
from student_data import STUDENT

ss_blueprint = Blueprint("ss_b", __name__, template_folder="html", static_folder="static")


@ss_blueprint.route("/s_list")
def s_list():
    return render_template("s_list.html", student=STUDENT)

from flask import Flask
from student_select import stu_select


def create_app():
    app = Flask(__name__)  # type:Flask

    app.register_blueprint(stu_select.ss_blueprint)

    return app

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>学生列表title>
head>
<body>
<form 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>

from flask import Blueprint
from flask import redirect
from flask import request
from flask import render_template
from student_data import STUDENT

s_add = Blueprint("s_add", __name__, template_folder="html", static_folder="static") # type:Blueprint


@s_add.route("/s_add",methods=["GET","POST"])
def s_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("/s_list")

    return render_template("s_add.html")

from flask import Flask
from student_select import stu_select
from student_add import stu_add


def create_app():
    app = Flask(__name__)  # type:Flask

    app.register_blueprint(stu_select.ss_blueprint)
    app.register_blueprint(stu_add.s_add)

    return app

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>学生列表title>
head>
<body>
<form 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>

from flask import Blueprint
from flask import render_template
from flask import redirect
from flask import request
from student_data import STUDENT

s_update = Blueprint("s_update", __name__, template_folder="html", static_folder="static")


@s_update.route("/s_update/",methods=["GET","POST"])
def s_update_view(nid):
    if request.method == "POST":
        stu_id = int(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("/s_list")

    for stu in STUDENT:
        if stu["id"] == nid :
            return render_template("s_update.html", student=stu)

    return render_template("s_update.html", student="")

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__)  # type:Flask

    app.register_blueprint(stu_select.ss_blueprint)
    app.register_blueprint(stu_add.s_add)
    app.register_blueprint(stu_update.s_update)

    return app

from flask import Flask
from .views.auto import auto_bp
from .views.motor import motor_bp


def create_app():
    my_app = Flask(__name__) # type:Flask

    my_app.register_blueprint(auto_bp)
    my_app.register_blueprint(motor_bp)

    return my_app

1 from flask import Blueprint
2 
3 auto_bp = Blueprint("auto",__name__)
4 
5 @auto_bp.route("/auto")
6 def auto_func():
7     return "my_app.auto"

1 from flask import Blueprint
2 
3 motor_bp = Blueprint("motor",__name__)
4 
5 @motor_bp.route("/motor")
6 def motor_func():
7     return "my_app.motor"

1 from app import create_app
2 my_app = create_app()
3 
4 if __name__ == '__main__':
5     my_app.run()

Flask - Flask的蓝图(BluePrint)

Flask - Flask的蓝图(BluePrint)

一. 初始Flask蓝图

进阶Flask蓝图

使用蓝图做一个增删改查

1.使用蓝图进行web应用搭建:

2.使用Flask蓝图,查看学生信息

3.使用Flask蓝图,添加一个学生

4.使用Flask蓝图,修改学生信息

5.蓝图目录

2.使用Flask蓝图,查看学生信息

3. 使用Flask蓝图,添加一个学生

4. 使用Flask蓝图,修改学生信息

5. 蓝图目录

公告

只怕心老，不怕路长。

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