Python 如何在blueprint中使用flask_mysqldb

我正在使用带有蓝图的flask_mysqldb，我想初始化MySQL，但我有一个错误：

app.config.setdefault（'MYSQL\u HOST'，'localhost'）属性错误： “Blueprint”对象没有属性“config”

我在这里创建应用程序

from flask import Flask
from flask_cors import CORS
from .bodega import bodega


def create_app():
    app = Flask(__name__)
    cors = CORS(app, resources=r'/*')

    app.config['MYSQL_HOST'] = "localhost"
    app.config['MYSQL_USER'] = "root"  # Usuario de la base de datos
    app.config['MYSQL_PASSWORD'] = ""  # Contraseña de la base de datos
    app.config['MYSQL_DB'] = "inventario_bodega"  # Nombre de la base de datos
    app.config['SECRET_KEY'] = 'thisisthesecrectkey_de_uepc_2019'
    # app.config.from_object(Config)

    app.register_blueprint(bodega)

    return app

那是我的蓝图

from flask import Blueprint
bodega = Blueprint("bodega", __name__, url_prefix="/bodega")
from . import views

from flask import jsonify
from datetime import datetime

from . import bodega
from flask_mysqldb import MySQL

from app import db # Import from app here


@bodega.route('/show', methods=['GET'])
def show_bodega():
    try:
        cur = db.connection.cursor() # create a cursor
        cur.execute(
            """SELECT * FROM bodega 
            join item on bodega.id_item = item.id_item 
            join usuarios on bodega.id_usuario = usuarios.id_usuario 
            join images on bodega.id_image = images.id_image"""
        )
        data = cur.fetchall()
        cur.close()
        return jsonify(data), 202
    except:
        return "Error al extraer datos", 500

这里我想使用MySQL

from flask import jsonify
from datetime import datetime

from . import bodega
from flask_mysqldb import MySQL

# the error is here
mysql = MySQL(bodega)


@bodega.route('/show', methods=['GET'])
def show_bodega():
    try:
        cur = mysql.connection.cursor()
        cur.execute(
            """SELECT * FROM bodega 
            join item on bodega.id_item = item.id_item 
            join usuarios on bodega.id_usuario = usuarios.id_usuario 
            join images on bodega.id_image = images.id_image"""
        )
        data = cur.fetchall()
        cur.close()
        return jsonify(data), 202
    except:
        return "Error al extraer datos", 500

---

应用程序要求我将配置传递给blueprint，但我不知道问题在下面一行

mysql = MySQL(bodega)

相反，您应该将应用程序传递给

MySQL

app = create_app()
mysql = MySQL(app)

---

更多的考虑，阅读文档：

这个库对我来说几乎是死了。上几乎没有任何活动，所有这些都将被覆盖

---

您不想在蓝图中初始化db连接。您希望它出现在您的应用程序工厂中

from flask import Flask
from flask_cors import CORS
from .bodega import bodega

from flask_mysqldb import MySQL # Add the import in __init__

db = MySQL()


def create_app():
    app = Flask(__name__)
    cors = CORS(app, resources=r'/*')

    app.config['MYSQL_HOST'] = "localhost"
    app.config['MYSQL_USER'] = "root"
    app.config['MYSQL_PASSWORD'] = ""
    app.config['MYSQL_DB'] = "inventario_bodega"
    app.config['SECRET_KEY'] = 'thisisthesecrectkey_de_uepc_2019'

    db.init_app(app) # Initialise with the new app

    app.register_blueprint(bodega)

    return app

然后将数据库（db）导入到蓝图中

from flask import Blueprint
bodega = Blueprint("bodega", __name__, url_prefix="/bodega")
from . import views

from flask import jsonify
from datetime import datetime

from . import bodega
from flask_mysqldb import MySQL

from app import db # Import from app here


@bodega.route('/show', methods=['GET'])
def show_bodega():
    try:
        cur = db.connection.cursor() # create a cursor
        cur.execute(
            """SELECT * FROM bodega 
            join item on bodega.id_item = item.id_item 
            join usuarios on bodega.id_usuario = usuarios.id_usuario 
            join images on bodega.id_image = images.id_image"""
        )
        data = cur.fetchall()
        cur.close()
        return jsonify(data), 202
    except:
        return "Error al extraer datos", 500

---

我试图这么做，但我在应用程序导入中遇到了一个错误

创建应用程序导入错误：无法从“应用程序”（C:\Users\Becario\Desktop\uepc bodega backend\app\\ u init_uu.py）导入名称“创建应用程序”

我认为iMot还有一些其他问题