Question

如何从应用程序主文件将变量传递到蓝图

假设我有以下示例应用程序。

#app.py

from flask import Flask
from example_blueprint import example_blueprint

data_to_pass="Hurray, You passed me"
app = Flask(__name__)
app.register_blueprint(example_blueprint)

#Blueprint

from flask import Blueprint

example_blueprint = Blueprint('example_blueprint', __name__)

@example_blueprint.route('/')
def index():
    return "This is an example app"

如何将data_to_pass传递给蓝图？是否有内置烧瓶？我正在尝试避免导入整个app.py文件...看起来并不优雅。

Answer 1

如果它是配置变量，则可以在app.py中添加app.config['data_to_pass']，在blueprint.py中添加from flask import current_app，然后可以使用它current_app.config['data_to_pass']。因此，代码应如下所示：


#app.py

from flask import Flask
from example_blueprint import example_blueprint

data_to_pass="Hurray, You passed me"
app = Flask(__name__)
app.config['data_to_pass'] = data_to_pass

app.register_blueprint(example_blueprint)

然后在蓝图中，您可以像这样阅读它

#Blueprint

from flask import Blueprint, current_app

example_blueprint = Blueprint('example_blueprint', __name__)

@example_blueprint.route('/')
def index():
    data_to_pass = current_app.config['data_to_pass']
    return "This is an example app"

这是我认为使用配置变量的最佳方法。

Flask将变量从应用程序主文件传递到蓝图

1 个答案: