[英]Initialize configuration in application factory on flask
I saw some sample codes, but I can't understand some part of these codes.我看到了一些示例代码,但我无法理解这些代码的某些部分。
Here is the content of sample codes:以下是示例代码的内容:
.
├── app
│ ├── __init__.py
└── config.py
import os
basedir = os.path.abspath(os.path.dirname(__file__))
class Config:
SECRET_KEY = os.environ.get('SECRET_KEY') or 'hard to guess string'
# ...
@staticmethod
def init_app(app):
pass
class DevelopmentConfig(Config):
# ...
class TestingConfig(Config):
# ...
class ProductionConfig(Config):
# ...
config = {
'development': DevelopmentConfig,
'testing': TestingConfig,
'production': ProductionConfig,
'default': DevelopmentConfig
}
from flask import Flask, render_template
from config import config
# ...
def create_app(config_name):
app = Flask(__name__)
app.config.from_object(config[config_name])
config[config_name].init_app(app)
# ...
return app
I want to know the usage of these lines:我想知道这些行的用法:
config[config_name].init_app(app)
def init_app(app): pass
If I ignore it, what would happen?如果我忽略它,会发生什么?
In flask, init_app is the common method to combine the FlaskApp and the third-libs在flask中,init_app是FlaskApp和third-libs结合的常用方法
If you don't want to do something, don't define the init_app
method如果您不想做某事,请不要定义init_app
方法
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