英文:
Flask's order of rendering functions?
问题
我正在尝试建立一个基本的网站来练习Flask，并在我的`app.py`文件中包含以下内容：
```Python
from flask import Flask, render_template
app = Flask(__name__)
@app.route("/")
def hello_world():
return "Hello, world!"
@app.route('/')
def home():
return render_template('home.html')
if __name__ == "__main__":
app.run(
host="0.0.0.0",
debug=True
)
home.html的内容如下：
<div id="menubar">
<ul>
<li><a href="/">Home</a></li>
</ul>
</div>
我注意到当我运行python app.py时，“Hello, world!”被打印到屏幕上，但不显示home.html的内容。当我注释掉hello_world函数时，home.html的内容就被渲染出来了。
为什么会这样？我是否不了解某种渲染顺序？
<details>
<summary>英文:</summary>
I'm trying to set up a basic website to practice Flask and have the following in my `app.py` file:
```Python
from flask import Flask, render_template
app = Flask(__name__)
@app.route("/")
def hello_world():
return "Hello, world!"
@app.route('/')
def home():
return render_template('home.html')
if __name__ == "__main__":
app.run(
host="0.0.0.0",
debug=True
)
The contents of home.html are:
<div id="menubar">
<ul>
<li><a href="/">Home</a></li>
</ul>
</div>
I noticed that when I run the app as python app.py, Hello, world! is printed onto the screen but not home.html. When I comment out the hello_world function, then the contents of home.html are rendered.
Why is this? Is there some sort of rendering order that I'm not aware of?
答案1
得分: 2
每个路由都必须在@app.route()装饰器中定义，函数名称可以是您想要的任何名称。如果您想要两个不同的页面，您的app.py可能如下所示：
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/hello_world') # 这是 http://0.0.0.0:5000/hello_world
def hello_world():
return "Hello, world!"
@app.route('/') # 这是 http://0.0.0.0:5000
def home():
return render_template('home.html')
if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)
如果您想将字符串Hello, world传递给home.html，您的app.py可能如下所示：
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/') # 这是 http://0.0.0.0:5000
def home():
msg = "Hello, world!"
return render_template('home.html', msg=msg)
if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)
而您的home.html可能如下所示：
<div id="menubar">
<ul>
<li><a href="/">Home</a></li>
</ul>
</div>
<h1>{{ msg }}</h1>
英文:
Each route must be defined in the @app.route() decorator, the function names can be whatever you want them to be. If you want two different pages, your app.py could look like this:
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/hello_world') # this is http://0.0.0.0:5000/hello_world
def hello_world():
return "Hello, world!"
@app.route('/') # this is http://0.0.0.0:5000
def home():
return render_template('home.html')
if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)
If you want to pass the string Hello, world to home.html, your app.py could look like this:
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/') # this is http://0.0.0.0:5000
def home():
msg = "Hello, world!"
return render_template('home.html', msg=msg)
if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)
And your home.html could look like this:
<div id="menubar">
<ul>
<li><a href="/">Home</a></li>
</ul>
</div>
<h1>{{ msg }}</h1>
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