从HTML表单发布值并在Flask视图中访问它们 [英] Post values from an HTML form and access them in a Flask view

问题描述

我有一个HTML表单，发布到Flask路由。但是， request.form 是空的。如果我尝试访问其中一个值，我得到一个400错误。如何从HTML表单中发布值并在Flask中访问它们？

$ b

 < form method = POST > 
< input id =my_inputtype =textvalue ={{email}}> 
< input id =my_submittype =submitvalue =Submit> 
< / form> 
  

  @ app.route （'/ page'，methods = ['POST'，'GET']）
 def get_page（）：
 if request.method =='POST'：
 print（request.form ）＃打印ImmutableMultiDict（[]）
 print（request.form ['my_input']）＃引发400错误
返回render_template（'page.html'）
  

解决方案您的输入没有< a href =https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input#attr-name =nofollow> name 属性。这就是客户端将传递给服务器的内容。如果您访问未提交的表单键，Flask将会引发400错误。

; input name =my_inputid =my_inputtype =textvalue ={{email}}>

I have an HTML form that gets posted to a Flask route. However, request.form is empty. If I try to access one of the values by id, I get a 400 error. How do I post values from an HTML form and access them in Flask?

<form method="POST">
  <input id="my_input" type="text" value="{{ email }}">
  <input id="my_submit" type="submit" value="Submit">
</form>

@app.route('/page', methods=['POST', 'GET'])
def get_page():
    if request.method == 'POST':
        print(request.form)  # prints ImmutableMultiDict([])
        print(request.form['my_input'])  # raises 400 error
    return render_template('page.html')

解决方案

Your input doesn't have a name attribute. That is what the client will pass along to the server. Flask will raise a 400 error if you access a form key that wasn't submitted.

<input name="my_input" id="my_input" type="text" value="{{ email }}">

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