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

我有一个发布到 Flask 路由的 HTML 表单.但是，request.form 是空的.如果我尝试通过 id 访问其中一个值，则会收到 400 错误.如何从 HTML 表单发布值并在 Flask 中访问它们?

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')

推荐答案

您的 input 没有 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 将引发 400 错误.

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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