Flask - POST Error 405 Method Not Allowed
PythonHttpPostFlaskPython Problem Overview
I'm just starting to learn Flask, and I am trying to create a form which will allow a POST method.
Here's my method:
@app.route('/template', methods=['GET', 'POST'])
def template():
if request.method == 'POST':
return("Hello")
return render_template('index.html')
And my index.html:
<html>
<head>
<title> Title </title>
</head>
<body>
Enter Python to execute:
<form action="/" method="post">
<input type="text" name="expression" />
<input type="submit" value="Execute" />
</form>
</body>
</html>
Loading the form (rendering it when it receives GET) works fine. When I click on the submit button however, I get a POST 405 error Method Not Allowed.
Why isn't it displaying "Hello"?
Python Solutions
Solution 1 - Python
Your form is submitting to / when the method is routed for /template unless that is a typo, you should adjust your form's action attribute to point at the template view: action="{{ url_for('template') }}"
Solution 2 - Python
Replace:
<form action="/" method="post">
with:
<form action="{{ url_for('template') }}" method="post">
Solution 3 - Python
If you omit the action attribute, the form will post to the current URL.
Replace:
<form action="/" method="post">
with:
<form method="post">