Question

我想使用flask和jquery将字典（button_state）从javascript传递到python。在jQuery方面，我有：

$(".btn#submit").click(function(event){
    newdata = JSON.stringify(buttons_state);
    console.log("submission button POST attempt: " + newdata)

    $.ajax({
        url: '/submission',
        dataType: 'json',
        type: 'post',
        contentType: 'application/json',
        data: newdata,
        processData: false,
        success: function(response){
            console.log(response);
        },
        error: function(error){
            console.log(error);
        }
    });

});

在服务器端：

@app.route('/submission', methods=['POST'])
def submission():
    info = request.get_json(silent=False)
    return info

但是我收到错误500：

Traceback (most recent call last):
  File "/Users/timrand/anaconda3/lib/python3.7/site- 
packages/flask/app.py", line 2292, in wsgi_app
    response = self.full_dispatch_request()
  File "/Users/timrand/anaconda3/lib/python3.7/site- 
packages/flask/app.py", line 1816, in full_dispatch_request
    return self.finalize_request(rv)
  File "/Users/timrand/anaconda3/lib/python3.7/site- 
packages/flask/app.py", line 1831, in finalize_request
    response = self.make_response(rv)
  File "/Users/timrand/anaconda3/lib/python3.7/site- 
packages/flask/app.py", line 1982, in make_response
    reraise(TypeError, new_error, sys.exc_info()[2])
  File "/Users/timrand/anaconda3/lib/python3.7/site- 
packages/flask/_compat.py", line 34, in reraise
    raise value.with_traceback(tb)
  File "/Users/timrand/anaconda3/lib/python3.7/site- 
packages/flask/app.py", line 1974, in make_response
rv = self.response_class.force_type(rv, request.environ)
  File "/Users/timrand/anaconda3/lib/python3.7/site- 
packages/werkzeug/wrappers.py", line 921, in force_type
response = BaseResponse(*_run_wsgi_app(response, environ))
  File "/Users/timrand/anaconda3/lib/python3.7/site- 
packages/werkzeug/test.py", line 923, in run_wsgi_app
    app_rv = app(environ, start_response)
TypeError: 'dict' object is not callable

view函数未返回有效响应。返回类型必须是字符串，元组，Response实例或可调用的WSGI，但这是一个命令。 127.0.0.1--[29 / Oct / 2018 07:53:48]“ POST / signUpUser HTTP / 1.1” 500-

服务器代码似乎无法正确检索数据，或者JSON.stringify将数据转换为字符串的方式存在问题。我已经读过许多其他有相同问题的文章，并尝试过堆栈溢出的解决方案，但只收到错误400。

Answer 1

我尝试使用另一种方法通过ajax将javascript字典发送到python-flask，并且效果很好。如果问题是服务器找不到数据（很有可能），您可以从我描述的方法（我认为这似乎是最简单的方法）中汲取灵感

我的配置不同，您可以查看this discussion或this link以获得更多信息。

1。在HTML方面：

分别加载jquery并向我的网站添加动态路径：

<script type=text/javascript src="{{url_for('static', filename='jquery.js') }}"> </script>

<script type=text/javascript>$SCRIPT_ROOT = {{ request.script_root|tojson|safe }}; </script>

2。在Jquery方面：

$(function(){
    $('.btn#submit').bind('click', function(){
        var dict = {};
        dict.key1 = "value1";
        dict.key2 = "value2";

        new_dict = JSON.stringify(dict);

        $.getJSON($SCRIPT_ROOT + '/_submission', {
            dict: new_dict,
        },function(data){
            alert("Data from flask" + data.new_dict_flask);
        });
    });
});

3。在烧瓶方面：

@app.route('/_submission')
def submission():
    new_dict_flask = request.args.get('dict')
    return jsonify(new_dict_flask=new_dict_flask)

如何将字典从javascript传递到flask？

1 个答案: