Question

我去年才开始学习计算机科学，尽管阅读了有关该主题的教科书，但我一直在挣扎。我找不到任何有关将ajax表单数据发送到python，然后在字典中进行检查，然后将其解析为json对象的信息。只是对此感到困惑。我知道字典有键和值对，试图获得用户输入的键和值...

我尝试不处理KeyError代码（例如KeyError），或更改字典的键，但我真的不知道从哪里开始。第一个代码是python，第二个代码是javascript

  <div class="modal-content">
    <p>Enter new chatroom name</p>
    <form id="form1">
           <input id="chatroom" autocomplete="off" autofocus placeholder="Name" type="text">
           <input type="submit" class="submit_button" value="Submit">
    </form>
  </div>


class chatrooms(dict):
    # __init__ function
    def __init__(self):
        self = dict()
    # Function to add key:value
    def add(self, key, value):
        self[key] = value

chats = chatrooms()

#user to add a new channel
@app.route("/add_chatroom", methods=["POST"])
def create_chatroom():
    # get chatroom name
    chatroom = request.form.get("chatroom")
    # get user name from local storage
    username = request.form.get("username") # isn't this a string

    # if the chatroom does not yet exist
    chats.add(username, chatroom)

    return jsonify({"success": True, "chatroom": chats[username][chatroom]})

    return jsonify({"success": False})

    document.querySelector('#form1').onsubmit = function() {
        const request = new XMLHttpRequest();
        const chatroom = document.querySelector('#chatroom').value;
        const username = localStorage.getItem('name');
        request.open('POST', '/add_chatroom');
        // Callback function for when request completes
        request.onload = () => {
            // Extract JSON data from request
            const data = JSON.parse(request.responseText);
            // Update the result div
            if (data.success) {
                const contents = `${data.chatroom}`
                alert(contents);
            }
            else {
                alert('There was an error.');
            }
        }

        // add data to send to the server
        const data = new FormData();
        data.append('chatroom', chatroom)
        data.append('username', username);

        // Send request
        request.send(data);
        return false;
      };

返回jsonify（{“ success”：True，“ chatroom”：chats [用户名] [chatroom]}） TypeError：字符串索引必须为整数

我遇到类似这样的错误，但是我不确定如何为自定义键键入字典。

感谢您的帮助

Answer 1

使用int：

return jsonify({ "success": True, "chatroom": chats[int(username)][int(chatroom)] })

尝试通过Ajax和Python添加用户输入的聊天室名称

1 个答案: