Unhandled Exception: InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'List<dynamic>

Here are 2 common ways this could go wrong:

  1. If your response is a json object like

    [
        {
          key1: value1,
          key2: value2,
          key3: value3,
        },
        {
          key1: value1,
          key2: value2,
          key3: value3,
        },
    
        .....
    ] 
    

    Then, we use data[0]["name"], not data[0].name Unless we cast to an object that has the name property, we cannot use data[0].name

    We cast like this data = json.decode(response.body).cast<ObjectName>();

    ObjectName can be whatever object you want (Inbuilt or Custom). But make sure it has the name property

  2. If your response is a JSON object like

    {
        dataKey: [
          {
            key1: value1,
            key2: value2,
            key3: value3,
          } 
        ] 
    }
    

    Then json.decode will return a Map, not a List

    Map<String, dynamic> map = json.decode(response.body);
    List<dynamic> data = map["dataKey"];
    print(data[0]["name"]);
    

You can use new Map<String, dynamic>.from(snapshot.value);

Works perfect for me.


as doesn't change the type, it's just an assertion.

You need to use map['eventType'].cast<String, dynamic>() or Map<String, dynamic>.from(map['eventType'])

You can also solved by this way:

Map<String, dynamic> myMap = new Map<String, dynamic>.from(/*Your Source*/ );