Flutter: how to handle a JSON that has list of list of objects?

Question

I am creating a flutter project and I do an HTTP GET request where I get back the following JSON:

[
     {
        "type": "Type one",
        "elements": [{
                "name": "Type one 1 name",
                "code": "TYPEONE_1"
            },
            {
                "name": "Type one 2 name",
                "code": "TYPEONE_2"
            },
            {
                "name": "Type one 3 name",
                "code": "TYPEONE_3"
            }
        ]
    },
    {
        "type": "Type two",
        "elements": [{
                "name": "Type two 1 name",
                "code": "TYPETWO_1"
            },
            {
                "name": "Type two 2 name",
                "code": "TYPETWO_2"
            }
        ]
    }
]

I created these classes:

class Type {
  String type;
  List<Element> elements;
}

class Element {
  String name;
  String code;
}

But from here how to decode the JSON response into a list of Type?

Thanks in advance.

You can use this site to create classes according to your JSON data, then you can use their constructors to convert your data into objects. — Ουιλιαμ Αρκευα
– Ουιλιαμ Αρκευα, Commented Jun 20, 2021 at 1:37

Hadi Norouzi · Accepted Answer · 2021-06-20 05:54:52Z

1

This model is for your response:


class Model {
    List<Type> el;
}

class Type {
    String type;
    List<Element> elements;
}

class Element {
    String name;
    String code;
}

answered Jun 20, 2021 at 5:54

Hadi Norouzi

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