CODEWITHSUNDEEP
listflutterdart
user4383363
user4383363

Reputation:

type 'List<void>' is not a subtype of type 'List<DropdownMenuItem<Client>>'

I'm having issues simply printing what's inside a DropdownButton by looping the results of an API request that fetches the following:

[{id: 1, nome: foo}, ...]

This is the code for it.

return _response.data.map<Client>((i) => Client.fromJson(i)).toList();

Which oddly, when printing the variable that stores the above call is [Instance of 'Client', ...]

Then, in the view, I attempt to at least print each item:

DropdownButton<Client>(
  onChanged: (client) => print(client),
  items: _controller.clients
      .map(
        (i) => print(i),
      )
      .toList(),

But type 'List<void>' is not a subtype of type 'List<DropdownMenuItem<Client>>'. I am lost already.

Upvotes: 0

Views: 134

Answers (1)

Richard Heap
Richard Heap

Reputation: 51750

Where you are printing i, you instead need to be returning a DropDownMenuItem (with a child)

For example:

  items: _controller.clients.map((e) => DropDownMenuItem(value: e, child: Text(e.nome))).toList(),

Upvotes: 2

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