CODEWITHSUNDEEP
flutterdart
DanielRamiz
DanielRamiz

Reputation: 159

Query a list of list of objects in Dart?

I need to get all the details of a specific client: I have a list of list for the details of all the clients:

List<List<ClienteDetails>> _listaClientDetails = List<List<ClienteDetails>> ();

I want to get the details for a specific client, and I'm trying to do it by using this code: I

var result = _listaProductosFactura.where((detailsList) => detailsList.where((cliente) => cliente.id == id)).toList();

But this code is wrong. "The return type 'Iterable' isn't a 'bool', as required by the closure's context."

Does someone know what would be the right code?

Upvotes: 0

Views: 1454

Answers (1)

Morez
Morez

Reputation: 2229

The problem with your code is that this part of it doesn't return a boolean value :

detailsList.where((cliente) => cliente.id == id)

it returns an iterable from your inner list which is not a boolean. So the first "where" method cannot return an iterable as it doesn't have a boolean result

var result = _listaProductosFactura.where((detailsList) => //you must have a boolean result here not an iterable 
//but detailsList.where((cliente) => cliente.id == id) gives you an iterable

You can do something like this to get the result you want:

List<List<ClienteDetails>> _listaClientDetails = List<List<ClienteDetails>> ();
var result;

  for(List<ClienteDetails> clienteDetails in _listaClientDetails){
    result =  clienteDetails.where((cliente)=>cliente.id == id).toList();
//goes through the inner list and get the element where cliente.id == id

  }

Upvotes: 1

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