Cakephp is generating empty options to "select" the component

I'm having trouble creating combobox components.

The cakephp is generating empty options to "select" the component.

<option value="1"></option>

<option value="2"></option>

<option value="3">Visita</option>

<option value="4">Proposta</option>

<option value="5"></option>

<option value="6"></option>

In the Controller 

$situacaoVendas = $this->SituacaoVenda->find('list');

In the View

echo $this->Form->input('situacao_venda_id');

The html output was

<select name="data[PessoasIteracao][situacao_venda_id]" id="PessoasIteracaoSituacaoVendaId">

<option value="1"></option>

<option value="2"></option>

<option value="3">Visita</option>

<option value="4">Proposta</option>

<option value="5"></option>

<option value="6"></option>

</select>

The query execute by cakephp was

SELECT `SituacaoVenda`.`id`, `SituacaoVenda`.`nome` FROM `crm`.`situacao_vendas` AS `SituacaoVenda` WHERE 1 = 1

the result sql was 

id nome

-------------------

1 Telefone

2 Email

3 Agendamento

4 Visita

5 Anotação

The Model Class

<?php

App::uses('AppModel', 'Model');

/**

 * SituacaoVenda Model

 *

 */

class SituacaoVenda extends AppModel {

/**

 * Display field

 *

 * @var string

 */

public $displayField = 'nome';

}

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