/**
  * Creates data provider instance with search query applied
  *
  * @param array $params
  *
  * @return ActiveDataProvider
  */
 public function search($params)
 {
     $query = Veiculo::find();
     $dataProvider = new ActiveDataProvider(['query' => $query]);
     $this->load($params);
     if (!$this->validate()) {
         // uncomment the following line if you do not want to return any records when validation fails
         // $query->where('0=1');
         return $dataProvider;
     }
     $query->andFilterWhere(['renavam' => $this->renavam, 'num_patrimonio' => $this->num_patrimonio, 'potencia' => $this->potencia, 'id_modelo' => $this->id_modelo, 'id_cor' => $this->id_cor, 'id_tipo_combustivel' => $this->id_tipo_combustivel, 'ano_fabricacao' => $this->ano_fabricacao, 'ano_modelo' => $this->ano_modelo]);
     $query->andFilterWhere(['like', 'cidade', $this->cidade])->andFilterWhere(['like', 'chassi', $this->chassi])->andFilterWhere(['like', 'lotacao', $this->lotacao])->andFilterWhere(['like', 'status', $this->status])->andFilterWhere(['like', 'observacao', $this->observacao])->andFilterWhere(['like', 'adquirido_de', $this->adquirido_de])->andFilterWhere(['like', 'uf_atual', $this->uf_atual])->andFilterWhere(['like', 'uf_anterior', $this->uf_anterior])->andFilterWhere(['like', 'placa_atual', $this->placa_atual])->andFilterWhere(['like', 'placa_anterior', $this->placa_anterior]);
     return $dataProvider;
 }
 /**
  * @return \yii\db\ActiveQuery
  */
 public function getIdVeiculo()
 {
     return $this->hasOne(Veiculo::className(), ['renavam' => 'id_veiculo']);
 }
 /**
  * @return \yii\db\ActiveQuery
  */
 public function getVeiculos()
 {
     return $this->hasMany(Veiculo::className(), ['id_modelo' => 'id']);
 }
<div class="abastecimento-form">

    <?php 
$form = ActiveForm::begin();
?>

    <?php 
echo $form->field($model, 'preco_litro')->textInput();
?>

    <?php 
echo $form->field($model, 'id_posto')->dropDownList(ArrayHelper::map(PostoAbastecimento::find()->all(), 'id', 'nome'), ['prompt' => 'Selecione uma opção']);
?>

    <?php 
echo $form->field($model, 'id_veiculo')->dropDownList(ArrayHelper::map(Veiculo::find()->all(), 'renavam', 'placa_atual'), ['prompt' => 'Selecione uma opção']);
?>

    <?php 
echo $form->field($model, 'km')->textInput();
?>

    <?php 
echo $form->field($model, 'id_motorista')->dropDownList(ArrayHelper::map(Motorista::find()->all(), 'cnh', 'nome'), ['prompt' => 'Selecione uma opção']);
?>

    <?php 
echo $form->field($model, 'data_abastecimento')->widget(DatePicker::className(), ['inline' => false, 'language' => 'pt', 'clientOptions' => ['autoclose' => true, 'format' => 'dd-mm-yyyy']]);
?>
    <div class="form-group">
        <?php 
 /**
  * @return \yii\db\ActiveQuery
  */
 public function getidveiculo()
 {
     return $this->hasOne(Veiculo::className(), ['idveiculo' => 'idveiculo']);
 }
 /**
  * @return \yii\db\ActiveQuery
  */
 public function getVeiculos()
 {
     return $this->hasMany(Veiculo::className(), ['id_tipo_combustivel' => 'id']);
 }
 /**
  * Finds the Veiculo model based on its primary key value.
  * If the model is not found, a 404 HTTP exception will be thrown.
  * @param integer $id
  * @return Veiculo the loaded model
  * @throws NotFoundHttpException if the model cannot be found
  */
 protected function findModel($id)
 {
     if (($model = Veiculo::find()->joinWith('atributoveiculo')->where(['veiculo.idveiculo' => $id])->one()) !== null) {
         return $model;
     } else {
         throw new NotFoundHttpException('The requested page does not exist.');
     }
 }
 /**
  * Finds the Veiculo model based on its primary key value.
  * If the model is not found, a 404 HTTP exception will be thrown.
  * @param integer $id
  * @return Veiculo the loaded model
  * @throws NotFoundHttpException if the model cannot be found
  */
 protected function findModel($id)
 {
     if (($model = Veiculo::findOne($id)) !== null) {
         return $model;
     } else {
         throw new NotFoundHttpException('The requested page does not exist.');
     }
 }