Filtering results not working

[Danil0v3s]

The docs says to do something like:

voos?empresa__equals=AMERICAN%20AIRLINES%20INC

But no matter which prop I search for or whatever I can not get the results to be filtered.

My piece of code
Schema

const voo = new mongoose.Schema(
    {
        "Cod  Empresa" : String,
        "last_updated" : { type: Date, default: Date.now },
        "Empresa" : String,
        "No VOO" : Number,
        "Equip" : String,
        "Seg" : String,
        "Ter" : String,
        "Qua" : String,
        "Qui" : String,
        "Sex" : String,
        "Sab" : String,
        "Dom" : String,
        "Qtde Assentos" : Number,
        "Numero Hotran" : String,
        "Data Solicitacao" : String,
        "Data Aprovacao" : String,
        "Data Vigencia" : String,
        "Natureza Operacao" : String,
        "No Etapa" : Number,
        "COD Origem" : String,
        "ARPT Origem" : String,
        "COD Destino" : String,
        "ARPT Destino" : String,
        "Horario Partida" : String,
        "Horario Chegada " : String,
        "CODESHARE" : String,
        "Observacao" : String,
        "Equip Alt" : String
    }
)

module.exports = restful.model('Voo', voo)

Service

Voo
    .methods(['get'])
    .updateOptions({ new: true, runValidators: true })
    .after('get', errorHandler)