How to destructurate an object property that sometimes is received as null

Question

I have this object below that I receive via API, but sometimes the SimplesNacional property comes as null. How do I destructure(??) it only when it's not null, since it has some nested properties that break my program in the destructuration?

This is the object:

const {
    Retorno: {
        ReceitaPJ: {
            NumeroInscricao: numeroInscricao,
            Matriz: matriz,
            DataAbertura: dataAbertura,
            NomeEmpresarial: nomeEmpresarial,
            NomeFantasia: nomeFantasia,
            NaturezaJuridica: naturezaJuridica,
            SituacaoCadastral: situacaoCadastral,
        },
        SimplesNacional: {
            SituacaoSimplesNacional: situacaoSimplesNacional,
            SituacaoSIMEI: situacaoSIMEI,
            SimplesNacionalPeriodosAnteriores: simplesNacionalPeriodosAnteriores,
            SIMEIPeriodosAnteriores,
            DataConsulta: dataConsulta,
        },
        CadastroPJ: {
            Telefones: telefones,
            Enderecos: enderecos,
            Emails: emails,
            Socios: socios,
        },
    },
} = response;

This is the usage:

result.data = {
    cadastroPJ: {
        numeroInscricao,
        matriz,
        dataAbertura,
        nomeEmpresarial,
        nomeFantasia,
        naturezaJuridica,
        situacaoCadastral,
    },
    simplesNacional: {
        nomeEmpresarial,
        situacaoSimplesNacional,
        situacaoSIMEI,
        simplesNacionalPeriodosAnteriores,
        SIMEIPeriodosAnteriores,
        dataConsulta,
    },
    telefones: telefones.map((x) => ({
        numero: x.TelefoneComDDD,
    })),
    enderecos: enderecos.map((x) => ({
        logradouro: x.Logradouro,
        numero: x.Numero,
        bairro: x.Bairro,
        cidade: x.Cidade,
        uf: x.UF,
        cep: x.CEP,
    })),
    emails: emails.map((x) => ({
        endereco: x.EnderecoEmail,
    })),
    socios: socios.map((x) => ({
        documento: x.Documento,
        nome: x.Nome,
        percentualParticipacao: x.PercentualParticipacao,
        dataEntrada: x.DataEntrada,
    })),
};

Visual Studio Code terminal says:

Cannot destructure property SituacaoSimplesNacional of undefined or null.

because the property SimplesNacional is null.

Did you mean "response" is the "result" in second snippet? also can you check if this answers your question? https://stackoverflow.com/questions/59425002/how-to-properly-destructure-variable-if-it-can-be-absent-inside-property/59425726#59425726 — Siva K V, Dec 30 '19 at 16:52
Yep, result is the response properties treated to a new object. — innis, Dec 30 '19 at 16:54
Is the property there with a null value, or omitted completely? The solution is different for the two cases. — Barmar, Dec 30 '19 at 17:07
Your destructuring pattern is very different from the object. There's no `CadastroPJ` property in the `result.data` object. There's no `Retorno` property, either. — Barmar, Dec 30 '19 at 17:12

Eliseo · Accepted Answer · 2019-12-31T19:08:36.713

const {
  Retorno: {
    ReceitaPJ: {
      NumeroInscricao: numeroInscricao,
      Matriz: matriz,
      DataAbertura: dataAbertura,
      NomeEmpresarial: nomeEmpresarial,
      NomeFantasia: nomeFantasia,
      NaturezaJuridica: naturezaJuridica,
      SituacaoCadastral: situacaoCadastral,
    },
    SimplesNacional,
    CadastroPJ: {
      Telefones: telefones,
      Enderecos: enderecos,
      Emails: emails,
      Socios: socios,
    },
  },
} = response

if (SimplesNacional) {
  var {
    SituacaoSimplesNacional: situacaoSimplesNacional,
    SituacaoSIMEI: situacaoSIMEI,
    SimplesNacionalPeriodosAnteriores: simplesNacionalPeriodosAnteriores,
    SIMEIPeriodosAnteriores,
    DataConsulta: dataConsulta,
  } = SimplesNacional
}

Just make it in two steps

EDIT: if you want use const...

const {
   SituacaoSimplesNacional: situacaoSimplesNacional,
   SituacaoSIMEI: situacaoSIMEI,
   SimplesNacionalPeriodosAnteriores: simplesNacionalPeriodosAnteriores,
   SIMEIPeriodosAnteriores,
   DataConsulta: dataConsulta,
 } = (SimplesNacional || {})

but anyway, deep in object will throw an error later...

This works, but it doesn't look right. I'm gonna use it like this because I'm short in time, but eventually I'm gonna sit down and make more research on this. Thanks — innis, Dec 30 '19 at 17:57
Keep it simple, prioritize maintainability, forget about tricks and quick solves, the next dev will be grateful <3 — Eliseo, Dec 31 '19 at 19:04

How to destructurate an object property that sometimes is received as null

1 Answers1