为模型\"Proposal\“的路径\"_id\”处的值\"{ proposser：'618e49a68e18cd48286de4b5‘}\“(类型对象)强制转换为ObjectId失败

Question

我在graphql游乐场中遇到了这个错误(下图)。我也检查了解析器中objectId的有效性。

// model

 const ProposalSchema = new Schema({
      cover
    Letter: {
        type: String,
      },
      budget: {
        type: String,
      },
      proposals: {
        type: mongoose.Schema.Types.ObjectId,
      },
      _id: {
        type: mongoose.Schema.Types.ObjectId,
      },
    });

//解析器还使用mongoose.isValidObjectId(proposser)检查参数是否有效，它返回true

Query: {
    proposals(_, args) {
      const { proposser } = args;
      return Proposal.findById({
        proposser,
      });
    },
  },

// schema

const typeDefs = gql`
  type Proposal {
    _id: ID!
    coverLetter: String
    budget: String
    proposser: ID!
  }
`;

const Proposal = mongoose.model("Proposal", ProposalSchema);

​

​

Answer 1

我在解析器中使用了错误的方法。findById用于字段非Id字段。

 async proposals(_, args) {
  const { proposser } = args;
  const userProposals = await Proposal.find({
    proposser,
  });

  try {
    const result = userProposals;
    return result ? result : [];
  } catch (err) {
    console.log(err);
  }
},