Mongoose未为子文档生成_id

Question

我有一个简单的模式，里面有一个数组。当我创建一个包含映射数组中的项的新项时，映射数组中的项会自动分配_ID。但是，当我试图将项添加到现有项的映射数组时，新的映射是用null的_id创建的。我如何让mongoose为我生成这个_ID？我在文件里找不到。

  {
    email: {
      type: String,
      required: true,
      index: true,
    },
    mapping: [
      {
        mapToField: {
          type: String,
          enum: [
            "subject",
            "location",
            "company",
            "hours",
            "rate",
            "startDate",
            "endDate",
          ],
          required: true,
        },
        mapToLabel: {
          type: String,
          required: true,
        },
        regex: {
          type: String,
          required: true,
        },
      },
    ],
  },
  { timestamps: true }
);

    let item = await Mappings.findOne({ _id: id });
    return await item.mapping.create(mapping);

    return await Mappings.update(
      { _id: id },
      { $push: { mapping } },
      { upsert: true }
    );

Answer 1

尝试将映射定义为用户架构文件中的架构。

const mappingSchema = new mongoose.Schema({
        mapToField: {
          type: String,
          enum: [
            "subject",
            "location",
            "company",
            "hours",
            "rate",
            "startDate",
            "endDate",
          ],
          required: true,
        },
        mapToLabel: {
          type: String,
          required: true,
        },
        regex: {
          type: String,
          required: true,
        }
})

然后您的主模式变成

{
  email: {
    type: String,
    required: true,
    index: true
  },
  mappings: [mappingSchema]
}