How do I fetch specific data when I select an option? MERN Stack-CodePudding

I want to make a MERN application for car sales. Every car has its own brand and model. I want that when I select a brand, for example BMW, to get BMW models such as X3, X6, Serie 3 ... When I select Audi, the model should be A6, A5, Audi 80 ... How to do it? How do you make a mongoose model for something like that? Can anyone give me an idea how to do something like that. Nothing comes to mind at the moment.

CodePudding user response：

you need to put models under cars in your MongoDb document like below, check below Mongo collection structure.

{
  "_id": {
    "$oid": "6227f6861b3a9764567e8eb3"
  },"cars":[{
    "name": "BWM",
    "Model": ["x1","x2","x3"]
   }]
}

CodePudding user response：

might be this Help you. by creating two different schema models.for better data management.

const mongoose = require("mongoose");

const schema = new mongoose.Schema(
  {
    name: {
      type: String,
      index: true
    },
    company: {
      type: mongoose.Schema.Types.ObjectId,
      ref: 'company',
      index: true
    },
    type: {
      type: String,
      index: true
    },
    launchDate: {
      type: Date
    },
    variant: {
      type: String
    }
  },
  {
    versionKey: false,
    timestamps: true,
  }
);

module.exports = mongoose.model("models", schema);

const company = new mongoose.Schema(
  {
    name: {
      type: String,
      index: true
    }
  },
  {
    versionKey: false,
    timestamps: true,
  }
);

module.exports = mongoose.model("company", company);