db.js

const mongoose=require("mongoose")
const Schema=mongoose.Schema;
const ObjectId=mongoose.Types.ObjectId
const userSchema=new Schema({
    email:{type:String,unique:true},
    password:String,
    firstName:String,
    lastName:String
})
const adminSchema=new Schema({
    email:{type:String,unique:true},
    password:String,
    firstName:String,
    lastName:String
})
const courseSchema=new Schema({
    title:String,
    description:String,
    price:Number,
    imageUrl:String,
    creatorId:ObjectId
})
const purchaseSchema=new Schema({
    userId:ObjectId,
    courseId:ObjectId   
}) 
const userModel=mongoose.model("user",userSchema);
const adminModel=mongoose.model("admin",adminSchema);
const courseModel=mongoose.model("course",courseSchema);
const purchaseModel=mongoose.model("purchase",purchaseSchema);
module.exports={
    userModel,
    adminModel,
    courseModel,
    purchaseModel
}