mongoose hasMany plugin

hasMany.js

//dbPlugins.js
import mongoose from 'mongoose'
export const hasMany = (schema, options) => {
  for (const [className, finder] of Object.entries(options)) {
    const plural = schema.base._pluralize(className)

    schema.methods[plural] = function (cb) {
      for (const [k, v] of Object.entries(finder)) {
        finder[k] = v.toString()[0] === '$' ? this.get(v.replace('$', '')) : v
      }

      return mongoose.model(className).find(finder, cb)
    }
  }
}




// model.js
import { hasMany } from '../utils/dbPlugins'



modelSchema.plugin(hasMany, {
  Coverage: { policy: '$_id' },
  Document: { className: 'Policy', classId: '$_id' },
})