const mongoose = require('mongoose') function catalog(pdf) { if (pdf) return '/uploads/pdf/' + pdf } const MainCatalogSchema = mongoose.Schema({ file: { fa: {type: String, get: catalog}, en: {type: String, get: catalog} }, created_at: String, updated_at: String }, { toObject: {getters: true}, toJSON: {getters: true} }) module.exports = mongoose.model('MainCatalog', MainCatalogSchema)