siimee/backend/db/seeds/01-users.js

const mock = require('../mock')
const fs = require('fs')

let users = []
const generatedDataPath = './db/generated'
let fileNames = fs.readdirSync(generatedDataPath)
for (let name of fileNames) {
    const data = require(`../generated/${name}`)
    users = [...users, ...data.users]
}

exports.seed = knex => {
    // Deletes ALL existing entries
    return knex('users')
        .truncate()
        .then(function () {
            // Inserts seed entries
            return users
                ? knex('users').insert(users)
                : knex('users').insert(mock.users)
        })
}