text: 
  exports.up = function(knex, Promise) {
    return knex.schema.createTable('books', function(tbl) {
          tbl.increments()
  
          tbl.string('title', 128)
              .notNullable()
          
          tbl.string('author', 128)
              .notNullable()
  
          tbl.string('publisher', 128)
              .notNullable()
  
          tbl.integer('rating')
  
          tbl.string('description', 256)
  
          tbl.string('image', 128)
  
          tbl.integer('price')
  
          tbl.timestamps(true, true)
    })
  };
  
  exports.down = function(knex, Promise) {
    return knex.schema.dropTableIfExists('books')
  };
  