text: exports.up = function (knex, Promise) {
      return Promise.all([
          knex.schema.createTable('likes', function (table) {
              table.increments();
              table.integer('post_id').references('id').inTable('posts');
              table.integer('comment_id').references('id').inTable('comments');
              table.integer('user_id').references('id').inTable('users');
              table.timestamp('created_at');
          })
      ]);
  };
  
  exports.down = function (knex, Promise) {
  
  };
  