Question

I want to use redis with sinatra,and followed the guide like this

require "redis"

redis = Redis.new

then, I got the error

LoadError: no such file to load -- redis

maybe the lib of redis is not loading.

I git the redis-rb from github and copy the lib of redis into my sinatra app.

How can I install the redis-rb? I google something like that:

rake redis:install

Answer 1

Have you included redis in your “Gemfile”? It should be in your application root.

I git the redis-rb from github and copy the lib of redis into my
sinatra app.

Why? It is more convenient to install redis via bundler. (Redis is available as a Ruby gem).

I’m sure you can find proper introductions to bunler via your favourite search engine, but let me show you an example “Gemfile” to use with bundler anyway:

source :rubygems

gem "bundler"
gem "sinatra"
gem "rack"
gem "redis"

When you run bundler, redis should be ready to go with your configuration.