为什么我的导轨不运行？

Question

When I run $ rails -server to start a server, there comes an error:

Could not find gem 'sqlite3' in any of the gem sources listed in your Gemfile or available on this machine.

Does that mean I did not install sqlite3 ? How can I resolve the issue?

Answer 1

First, you have to install all Gems from your Gemfile .

This can be done with bundle install or in short bundle .

If this command executed successfully, you can run your server with rails s .

But I think it's better for you, to start with a tutorial .

Answer 2

server and s are not a switch, but a sub-command.

Run

$ rails server

or

$ rails s

Answer 3

I run into this issue previously， that is because you run bundle install, miss some gems, so you can $ bundle install again,

and you can test the sqlite if is installed:

$ sqlite3 --version

If successed, you can test the rails server .