如何在Rails网站上使用Ruby gem？

Question

I'm working on a Rails web site ( https://github.com/jhsu802701/dvi ) called Doppler Value Investing that uses my very first Ruby gem (dvi_scraper, source code at https://github.com/jhsu802701/dvi_scraper ). dvi_scraper downloads and processes financial statements from publicly traded companies, and dvi shows the results. The results are saved in a Postgres database and in a *.csv file.

I added dvi_scraper to the Gemfile for my Rails app, and I used "bundle install" to install it. However, the scripts and files from dvi_scraper DO NOT show up in the dvi directory where I'm working on my Rails site. Instead, they're all at /home/(my username)/.rvm/gems/ruby-2.0.0-p195/gems/dvi_scraper-0.0.0 . And the Dvi_scraper.dopeler command doesn't work in my dvi app.

What do I need to do to get the files from dvi_scraper to show up in my dvi app? As you might guess, I don't really understand how RubyGems and Gemfile work even though I've used them.

Answer 1

This is the expected behavior. The gem files are automatically included (typically) when added via the Gemfile.

From the console

rails console

Try running

require_or_load 'dvi_scraper'

This should return true if the gem is properly installed