I am trying to use this gem in my rails application, but when I add it to my gem file and try to use it I get an error saying that it did not found the methods required (I am using it inside a controller). Also require 'bn4r' does not help as rails tells me that it cannot load such a file, which is odd. I can access the library from the development console with no problems any idea as to why this happens?
After adding the gem to the Gemfile:
gem 'bn4r'
install it:
$ bundle install
Restart the server and use it like this:
BayesNet.new
Related
I'm new to Rails and I got a problem.
My new project requires rb-grib gem (link to ruby gems: https://rubygems.org/gems/rb-grib/versions/0.2.2). This gem requires GRIB API library, I installed it using brew install grib-api. It works in irb and .rb scripts. I need to use it in my Rails app, but I get an error LoadError: cannot load such file -- numru/grib. What I need to do to make it work and deploy to Heroku in future?
You need to add
require 'numru/grib'
I am still new to development using Rails, and have followed various tutorials. I want to create a simple application using the Ordrin API. I have been stuck at a minute problem for a long time.
Using the Ordrin API makes use of the line:
require 'ordrin'
However, the view related to the controller this occurs in shows the following error.
cannot load such file -- ordrin
Even though I have installed the gem earlier using
gem install ordrin
I have tried using the complete path for the gem returned by the command
gem which ordrin
But then I get an error cannot load such file -- json-schema, which is apparently a dependancy for ordrin.
How do I make the require statement load the default gem as managed by RubyGems?
add the following line in your gem file and try
gem 'ordrin'
and don't forget to run the following command
bundle install
I've added awesome_print to my ~/.irbrc file like so:
require 'ap'
Inside a Rails project directory, if I run irb it loads the gem fine, because I've already installed the gem locally. But if I run rails console, it spits out this error:
cannot load such file -- ap
How can I resolve this? I am guessing that it's looking for the gem in the app's Gemfile, but I don't want to add it to the Gemfile because I don't want other developers requiring that dependency. I only want to use awesome_print on my machine.
I am also using rbenv, if that is of any help.
There is this trick.
What you need to do is
# Copy the definition of the debundle! method into your ~/.irbrc
# Call 'debundle!' from IRB when you need to.
(as explained at the top of the file)
The text as it appears on the referred to site:
debundle.rb allows you to require gems that are not in your Gemfile when inspecting
programs that are run with Bundler.
Use at your own risk!
Paste the code of debundle.rb and you are done! A good place would be your .irbrc file
before requiring irbtools.
The code is directly taken from pry-debundle.
Please look there for any further information. This repo exists to simplify debundling
without using the pry repl.
In Rails -
Where should I locate Gems? I downloaded bootstrap and it's working, as well as a sample Rails app, separately, but I want them to work together. There is a bootstrapped rails gem (http://rubygems.org/gems/bootstrapped-rails) which I downloaded, but I'm unsure as to where I should locate it. Under models?
And how do I make sure I am referring to it? I need to add something in controller as well?
Again, more an answer to the question in the title than to what was intended by the questioner but you can use
bundle show <gemname>
To locate the directory where a gem is installed.
As Dfr mentioned: https://github.com/seyhunak/twitter-bootstrap-rails
Twitter bootstrap isn't anything more than (mostly) a collection of css/js/image files.
Add this to your gemfile
gem "twitter-bootstrap-rails"
run
bundle install
run for simple css
rails generate bootstrap:install static
It should place relevant js and css files into your application.js and application.css files accordingly. (Read more about asset pipeline)
To get you started, in the gem's link under section - "Generating layouts and views", you can see rake tasks to generate sample layouts.
e.g.
rails g bootstrap:layout application fixed
You should now have a twitter-bootstraped application.html.erb file under views/layouts.
To answer the question in the title, you can locate your gems by running gem env in the console. That will give you the specific information about your "RubyGems Environment:" When you run gem install some_gem_name it will add this gem to your system.
However, what it sounds like your trying to do is add a gem to your app. If this is the case you add gems to a rails application's Gemfile.
So using your example, you'd locate your Gemfile and add the following:
gem "bootstrapped-rails", "~> 2.0.8.5"
Once that's done, you run bundle install in your terminal.
I find that a good resource for basic rails information can be found here: http://guides.rubyonrails.org/getting_started.html
The tutorial is short and it will give you a great starting point.
I feel like this should be an easy answer but I'm totally stumped.
I've added mimetype_fu to my gemfile and it installed it when I ran bundle install. When I try to use File.mime_type? in my application I get an error:
NoMethodError: undefined method `mime_type?' for File:Class
In the rails console when I run
gem 'mimetype-fu'
it returns true
I'm on windows, if that matters
Any ideas?
If you are using Bundler, you can also just add require to the gem line like this.
gem 'mimetype-fu', :require => 'mimetype_fu'
You may need to manually require it inside your rails app. You can do this by adding an file to config/initializers/ if you want it to be available globally.
EDIT | Also, you did restart the rails server, right? ;)