Ruby-on-rails – Bundle error in Ruby on rails

ruby-on-rails

i ran bundle inside a ror project which resulted in following error.

I am unable to understand what is missing.

[root@kracekumar canvas-lms]# bundle
Fetching source index for http://rubygems.org/
Using rake (0.8.7) 
Using abstract (1.0.0) 
Installing activesupport (2.3.11) 
Using rack (1.1.0) 
Installing actionpack (2.3.11) 
Installing actionmailer (2.3.11) 
Installing activerecord (2.3.11) 
Installing activeresource (2.3.11) 
Installing authlogic (2.1.3) 
Using builder (2.1.2) 
Using mime-types (1.16) 
Installing xml-simple (1.0.12) 
Installing aws-s3 (0.6.2) 
Installing bluecloth (2.0.10) with native extensions 
/usr/lib/ruby/site_ruby/1.8/rubygems/installer.rb:481:in `build_extensions': ERROR: Failed to build gem native extension. (Gem::Installer::ExtensionBuildError)

/usr/bin/ruby extconf.rb 
mkmf.rb can't find header files for ruby at /usr/lib/ruby/ruby.h


Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/bluecloth-2.0.10 for inspection.
Results logged to /usr/lib/ruby/gems/1.8/gems/bluecloth-2.0.10/ext/gem_make.out
    from /usr/lib/ruby/site_ruby/1.8/rubygems/installer.rb:446:in `each'
    from /usr/lib/ruby/site_ruby/1.8/rubygems/installer.rb:446:in `build_extensions'
    from /usr/lib/ruby/site_ruby/1.8/rubygems/installer.rb:198:in `install'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/source.rb:96:in `install'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/installer.rb:55:in `run'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/spec_set.rb:12:in `each'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/spec_set.rb:12:in `each'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/installer.rb:44:in `run'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/installer.rb:8:in `install'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/cli.rb:226:in `install'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor/task.rb:22:in `send'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor/task.rb:22:in `run'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor/invocation.rb:118:in `invoke_task'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor.rb:246:in `dispatch'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/lib/bundler/vendor/thor/base.rb:389:in `start'
    from /usr/lib/ruby/gems/1.8/gems/bundler-1.0.10/bin/bundle:13
    from /usr/bin/bundle:19:in `load'
    from /usr/bin/bundle:19
[root@kracekumar canvas-lms]#

Best Answer

For Red Hat systems, you can install the pre-requisites like this:

sudo yum -y install make gcc ruby-devel

and it should correctly install the dependencies you need for a native gem install.

This assumes you have Gems already installed, if not, install that as well:

sudo yum -y install rubygems

(Tested on an Amazon EC2 instance, which uses yum.)

Related Solutions

Ruby-on-rails – Rails: How to rename a database column in a Ruby on Rails migration

rename_column :table, :old_column, :new_column

You'll probably want to create a separate migration to do this. (Rename FixColumnName as you will.):

script/generate migration FixColumnName
# creates  db/migrate/xxxxxxxxxx_fix_column_name.rb

Then edit the migration to do your will:

# db/migrate/xxxxxxxxxx_fix_column_name.rb
class FixColumnName < ActiveRecord::Migration
  def self.up
    rename_column :table_name, :old_column, :new_column
  end

  def self.down
    # rename back if you need or do something else or do nothing
  end
end

For Rails 3.1 use:

While, the up and down methods still apply, Rails 3.1 receives a change method that "knows how to migrate your database and reverse it when the migration is rolled back without the need to write a separate down method".

See "Active Record Migrations" for more information.

rails g migration FixColumnName

class FixColumnName < ActiveRecord::Migration
  def change
    rename_column :table_name, :old_column, :new_column
  end
end

If you happen to have a whole bunch of columns to rename, or something that would have required repeating the table name over and over again:

rename_column :table_name, :old_column1, :new_column1
rename_column :table_name, :old_column2, :new_column2
...

You could use change_table to keep things a little neater:

class FixColumnNames < ActiveRecord::Migration
  def change
    change_table :table_name do |t|
      t.rename :old_column1, :new_column1
      t.rename :old_column2, :new_column2
      ...
    end
  end
end

Then just db:migrate as usual or however you go about your business.

For Rails 4:

While creating a Migration for renaming a column, Rails 4 generates a change method instead of up and down as mentioned in the above section. The generated change method is:

$ > rails g migration ChangeColumnName

which will create a migration file similar to:

class ChangeColumnName < ActiveRecord::Migration
  def change
    rename_column :table_name, :old_column, :new_column
  end
end

Javascript – Rails: Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

If you're on Ubuntu, install nodejs

sudo apt-get install nodejs

Best Answer

Related Solutions

Ruby-on-rails – Rails: How to rename a database column in a Ruby on Rails migration

Javascript – Rails: Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

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