Module: ActiveAdmin::Dependency

Defined in:
lib/active_admin/dependency.rb

Defined Under Namespace

Modules: Requirements Classes: Matcher

Class Method Summary collapse

Class Method Details

.[](name) ⇒ Object 



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# File 'lib/active_admin/dependency.rb', line 54

def self.[](name)
  Matcher.new name.to_s
end

.method_missing(name, *args) ⇒ Object

Provides a clean interface to check for gem dependencies at runtime.

ActiveAdmin::Dependency.draper

> #<ActiveAdmin::Dependency::Matcher for draper 1.2.1>

ActiveAdmin::Dependency.draper?

> true

ActiveAdmin::Dependency.draper? '>= 1.5.0'

> false

ActiveAdmin::Dependency.draper? '= 1.2.1'

> true

ActiveAdmin::Dependency.draper? '~> 1.2.0'

> true

ActiveAdmin::Dependency.rails? '>= 4.2.7', '<= 5.0.2'

> true

ActiveAdmin::Dependency.rails! '5' -> ActiveAdmin::DependencyError: You provided rails 4.2.7 but we need: 5.

ActiveAdmin::Dependency.devise! -> ActiveAdmin::DependencyError: To use devise you need to specify it in your Gemfile.

All but the pessimistic operator (~>) can also be run using Ruby's comparison syntax.

ActiveAdmin::Dependency.rails >= '4.2.7'

> true

Which is especially useful if you're looking up a gem with dashes in the name.

ActiveAdmin::Dependency < 5

> false



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# File 'lib/active_admin/dependency.rb', line 44

def self.method_missing(name, *args)
  if name[-1] == '?'
    Matcher.new(name[0..-2]).match? args
  elsif name[-1] == '!'
    Matcher.new(name[0..-2]).match! args
  else
    Matcher.new name.to_s
  end
end