Module: FriendlyId::Finders

Defined in:
lib/friendly_id/finders.rb

Overview

## Performing Finds with FriendlyId

FriendlyId offers enhanced finders which will search for your record by friendly id, and fall back to the numeric id if necessary. This makes it easy to add FriendlyId to an existing application with minimal code modification.

By default, these methods are available only on the ‘friendly` scope:

Restaurant.friendly.find('plaza-diner') #=> works
Restaurant.friendly.find(23)            #=> also works
Restaurant.find(23)                     #=> still works
Restaurant.find('plaza-diner')          #=> will not work

### Restoring FriendlyId 4.0-style finders

Prior to version 5.0, FriendlyId overrode the default finder methods to perform friendly finds all the time. This required modifying parts of Rails that did not have a public API, which was harder to maintain and at times caused compatiblity problems. In 5.0 we decided to change the library’s defaults and add the friendly finder methods only to the ‘friendly` scope in order to boost compatiblity. However, you can still opt-in to original functionality very easily by using the `:finders` addon:

class Restaurant < ActiveRecord::Base
  extend FriendlyId

  scope :active, -> {where(:active => true)}

  friendly_id :name, :use => [:slugged, :finders]
end

Restaurant.friendly.find('plaza-diner') #=> works
Restaurant.find('plaza-diner')          #=> now also works
Restaurant.active.find('plaza-diner')   #=> now also works

### Updating your application to use FriendlyId’s finders

Unless you’ve chosen to use the ‘:finders` addon, be sure to modify the finders in your controllers to use the `friendly` scope. For example:

# before
def set_restaurant
  @restaurant = Restaurant.find(params[:id])
end

# after
def set_restaurant
  @restaurant = Restaurant.friendly.find(params[:id])
end

#### Active Admin

Unless you use the ‘:finders` addon, you should modify your admin controllers for models that use FriendlyId with something similar to the following:

controller do
  def find_resource
    scoped_collection.friendly.find(params[:id])
  end
end

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Class Method Details

.setup(model_class) ⇒ Object 



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# File 'lib/friendly_id/finders.rb', line 76

def self.setup(model_class)
  model_class.instance_eval do
    relation.class.send(:include, friendly_id_config.finder_methods)
    if (ActiveRecord::VERSION::MAJOR == 4 && ActiveRecord::VERSION::MINOR == 2) || ActiveRecord::VERSION::MAJOR >= 5
      model_class.send(:extend, friendly_id_config.finder_methods)
    end
  end

  # Support for friendly finds on associations for Rails 4.0.1 and above.
  if ::ActiveRecord.const_defined?("AssociationRelation")
    model_class.extend(ClassMethods)
    association_relation_delegate_class = model_class.relation_delegate_class(::ActiveRecord::AssociationRelation)
    association_relation_delegate_class.send(:include, model_class.friendly_id_config.finder_methods)
  end
end