Module: ForSelect::ClassMethods

Defined in:
lib/rails/for_select.rb

Instance Method Summary collapse

Instance Method Details

#for_select(id: :id, name: :name, cache_key: :updated_at) ⇒ Object

Allow to call #for_select on each class inheriting from ActiveRecord::Base. Will generate a tuples array for use in Rails’ form’s select fields. It will cache the resulting tuples array.

GameSystem.for_select # => [["name", 1], ["other name", 2], ...]

For those models that doesn’t defaultly have a name, or that should use another id field, you can customize it like this.

GameSystem.for_select(id: :uuid) # => [["name", 'uuid1'], ["other name", 'uuid2'], ...]
GameSystem.for_select(name: :full_name) # => [["full name", 1], ["other full name", 2], ...]

If you’re records doesn’t have timestamps you can use another cache key.

GameSystem.for_select(cache_key: :created_on) # => [["name", 1], ["other name", 2], ...]



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# File 'lib/rails/for_select.rb', line 19

def for_select(id: :id, name: :name, cache_key: :updated_at)
  Rails.cache.fetch [self.to_s.tableize, :select, self.maximum(cache_key)] do
    find_each.collect do |record|
      [
        record.send(name),
        record.send(id),
      ]
    end
  end
end