Module: Brainstem::Concerns::Lookup

Extended by:
ActiveSupport::Concern
Included in:
DSL::Association, DSL::Field
Defined in:
lib/brainstem/concerns/lookup.rb

Instance Method Summary collapse

Instance Method Details

#key_for_lookup ⇒ Object 



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# File 'lib/brainstem/concerns/lookup.rb', line 25

def key_for_lookup
  raise(StandardError 'Implement `key_for_lookup` when including Lookup Module.')
end

#run_on_with_lookup(model, context, helper_instance) ⇒ Object 



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# File 'lib/brainstem/concerns/lookup.rb', line 6

def run_on_with_lookup(model, context, helper_instance)
  context[:lookup][key_for_lookup][name] ||= begin
    proc = options[:lookup]
    lookup = helper_instance.instance_exec(context[:models], &proc)
    if !options[:lookup_fetch].present? && !lookup.respond_to?(:[])
      raise(StandardError, 'Brainstem expects the return result of the `lookup` to be a Hash since it must respond to [] in order to access the model\'s assocation(s). Default: lookup_fetch: lambda { |lookup, model| lookup[model.id] }`')
    end

    lookup
  end

  if options[:lookup_fetch]
    proc = options[:lookup_fetch]
    helper_instance.instance_exec(context[:lookup][key_for_lookup][name], model, &proc)
  else
    context[:lookup][key_for_lookup][name][model.id]
  end
end