app/helpers/partials_helper.rb
module PartialsHelper
def partial_for_class_in_view_path(klass, view_path, prefix = nil, suffix = nil)
return nil if klass.nil?
name = [prefix, klass.name.underscore, suffix].compact.map(&:to_s).join("_")
search_name = String.new(name)
if search_name.include?("/")
search_name.gsub!(/(\/)([^\/]*)$/, '\1_\2')
name = File.join(params[:controller], name) if defined?(params) && params[:controller]
else
search_name = "_" + search_name
end
path = defined?(params) && params[:controller] ? File.join(view_path, params[:controller], search_name + ".html.erb") : File.join(view_path, search_name + ".html.erb")
return name if File.exists?(File.join(path))
partial_for_class_in_view_path(klass.superclass, view_path, prefix, suffix)
end
def partial_for_class(klass, prefix = nil, suffix = nil)
raise ArgumentError, "No partial for object. Is there a partial for any class in the inheritance hierarchy?" if klass.nil?
name = klass.name.underscore
controller.view_paths.each do |view_path|
partial = partial_for_class_in_view_path(klass, view_path, prefix, suffix)
return partial if partial
end
raise ArgumentError, "No partial for object. Is there a partial for any class in the inheritance hierarchy?"
end
def partial_for_class(klass, prefix = nil, suffix = nil)
raise ArgumentError, "No partial for object. Is there a partial for any class in the inheritance hierarchy?" if klass.nil?
name = klass.name.underscore
controller.view_paths.each do |view_path|
partial = partial_for_class_in_view_path(klass, view_path, prefix, suffix)
return partial if partial
end
raise ArgumentError, "No partial for object. Is there a partial for any class in the inheritance hierarchy?"
end
##
# Calculate partial name with prefix and suffix
# Together with render_partial_for_class,
# it should replace #partial_for_class_in_view_path in the future
#
def partial_name_for(underscore, prefix = nil, suffix = nil)
parts = underscore.split "/"
if prefix || suffix
partial = [prefix, parts.last, suffix].compact.map(&:to_s).join "_"
else
partial = parts.last
end
if parts.size > 1
"#{params[:controller]}/#{parts.first}/#{partial}"
else
partial
end
end
def render_for_class(klass, *args, &block)
raise ArgumentError, "No partial for object. Is there a partial for any class in the inheritance hierarchy?" unless klass
begin
capture klass, &block
rescue ActionView::MissingTemplate
render_for_class klass.superclass, *args, &block
end
end
def render_partial_for_class(klass, *args)
render_for_class klass do |klass|
render partial_name_for(klass.name.underscore), *args
end
end
end