Question

I am trying to parse db-record data in to my haml-template file for filtering purposes.(isotope jquery)

House model

def features_to_html_class
  "#{(guests + bedrooms + type + amenities).map(&:name).join(' ')}"
end

House index haml view

- @houses.each do |house|
  .item{:class => house.features_to_html_class }

I get the error message undefined method `map’. The values from the db are integers (guests/bedrooms) and strings (type / amenities)

What am I doing wrong?

Answer 1

Are you getting that in the features_to_html_class? You might want to check for nil arrays. You can do that with compact easily.

def features_to_html_class
  (guests + bedrooms + type + amenities).compact.map(&:name).join(' ')
end