How do I suppress empty arrays from json created using jbuilder

Question

I have the following ruby code in _schema.json.jbuilder

json.member_of @dispenser.organizations do |organization|
  json.set! "@type", "Organization"
  json.name organization.name
end

The problem is in the generated json when a dispenser has no organizations:

"memberOf":[]

Can jbuilder handle this (using a configuration setting), or should I just wrap the whole thing in a conditional like if @dispenser.organizations.present?

Answer 1

You ought to be able to set:

json.ignore_nil!

And on arrays, use:

member_of.presence

An empty array should be converted to nil, and then ignored.