Methods
Instance Public methods
head(status, options = nil)
Returns a response that has no content (merely headers). The options argument is interpreted to be a hash of header names and values. This allows you to easily return a response that consists only of significant headers:
head :created, location: person_path(@person)
head :created, location: @person
It can also be used to return exceptional conditions:
return head(:method_not_allowed) unless request.post?
return head(:bad_request) unless valid_request?
render
See Rack::Utils::SYMBOL_TO_STATUS_CODE for a full list of valid status symbols.
📝 Source code
# File actionpack/lib/action_controller/metal/head.rb, line 21
def head(status, options = nil)
if status.is_a?(Hash)
raise ArgumentError, "#{status.inspect} is not a valid value for `status`."
end
status ||= :ok
if options
location = options.delete(:location)
content_type = options.delete(:content_type)
options.each do |key, value|
headers[key.to_s.split(/[-_]/).each { |v| v[0] = v[0].upcase }.join("-")] = value.to_s
end
end
self.status = status
self.location = url_for(location) if location
if include_content?(response_code)
unless self.media_type
self.content_type = content_type || ((f = formats) && Mime[f.first]) || Mime[:html]
end
response.charset = false
end
self.response_body = ""
true
end