Method: Hash#to_query

Defined in:
activesupport/lib/active_support/core_ext/object/to_query.rb

#to_query(namespace = nil) ⇒ Object Also known as: to_param

Returns a string representation of the receiver suitable for use as a URL query string:

{name: 'David', nationality: 'Danish'}.to_query
# => "name=David&nationality=Danish"

An optional namespace can be passed to enclose key names:

{name: 'David', nationality: 'Danish'}.to_query('user')
# => "user%5Bname%5D=David&user%5Bnationality%5D=Danish"

The string pairs “key=value” that conform the query string are sorted lexicographically in ascending order.



75
76
77
78
79
80
81
82
83
84
 
# File 'activesupport/lib/active_support/core_ext/object/to_query.rb', line 75

def to_query(namespace = nil)
  query = filter_map do |key, value|
    unless (value.is_a?(Hash) || value.is_a?(Array)) && value.empty?
      value.to_query(namespace ? "#{namespace}[#{key}]" : key)
    end
  end

  query.sort! unless namespace.to_s.include?("[]")
  query.join("&")
end