Froze rails gems

[depot.git] / vendor / rails / activesupport / lib / active_support / json / encoders / hash.rb

diff --git a/vendor/rails/activesupport/lib/active_support/json/encoders/hash.rb b/vendor/rails/activesupport/lib/active_support/json/encoders/hash.rb
new file mode 100644 (file)
index 0000000..b9bdd55
--- /dev/null
+++ b/vendor/rails/activesupport/lib/active_support/json/encoders/hash.rb
@@ -0,0 +1,47 @@
+class Hash
+  # Returns a JSON string representing the hash.
+  #
+  # Without any +options+, the returned JSON string will include all
+  # the hash keys. For example:
+  #
+  #   { :name => "Konata Izumi", 'age' => 16, 1 => 2 }.to_json
+  #   # => {"name": "Konata Izumi", 1: 2, "age": 16}
+  #
+  # The keys in the JSON string are unordered due to the nature of hashes.
+  #
+  # The <tt>:only</tt> and <tt>:except</tt> options can be used to limit the
+  # attributes included, and will accept 1 or more hash keys to include/exclude.
+  #
+  #   { :name => "Konata Izumi", 'age' => 16, 1 => 2 }.to_json(:only => [:name, 'age'])
+  #   # => {"name": "Konata Izumi", "age": 16}
+  #
+  #   { :name => "Konata Izumi", 'age' => 16, 1 => 2 }.to_json(:except => 1)
+  #   # => {"name": "Konata Izumi", "age": 16}
+  #
+  # The +options+ also filter down to any hash values. This is particularly
+  # useful for converting hashes containing ActiveRecord objects or any object
+  # that responds to options in their <tt>to_json</tt> method. For example:
+  #
+  #   users = User.find(:all)
+  #   { :users => users, :count => users.size }.to_json(:include => :posts)
+  #
+  # would pass the <tt>:include => :posts</tt> option to <tt>users</tt>,
+  # allowing the posts association in the User model to be converted to JSON
+  # as well.
+  def to_json(options = {}) #:nodoc:
+    hash_keys = self.keys
+
+    if options[:except]
+      hash_keys = hash_keys - Array(options[:except])
+    elsif options[:only]
+      hash_keys = hash_keys & Array(options[:only])
+    end
+
+    returning result = '{' do
+      result << hash_keys.map do |key|
+        "#{ActiveSupport::JSON.encode(key)}: #{ActiveSupport::JSON.encode(self[key], options)}"
+      end * ', '
+      result << '}'
+    end
+  end
+end