From 40dbebba28bfa1c55737da7354542c3bdca4e1a1 Mon Sep 17 00:00:00 2001 From: Lawrence Pit Date: Mon, 14 Jul 2008 11:53:41 +1000 Subject: Allow deep merging of hash values for nested with_options. [#490 state:resolved] Signed-off-by: Pratik Naik --- activesupport/lib/active_support/core_ext/hash.rb | 3 ++- .../lib/active_support/core_ext/hash/deep_merge.rb | 23 ++++++++++++++++++++++ 2 files changed, 25 insertions(+), 1 deletion(-) create mode 100644 activesupport/lib/active_support/core_ext/hash/deep_merge.rb (limited to 'activesupport/lib/active_support/core_ext') diff --git a/activesupport/lib/active_support/core_ext/hash.rb b/activesupport/lib/active_support/core_ext/hash.rb index 6cbd9dd378..a6065ab48e 100644 --- a/activesupport/lib/active_support/core_ext/hash.rb +++ b/activesupport/lib/active_support/core_ext/hash.rb @@ -1,10 +1,11 @@ -%w(keys indifferent_access reverse_merge conversions diff slice except).each do |ext| +%w(keys indifferent_access deep_merge reverse_merge conversions diff slice except).each do |ext| require "active_support/core_ext/hash/#{ext}" end class Hash #:nodoc: include ActiveSupport::CoreExtensions::Hash::Keys include ActiveSupport::CoreExtensions::Hash::IndifferentAccess + include ActiveSupport::CoreExtensions::Hash::DeepMerge include ActiveSupport::CoreExtensions::Hash::ReverseMerge include ActiveSupport::CoreExtensions::Hash::Conversions include ActiveSupport::CoreExtensions::Hash::Diff diff --git a/activesupport/lib/active_support/core_ext/hash/deep_merge.rb b/activesupport/lib/active_support/core_ext/hash/deep_merge.rb new file mode 100644 index 0000000000..f8842ba57a --- /dev/null +++ b/activesupport/lib/active_support/core_ext/hash/deep_merge.rb @@ -0,0 +1,23 @@ +module ActiveSupport #:nodoc: + module CoreExtensions #:nodoc: + module Hash #:nodoc: + # Allows for deep merging + module DeepMerge + # Returns a new hash with +self+ and +other_hash+ merged recursively. + def deep_merge(other_hash) + self.merge(other_hash) do |key, oldval, newval| + oldval = oldval.to_hash if oldval.respond_to?(:to_hash) + newval = newval.to_hash if newval.respond_to?(:to_hash) + oldval.class.to_s == 'Hash' && newval.class.to_s == 'Hash' ? oldval.deep_merge(newval) : newval + end + end + + # Returns a new hash with +self+ and +other_hash+ merged recursively. + # Modifies the receiver in place. + def deep_merge!(other_hash) + replace(deep_merge(other_hash)) + end + end + end + end +end -- cgit v1.2.3