Class: JSON::MergePatch

Inherits:
Object
  • Object
show all
Defined in:
lib/json/merge_patch.rb,
lib/json/merge_patch/railtie.rb,
lib/json/merge_patch/version.rb

Overview

This class represents a merge patch.

Defined Under Namespace

Classes: Railtie

Constant Summary collapse

VERSION =

The current version of json-merge_patch

"1.1.0"

Instance Method Summary collapse

Constructor Details

#initialize(orig, patch) ⇒ MergePatch

Sets up a MergePatch.

Parameters:

  • orig (Object) —

    the original document

  • patch (Object) —

    the patch document



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# File 'lib/json/merge_patch.rb', line 30

def initialize(orig, patch)
  @orig = orig
  @patch = patch
end

Instance Method Details

#call ⇒ Object

Applies the patch the original object.

Returns:

  • (Object) —

    the document after applying the patch.



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# File 'lib/json/merge_patch.rb', line 38

def call
  if @patch.nil?
    return @orig
  elsif @patch.kind_of?(Array) || @orig.kind_of?(Array)
    @orig = purge_nils(@patch)
  elsif is_primitive?(@patch) || is_primitive?(@orig)
    @orig = @patch
  elsif @patch.kind_of?(Hash)
    @patch.each_key do |m|
      if @orig.has_key?(m)
        if @patch[m].nil?
          @orig.delete(m)
        else
          if is_primitive?(@patch[m])
            @orig[m] = @patch[m]
          else
            if @orig[m].kind_of?(Array)
              @orig[m] = purge_nils(@patch[m])
            else
              @orig[m] = self.class.new(@orig[m], @patch[m]).call
            end
          end
        end
      elsif !(@patch[m].nil?)
        @orig[m] = purge_nils(@patch[m])
      end
    end
  end
  @orig
end