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Add option to ignore property if instance is nil. #76

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Add option to ignore property if instance is nil. #76

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2 changes: 2 additions & 0 deletions lib/representable/deserializer.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,8 @@ def call(fragment)
@object = @binding.create_object(fragment)
end

return if @binding.options[:ignore_nil_instance] && @object == fragment

# DISCUSS: what parts should be in this class, what in Binding?
representable = prepare(@object)
deserialize(representable, fragment, @binding.user_options)
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11 changes: 11 additions & 0 deletions test/representable_test.rb
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Expand Up @@ -618,6 +618,17 @@ def compute_representer(name)
song.name.must_equal obj
song.name.must_be_kind_of mod
end

describe "with :ignore_nil_instance set and the instance being nil" do
representer! do
property :name, :extend => mod, :instance => lambda { |*| nil }, :ignore_nil_instance => true
end

it "does not evaluate the property" do
song = Song.new.extend(representer).from_hash("name" => "Eric's Had A Bad Day")
song.name.must_be_nil
end
end
end

describe "property with :extend" do
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