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Silently attempt to fetch non-existent hash value #494

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2 changes: 1 addition & 1 deletion lib/jbuilder.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -254,7 +254,7 @@ def target!
private

def _extract_hash_values(object, attributes)
attributes.each{ |key| _set_value key, object.fetch(key) }
attributes.each{ |key| _set_value key, object.fetch(key, BLANK) }
end

def _extract_method_values(object, attributes)
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28 changes: 28 additions & 0 deletions test/jbuilder_test.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -450,6 +450,34 @@ class JbuilderTest < ActiveSupport::TestCase
assert_equal 2, result.second['id']
end

test 'extract hash keys directly from array' do
comments = [ { content: 'hello', id: 1 }, { content: 'world', id: 2 } ]

result = jbuild do |json|
json.array! comments, :content, :id
end

assert_equal 'hello', result.first['content']
assert_equal 1, result.first['id']
assert_equal 'world', result.second['content']
assert_equal 2, result.second['id']
end

test 'missing hash keys ' do
comments = [ { content: 'hello', id: 1, meta: 'meta' }, { content: 'world', id: 2 } ]

result = jbuild do |json|
json.array! comments, :content, :id, :meta
end

assert_equal 'hello', result.first['content']
assert_equal 1, result.first['id']
assert_equal 'meta', result.first['meta']
assert_equal 'world', result.second['content']
assert_equal 2, result.second['id']
assert_nil result.second['meta']
end

test 'empty top-level array' do
comments = []

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