diff options
| -rw-r--r-- | activesupport/lib/active_support/core_ext/hash/keys.rb | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/hash/keys.rb b/activesupport/lib/active_support/core_ext/hash/keys.rb index 3c8a59f00a..a9169cf4a5 100644 --- a/activesupport/lib/active_support/core_ext/hash/keys.rb +++ b/activesupport/lib/active_support/core_ext/hash/keys.rb @@ -43,6 +43,13 @@ module ActiveSupport #:nodoc: alias_method :to_options, :symbolize_keys alias_method :to_options!, :symbolize_keys! + # Validate all keys in a hash match *valid keys, raising ArgumentError on a mismatch. + # Note that keys are NOT treated indifferently, meaning if you use strings for keys but assert symbol + # as keys, this will fail. + # examples: + # { :name => "Rob", :years => "28" }.assert_valid_keys(:name, :age) # => raises "ArgumentError: Unknown key(s): years" + # { :name => "Rob", :age => "28" }.assert_valid_keys("name", "age") # => raises "ArgumentError: Unknown key(s): years, name" + # { :name => "Rob", :age => "28" }.assert_valid_keys(:name, :age) # => passes, raises nothing def assert_valid_keys(*valid_keys) unknown_keys = keys - [valid_keys].flatten raise(ArgumentError, "Unknown key(s): #{unknown_keys.join(", ")}") unless unknown_keys.empty? |