method

assert_valid_keys

v3.2.3 - Show latest stable - 0 notes - Class: Hash

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What's this?

assert_valid_keys(*valid_keys) public

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 symbols as keys, this will fail.

Examples

{ :name => "Rob", :years => "28" }.assert_valid_keys(:name, :age) # => raises "ArgumentError: Unknown key: years"
{ :name => "Rob", :age => "28" }.assert_valid_keys("name", "age") # => raises "ArgumentError: Unknown key: name"
{ :name => "Rob", :age => "28" }.assert_valid_keys(:name, :age) # => passes, raises nothing

Show source

# File activesupport/lib/active_support/core_ext/hash/keys.rb, line 41
  def assert_valid_keys(*valid_keys)
    valid_keys.flatten!
    each_key do |k|
      raise(ArgumentError, "Unknown key: #{k}") unless valid_keys.include?(k)
    end
  end

assert_valid_keys

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