Module: Cassandra::Helpers

Included in:
Cassandra, Mock
Defined in:
lib/cassandra/helpers.rb

Instance Method Summary collapse

Instance Method Details

#extract_and_validate_params(column_family, keys, args, options) ⇒ Object

Raises:

  • (ArgumentError)

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# File 'lib/cassandra/helpers.rb', line 3

def extract_and_validate_params(column_family, keys, args, options)
  options = options.dup
  column_family = column_family.to_s
  # Keys
  [keys].flatten.each do |key|
    raise ArgumentError, "Key #{key.inspect} must be a String for #{caller[2].inspect}." unless key.is_a?(String)
  end

  # Options
  if args.last.is_a?(Hash)
    extras = args.last.keys - options.keys
    raise ArgumentError, "Invalid options #{extras.inspect[1..-2]} for #{caller[1]}" if extras.any?
    options.merge!(args.pop)      
  end

  # Ranges
  column, sub_column = args[0], args[1]
  raise ArgumentError, "Invalid arguments: subcolumns specified for a non-supercolumn family" if sub_column && !is_super(column_family)      
  klass, sub_klass = column_name_class(column_family), sub_column_name_class(column_family)
  range_class = column ? sub_klass : klass

  [:start, :finish].each do |opt|
    options[opt] = options[opt] ? range_class.new(options[opt]).to_s : ''
  end

  [column_family, s_map(column, klass), s_map(sub_column, sub_klass), options]
end

#s_map(el, klass) ⇒ Object

Convert stuff to strings.


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# File 'lib/cassandra/helpers.rb', line 32

def s_map(el, klass)
  case el
  when Array then el.map { |i| s_map(i, klass) }
  when NilClass then nil
  else
    klass.new(el).to_s
  end
end