Lint/AmbiguousOperator: Ambiguous negative number operator

Question

I am using rubocop gem. Following is my factorybot code.

factory :cut, class: CutSetting do

  maximum_length 100
  max_colors_cut_together -1

end

Rubocop give the following errors for negative value -1.

Lint/AmbiguousOperator: Ambiguous negative number operator. Parenthesize the method arguments if it's surely a negative number operator, or add a whitespace to the right of the - if it should be a subtraction. (https://github.com/rubocop-hq/ruby-style-guide#method-invocation-parens)

How to solve this problem. PLEASE HELP ME :(.

Thanks in advance.

Note that static attributes are deprecated in FactoryBot. In the next version you'll need to use brackets `{}` around all values. — Drenmi, Oct 10 '18 at 04:48

Ilya Konyukhov · Answer 1 · 2018-10-08T14:41:02.070

1

I can't add more to Rubocop's error description, it's clear and comprehensive. Adding brackets to -1:

max_colors_cut_together { -1 }

should eliminate that error.

See this cheatsheet as a quick guide on factory_bot patterns.

edited Oct 08 '18 at 14:41

answered Oct 08 '18 at 12:25

Ilya Konyukhov

score 1 · Accepted Answer · answered Oct 08 '18 at 15:03

1

max_colors_cut_together -1 is actually ruby's syntax sugar for method invocation max_colors_cut_together(-1)

answered Oct 08 '18 at 15:03

mikdiet

Thanks a lot. llya Konyukhov's and your answer both are working. – Bablu Patel Oct 09 '18 at 05:12

2 Answers2