This blog is part of our Rails 7 series.
Rails 7 deprecates Enumerable#sum to the calls with non-numeric arguments. To ignore the warning we should use a suitable initial argument.
Before Rails 7
1=> %w[foo bar].sum 2=> "foobar" 3 4=> [[1, 2], [3, 4, 5]].sum 5=> [1, 2, 3, 4, 5]
After Rails 7
1=> %w[foo bar].sum 2=> Rails 7.0 has deprecated Enumerable.sum in favor of Ruby's native implementation available since 2.4. 3 Sum of non-numeric elements requires an initial argument. 4 5=> [[1, 2], [3, 4, 5]].sum 6=> Rails 7.0 has deprecated Enumerable.sum in favor of Ruby's native implementation available since 2.4. 7 Sum of non-numeric elements requires an initial argument.
To avoid the deprecation warning, we should use suitable argument as below.
1=> %w[foo bar].sum('') 2=> "foobar" 3 4=> [[1, 2], [3, 4, 5]].sum([]) 5=> [1, 2, 3, 4, 5]
Check out this pull request for more details.
