rendered_format is removed in Rails 6.1

[nicksoto]

the relevant commit is here

[javierjulio]

Based on that commit and seeing other repos that have updated to account for the deprecation warning, I think we just need to change this line:

rabl-rails/lib/rabl-rails/library.rb

Line 28 in 4d3ec11

format = view.lookup_context.rendered_format || :json

to do the following instead:

format = view.lookup_context.formats.first || :json

Note: I'm not sure if that change would work on older Rails versions though.

I think this change in that same commit Nick shared backs the above suggestion since the rendered_format was set with the same value.

[javierjulio]

The rspec-rails gem has addressed the same issue here: rspec/rspec-rails#2100 so that should confirm the solution and that the change has to be conditional for Rails 6 and then anything else for older versions.

[navidemad]

Something like this :

format = (::Rails::VERSION::STRING >= '6' ? view.lookup_context.formats.first : view.lookup_context.rendered_format) || :json

[ccocchi]

Thank you, the warning have been removed in version 0.6.0 🙂