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It was added in 66f8997 to be compatible with Rack::ContentLength. However, to_ary was removed from Rack::Response in 2.1.0, and Rack::ContentLength stopped checking for response bodies to define to_ary in 2.2.0. In addition, Rack 3 will eventually require response bodies that define to_ary to have a proper return value. Since the minimum supported Rack version is already 2.2.0, to_ary can be safely removed now.
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tenderlove
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Sep 23, 2022
Remove to_ary from RackBody
zzak
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Oct 13, 2023
There is an inherit complexity with wrapping the Rack body inside Rails which can lead to bugs, like rails#49588. While rails#49616 fixed the bug, it's probably not a good long-term solution. If we go all the way back to 6a89850, we can see this was the original behavior. However, we were trying to solve a separate issue with streaming bodies during disconnect. The `live_stream_test#test_abort_with_full_buffer` test fails in this PR, but I wanted to raise that maybe this could be handled a different way. Also there are two failures in `response_test` which are questions to me: * `ResponseTest#test_[response.to_a].flatten_does_not_recurse_infinitely` * `ResponseTest#test_compatibility_with_Rack::ContentLength` The first seems it is actually resolved upstream, per this comment: rails#47092 (comment) The second means we broke `Rack::ContentLength` and there is a bit on this in rails#44953. FWIW: I'm not proposing this PR exactly, but looking for a path forward and would love some feedback. 🙇
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Summary
It was added in 66f8997 to be compatible with
Rack::ContentLength.However,
to_arywas removed fromRack::Responsein 2.1.0, andRack::ContentLengthstopped checking for response bodies to defineto_aryin 2.2.0. In addition, Rack 3 will eventually require responsebodies that define
to_aryto have a proper return value.Since the minimum supported Rack version is already 2.2.0,
to_arycanbe safely removed now.
Other Information
to_aryremoved fromRack::Responsein Removeto_aryfrom Response rack/rack#1453to_arycheck removed fromRack::ContentLengthin Set Content-Length response header even for bodies not responding to to_ary rack/rack#1509body.to_aryis present rack/rack#1876