reify does not work with custom setters

[graaff]

I'm working with paper_trail 3.0.7 and objects with custom setters don't properly reify. I'm running into this issue specifically with the acts-as-taggable-on gem. This gem introduces a tag_list getter and setter as an interface to handle multiple tags via a string.
The object I'm trying to reify has a tag_list attribute in it, but this fails with the following error:

    from /usr/lib64/ruby/gems/2.0.0/gems/activerecord-4.0.13/lib/active_record/attribute_methods/dirty.rb:70:in `write_attribute'
    from /usr/lib64/ruby/gems/2.0.0/gems/activerecord-4.0.13/lib/active_record/attribute_methods.rb:359:in `[]='
    from /usr/lib64/ruby/gems/2.0.0/gems/paper_trail-3.0.7/lib/paper_trail/version_concern.rb:152:in `block (2 levels) in reify'
    from /usr/lib64/ruby/gems/2.0.0/gems/paper_trail-3.0.7/lib/paper_trail/version_concern.rb:150:in `each'
    from /usr/lib64/ruby/gems/2.0.0/gems/paper_trail-3.0.7/lib/paper_trail/version_concern.rb:150:in `block in reify'
    from /usr/lib64/ruby/gems/2.0.0/gems/paper_trail-3.0.7/lib/paper_trail/version_concern.rb:225:in `call'
    from /usr/lib64/ruby/gems/2.0.0/gems/paper_trail-3.0.7/lib/paper_trail/version_concern.rb:225:in `without_identity_map'
    from /usr/lib64/ruby/gems/2.0.0/gems/paper_trail-3.0.7/lib/paper_trail/version_concern.rb:117:in `reify'

This happens because the specific code in version_concern.rb checks if the object reponds to "tag_list=" (which is does), but then proceeds to use "object[:tag_list] =" instead, which is not the same thing. I would at least expect the check and method to match so it would produce consistent results. I would also expect the setter to be called so that acts-as-taggable-on can do its magic on the tag_list value.

[batter]

I believe PR #512 would fix this... I just need to do a bit more research to see what (if any) ramifications there are by changing it / figure out why it was using the object[:tag_list] = syntax in the first place..

[batter]

Can you try this vattr_support branch and see if it fixes your issue? Thanks

[graaff]

Yes, this works as expected for my case, including the reification of the tags via tag_list.