changeset not work

[piya23300]

I use rails 4.1.8 , paper_trail 3.0.6

event = 'update'
object_changes = "--- !ruby/hash:ActiveSupport::HashWithIndifferentAccess\nstatus_id:\n- 1\n- 2\n"
when I call object.versions.last.changeset, it returns {}

Cloud you help me?

[batter]

What happens if you load up a console and run PaperTrail.serializer.load(object_changes)?

If you get a return value from that beyond {}, then here is the codeblock it tries to execute when you invoke changeset. So there is likely some sort of error being raised within that block that is getting rescued.

[piya23300]

object_change : "--- !ruby/hash:ActiveSupport::HashWithIndifferentAccess\nstatus_id:\n- 6\n- 8\n"

I run PaperTrail.serializer.load(object_changes) it works and returns {"status_id"=>[6, 8]}

I run

@changeset ||= HashWithIndifferentAccess.new(_changes).tap do |changes|
   item_type.constantize.unserialize_attribute_changes(changes)
end

it works and returns {"status_id"=>[6, 8]}

and last
I run version_object.changeset then return {}
Why it is getting rescued?

[batter]

It's hard to say what exactly the issue is with this data. I would recommend running gem which paper_trail, finding the source location, and then going and editing lib/paper_trail/version_concern.rb and commenting out the rescue statement portion of that method, and then re-running the changeset method and checking the stack trace.

[piya23300]

Thank you,
If it tests it, I will tell you.

[batter]

@piya23300 - did you give that a try?

[piya23300]

@batter Thank you to alert me haha I forgot it ^^

I tests it, I found error

NameError: undefined local variable or method `version_class_name' for #<Class:0x007f8152ceb578>

I think because my class use STI

AAA::BBB::CCC class that use paper_trail
but object.versions.last.item_type = AAA::BBB
AAA::BBB class doesn't want use paper_trail
this reason of error

and then
I updated item_type from "AAA::BBB" to "AAA::BBB::CCC"
object.versions.last.update(item_type: "AAA::BBB::CCC")

object.versions.last.changeset it work!

I try to fix it , I found cause from belongs_to :item, :polymorphic => true
http://stackoverflow.com/questions/21886440/combine-sti-and-polymorphic-with-rails-4

When I new version object object.versions.new
item_type alway sets self.class.base_class.name ("AAA::BBB")

I can't solve it.
Cloud you help me? please....

[batter]

Does #362 help you at all? I'll have to take a closer look at this and try to generate a test case. If you can provide a dummy app or PR w/ failing tests that would help a lot.

[batter]

This is a dup of #404, closed in favor of that one, clearly there is an issue when PaperTrail is used in conjunction with STI that needs to be addressed.