Fix warnings

[stas]

Hi, I'm on latest released rails with public_activity from master. I get the following warnings when using/testing public_activity:

...
DEPRECATION WARNING: You're trying to create an attribute `recipient_type'. Writing arbitrary attributes on a model is deprecated. Please just use `attr_writer` etc. (called from create_activity at /home/stas/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/bundler/gems/public_activity-911c4190580e/lib/public_activity/common.rb:84)
...

Since v0.4.0 is not released, thought you can take a look.
Thanks in advance.

[farnoy]

Hi, which version of rails are you using?

[stas]

As for now latest rails is v3.2.8 which I am using.
Also there's no backtrace, it's just a warning.

I might be wrong, but this happens with tracked models, in my case, I hooked to :create event.

[farnoy]

Are there any more deprecation warnings, like owner_type, trackable_type?

[stas]

Just recipient_id and recipient_type:

.DEPRECATION WARNING: You're trying to create an attribute `recipient_id'. Writing arbitrary attributes on a model is deprecated. Please just use `attr_writer` etc. (called from create_activity at /home/stas/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/bundler/gems/public_activity-911c4190580e/lib/public_activity/common.rb:84)
DEPRECATION WARNING: You're trying to create an attribute `recipient_type'. Writing arbitrary attributes on a model is deprecated. Please just use `attr_writer` etc. (called from create_activity at /home/stas/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/bundler/gems/public_activity-911c4190580e/lib/public_activity/common.rb:84)

I believe if I skip any of the activity attributes like owner or etc. it will be present for those too.

[farnoy]

What you mean is that the warnings appear on attributes that you didn't assign? Could you try assigning none then, to see if warnings for owner and trackable appear too?

If you're upgrading from 0.3.x, did you execute rails generate public_activity:migration_upgrade?

[stas]

Yep that solved the issue.
Thanks.