On 28/01/2009, at 7:50 AM, Zach Dennis wrote:
On Tue, Jan 27, 2009 at 2:48 PM, Nick Hoffman <n...@deadorange.com>
wrote:
G'day folks. I've been beating my head on this one problem for a
couple of
hours, and have managed to figure out what's causing it. However, I
don't
understand why it's happening, nor do I know how to solve or get
around it.
One of my methods clones an arg, and it seems that doing so causes
state to
leak out. I discovered this because changing this:
new_subtitle = subtitle.clone
to this:
new_subtitle = subtitle
causes the problem to disappear.
Before we get into the code snippets, are there any known caveats,
warnings,
or problems with writing specs that cover the cloning or
duplication of
objects?
Here's the code, specs, and spec output:
http://gist.github.com/53482
As you can see, in the "should clone ..." example, the expectation
on line
24 succeeds, but the same expectation on line 28 fails. After that,
the same
expectation fails in the "should not leak state" example.
What does your full SubtitleFile class look like? It looks like there
is an issue with how the #subtitles method is storing information.
Since you're using ActiveRecord::BaseWithoutTable there are probably
not going to be any unique primary keys amongst your SubtitleFiles to
help differentiate them. So if #subtitles is a has_many, every call to
SubtitleFile#subtitles may lookup Subtitles in the exact same way w/o
any unique key to use to differentiate which subtitles belong to which
subtitle files which would produce the results you are seeing.
Is Subtitle a ActiveRecord::BaseWithoutTable or a real
ActiveRecord::Base model?
Hi Zach. Subtitle is an ActiveRecord::BaseWithoutTable model; it does
not inherit from ActiveRecord::Base .
The SubtitleFile "subtitles" attribute is actually just an Array. I
didn't bother to setup a has_many relationship with Subtitle.
SubtitleFile#subtitles is a standard getter method that ActiveRecord
sets up for me.
In my app's console, I tested out a has_many relationship between two
ActiveRecord::BaseWithoutTable models, and there weren't any mixups
after creating associations between different model instances.
Here's the source for the SubtitleFile model. The #add_subtitle! in
question starts on line 74:
http://gist.github.com/54028
Thanks, mate.
Nick
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