Weird and inconsistent Model issues

I feel like I'm missing something rather important in both
circumstances, but I can't seem to figure either out:

1) I have a model named TestCase -
class TestCase < ActiveRecord::Base
  belongs_to :test_suite
  scope :queued, lambda { where("test_cases.suite_id IS NOT NULL") }
  scope :assigned_to, lambda { |sid| where(:suite_id => sid) }
end

The controller can interact with it perfectly fine. When trying to
display information from it in either the view or via the view helper
such as TestCase.all, I get a NoMethodError (undefined method `all'.)
If I call it with ::TestCase.all, that works. I had a theory that it
has something to do with the fact that it's associated to another
model (belongs_to ...), I just can't find anything to confirm that or
tell me why that happens.

2) On another project I have yet another model named Artwork. Again,
it has associations (belongs_to). In this case, I can access it just
fine in the view, and all the methods within it work fine for the
controller except if I try to do dynamic method calls. In this case I
have a simple toggle for -

@artwork = Artwork.find(params[:id])
value = params[:value].to_sym
@artwork.update_attributes(value => !@artwork.method(value).call)

That gives me a NoMethodError. However, if I add - if
@artwork.respond_to?(value) - then it works as expected. Again, I
can't figure out why.

Both items I get working using the mentioned methods, but again, I
feel like I'm really missing something important here.

I feel like I'm missing something rather important in both
circumstances, but I can't seem to figure either out:

1) I have a model named TestCase -
class TestCase < ActiveRecord::Base
belongs_to :test_suite
scope :queued, lambda { where("test_cases.suite_id IS NOT NULL") }
scope :assigned_to, lambda { |sid| where(:suite_id => sid) }
end

The controller can interact with it perfectly fine. When trying to
display information from it in either the view or via the view helper
such as TestCase.all, I get a NoMethodError (undefined method `all'.)
If I call it with ::TestCase.all, that works. I had a theory that it
has something to do with the fact that it's associated to another
model (belongs_to ...), I just can't find anything to confirm that or
tell me why that happens.

You're probably picking up one of the other TestCase classes that are
part of rails or the ruby standard library (eg ActionView::TestCase)

@artwork = Artwork.find(params[:id])
value = params[:value].to_sym
@artwork.update_attributes(value => !...@artwork.method(value).call)

That gives me a NoMethodError. However, if I add - if
@artwork.respond_to?(value) - then it works as expected. Again, I
can't figure out why.

Attribute accessors methods are only created when they are first used,
so method doesn't find them. If you just use send instead that that
should work fine (since that will hit the method_messing code that
creates those methods (which calling respond_to also does))

Fred

Oh wow, I didn’t even see that that there was already a defined TestCase class. Well, that makes much more sense! So I’m not going insane, just … blind. Good to know! As for send … I thought I read once upon a time that send took more processing time or
something similar. I guess it doesn’t matter if respond_to is doing essentially the same thing in the end. Either way … Thanks. This clears up some things driving me insane!