I was just trying the sake task and got the same error.  I know this
isn't the right way to fix it, but it's quick and I don't care to dig
into the root of the problem.

Add the following to line 2361 of your rake.rb file:

 && @rakefile.is_a?(String)

So hacky :)

On Sep 11, 2:53 pm, Willem van den Ende <[EMAIL PROTECTED]>
wrote:
> Hi,
>
> > As always, let me know if you run into any other dependency issues.
>
> I tried to install merb 0.9.6 through rubygems, and it failed with
>
> Updating merb_datamapper ERROR:  While executing gem ...
> (Gem::InstallError)
>     merb_datamapper requires dm-core (= 0.9.6, runtime)
>
> I'm not sure if this is the right list to post to (the topic did seem
> to suggest it). I tried various things (e.g. downgrading merb, but it
> seems to want to be 0.9.5) and can't get merb and datamapper working
> together.
>
> When I gave up after a couple of hours trying, yesterday I tried
> DataMapper (0.9.5) without merb, and I like Datamapper a lot, so now I
> want this to work even more ;)
>
> Today I tried installing datamapper dev through sake, and that also
> failed :(.
>
> sake dm:clone
> rake aborted!
> can't convert true into String
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2361:in
> `expand_path'
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2361:in
> `raw_load_rakefile'
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:1997:in
> `load_rakefile'
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2048:in
> `standard_exception_handling'
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:1996:in
> `load_rakefile'
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:1981:in `run'
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:2048:in
> `standard_exception_handling'
> /usr/lib/ruby/gems/1.8/gems/rake-0.8.2/lib/rake.rb:1979:in `run'
> /usr/lib/ruby/gems/1.8/gems/sake-1.0.15/lib/sake.rb:282:in `run_rake'
> /usr/lib/ruby/gems/1.8/gems/sake-1.0.15/lib/sake.rb:188:in `run'
> /usr/lib/ruby/gems/1.8/gems/sake-1.0.15/bin/sake:5
> /usr/bin/sake:19:in `load'
> /usr/bin/sake:19
>
> This seems to be a sake problem however. Installing edgy gave the same
> errors (sake -T runs fine however).
>
> Anyway, I'd like to try merb and datamapper together, and so far
> haven't found a way to make them run.
> I'd appreciate any help.
>
> Kind regards,
>
> Willem van den Ende
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