On Friday, September 29, 2017 at 3:26:22 PM UTC-7, French Fry wrote:
>
> I used this example from the read me (using my own tables / columns) and
> it works fine. Foreign key picks up the parent table primary key. I did
> this in bin/sequel.
>
> post = Post.create(name: 'hi!')post.comments
> comment = Comment.create(text: 'hi')post.add_comment(comment)
>
>
> However in my app code, trying to do the same thing in an iteration, the
> 'add_comment' throws
> the error - `block in grab_files': undefined method `add_folder' for
> nil:NilClass (NoMethodError)
>
> Here is the method (it's ugly, and perhaps the error is do to some screwy
> logic). To explain though the way the code traverses is it picks up the
> folder path and then the individual files, in other words they should be in
> order. First path, then a bunch of folders, then it should start the cycle
> again.
>
> Here is the classes -
>
>
> class Path < Sequel::Model
> plugin :validation_helpers
> one_to_many :folders
>
>
> def validate
> super
> validates_presence [:path]
> end
> end
>
>
> class Folder < Sequel::Model
> many_to_one :path
> end
>
> And here the logic -
>
> def grab_files
> music_list = Dir.glob("/vagrant/TestRails/Music/**/*")
> music_list.each do |x|
> if File.ftype(x) == "directory"
> path = Path.create(path: x)
> path.folders
> elsif File.ftype(x) == "file"
> folder = Folder.create(folder_name: (File.basename(x)))
> path.add_folder(folder)
>
path is not set here, so the value of path here is nil, hence the
NoMethodError add_folder for nil:NilClass
I'm guessing you should add something like:
path = Path.create(path: x)
to the elsif branch or move the existing Path.create call to before the if
branch.
Thanks,
Jeremy
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