Ruby, method_missing and 'no id given'
Note: if you just happen to be interested in knowing possible causes for the ‘no id given’ error message in Ruby, go to the last paragraph of this post.
I don’t have reason to do a lot of Ruby metaprogramming myself, although being a Rails user, I surely receive a lot of benefit from it. Metaprgramming is used extensively in Rails, the most visible example I can think of is the ActiveRecord Dynamic Finders.
Working on my current pet project, I had occasion to do a little metaprogramming in a similar vein to the ActiveRecord Dynamic Finders. I have a model with two sets of paperclip attachments. One is for when an attachment is first uploaded to my server and the other is for when the attachment is subsequently moved to Amazon S3 for permanent storage. The file stored on my server is deleted after successful transfer to Amazon S3. Read more...
