Question

@video = Video.find(params[:id])

@lengths = @video.each do |i|
  @length = i.length * 60
end

Firstly, I presumed @video would have an each, but instead got this error:

undefined method `each' for #<Video:0x4738428>

Secondly, is there any Ruby one-liner magic that could substitute for the last 3 lines?

Answer 1

@video is not an array in this case, it is an object because you asked the Video model to return only one video, the one with the id given in the params array.

In case you want to retrieve all videos from the database, do this:

@video = Video.all

Now @video will be an array of video objects.