How to pass array as separated arguments to method
This seems close to what I need but it doesn't work for me.
Achieving `call_user_func_array` in Ruby
I have a list as Constant
TYPE = %w(:groups :projects)
I'm using https://github.com/brainspec/enumerize on my RelatedList model which has
enumerize :list_type, in: %w(groups projects), scope: :type
So as per documentation on the github page,
RelatedList.type(:groups) # returns all RelatedList of type 'groups'
However, I want to get all RelatedList contained in my constant TYPE
so I tried
RelatedList.type(TYPE) # doesn't work RelatedList.send(:type, TYPE) # doesn't work RelatedList.send(:type, *TYPE) # doesn't work.
RelatedList.type expects a list of separate arguments as symbols but what I have is an array of symbols.
How do I achieve that?
as per DNNX request in answer below, here is the full traceback.
NoMethodError: undefined method `value' for nil:NilClass
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/enumerize-bc01a5cb3c79/lib/enumerize/activerecord.rb:34:in `block (2 levels) in _define_scope_methods!'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/enumerize-bc01a5cb3c79/lib/enumerize/activerecord.rb:34:in `map'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/bundler/gems/enumerize-bc01a5cb3c79/lib/enumerize/activerecord.rb:34:in `block in _define_scope_methods!'
from (irb):2
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands/console.rb:90:in `start'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/railties-4.0.0/lib/rails/commands/console.rb:9:in `start'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus/rails.rb:134:in `console'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:116:in `block in command'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:103:in `fork'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:103:in `command'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:80:in `block (3 levels) in go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:80:in `fork'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:80:in `block (2 levels) in go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:73:in `each'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:73:in `block in go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:62:in `loop'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:62:in `go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:78:in `block (3 levels) in go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:78:in `fork'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:78:in `block (2 levels) in go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:73:in `each'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:73:in `block in go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:62:in `loop'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:62:in `go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:78:in `block (3 levels) in go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:78:in `fork'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:78:in `block (2 levels) in go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:73:in `each'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:73:in `block in go'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:62:in `loop'
from /Users/kw/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/zeus-0.13.3/lib/zeus.rb:62:in `go'
Answers
... what I have is an array of symbols
No, is not. This TYPE = %w(:groups :projects) is an array of two strings ':groups' and ':projects', not an array of symbols.
Try this instead:
TYPE = %w(groups projects) RelatedList.type(*TYPE)
Or, if you is lucky and running your app on Ruby 2.0.0, use symbol array literal:
TYPE = %i(groups projects) #=> [:groups, :projects]