Mongoid equivalent of ActiveRecord's "collection?" method for relations-CodePudding

I am using Mongoid and trying to do something similar to ActiveRecord's collection? method.

I have a method that gets the relations from a class like:

def relations
  object.class.relations
end

This makes a hash of the relation objects.

Then in another method I am doing this:

if relations[key].collection?
   do stuff...
else
   do something else...
end

collection? isn't a method in this situation like it is in ActiveRecord. So I get

undefined method `collection?' for #<Mongoid::Association::Referenced::BelongsTo:0x00007feed3b61240>

What is the Mongoid way of doing this type of conditional?

CodePudding user response：

I'm assuming the method you're talking about it this one, which seems like it just returns true on has_many and HABTM associations... As of 8.0 we have the many? method to check if its HasMany or and EmbedsMany, but I don't think that is quite what you need. I can suggest a method for right now, and I will open a ticket to see if we can have this added:

def collection?(association)
  [
    Mongoid::Association::Referenced::HasMany, 
    Mongoid::Association::Referenced::HasAndBelongsToMany
  ].any? { |r| association.is_a?(r) }
end

EDIT: You can track this issue here.