Using 2.4.4, #each loops through my has_many association objects twice:

class Parent

has_many :items, :class_name=>"Something::Item", as: :itemizable, dependent: :nullify

...

class Something::Item

belongs_to :itemizable, polymorphic: true

...

In parent...

times_run = 0
p "items size #

{items.size}

"
items.each do |pl|
times_run += 1
p "item #

{pl}

"
end
p "times run #

{times_run}

"

result...

"items size 3"
"item #<Something::Item:0x2dbd8e4>"
"item #<Something::Item:0x2db0e00>"
"item #<Something::Item:0x2da5618>"
"item #<Something::Item:0x2dbd8e4>"
"item #<Something::Item:0x2db0e00>"
"item #<Something::Item:0x2da5618>"
"times run 6"

thx, g