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  1. Mongoid
  2. MONGOID-5205

Document reloading behavior for changed attributes

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    • Type: Icon: Improvement Improvement
    • Resolution: Fixed
    • Priority: Icon: Minor - P4 Minor - P4
    • 7.4.0
    • Affects Version/s: None
    • Component/s: Docs
    • Fully Compatible

      The reloading documentation (https://docs.mongodb.com/mongoid/master/reference/crud/#reloading) says:

      > Use the reload method to fetch the most recent version of a document from the database:

      However, in testing for MONGOID-5199 it appears that changed attributes are potentially remaining changed after reloading:

      class Band
  include Mongoid::Document
  embeds_one :label
end

class Label
  include Mongoid::Document
  field :name, type: String
  embedded_in :band
end

b = Band.create!

Band.with_session do |s|
  s.start_transaction

  label = Label.new(name: "Neil")
  b.label = label

  b.reload
  puts b.label # <Label _id: 61bcab66d1327a521a5054a9, name: "Neil">

  s.commit_transaction
end

      The following example maintains a changed value but somehow it's not the most recent one:

      Band.with_session do |s|
  s.start_transaction

  label = Label.new(name: "Neil")
  b = Band.new(label: label)
  b.save!
  b.label = nil
  b.label = label
  b.reload
  puts b.label # nil

  s.commit_transaction
end

      The scope of this ticket is to investigate whether changed attributes are retained through reload and update the documentation accordingly.

            Assignee:
            oleg.pudeyev@mongodb.com Oleg Pudeyev (Inactive)
            Reporter:
            oleg.pudeyev@mongodb.com Oleg Pudeyev (Inactive)
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              Created:
              Updated:
              Resolved: