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Type:
Bug
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Resolution: Works as Designed
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: Associations
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Labels:None
Given an embeds_many association, if a host model is unsaved and there are instances added to the embeds_many association, length on the association returns the correct number of instances but count returns 0. Once the host model is saved count behaves correctly:
class School include Mongoid::Document embeds_many :students end class Student include Mongoid::Document embedded_in :school end a = School.new(students: [Student.new]) a.students.length a.students.count a.save! a.students.length a.students.count
irb(main):033:0> a = School.new(students: [Student.new]) => #<School _id: 5dacbb6b026d7c52b820f0bf, > irb(main):034:0> a.students.length => 1 irb(main):035:0> a.students.count => 0 irb(main):036:0> a.save! D, [2019-10-20T15:54:19.832664 #21176] DEBUG -- : COMMAND | localhost:14422 | mongoid.insert | STARTED | {"insert"=>"schools", "ordered"=>true, "documents"=>[{"_id"=>BSON::ObjectId('5dacbb6b026d7c52b820f0bf'), "students"=>[{"_id"=>BSON::ObjectId('5dacbb6b026d7c52b820f0c0')}]}], "$clusterTime"=>{"clusterTime"=>#<BSON::Timestamp:0x0000563ac5a5d448 @seconds=1571252182, @increment=1>, "signature"=>{"hash"=><BSON::Binary:0x47405212035300 type=generic data=0x0000000000000000...>, "keyId"=>0}}, "txnNumber"=>#<BSON::Int64:0x0000563ac6af12a0 @integer=1>, "lsid"=>{"id"=><BSON::Binary:0x47405220474300 type=uuid data=0x8875052a35694b8b...>}} D, [2019-10-20T15:54:19.840960 #21176] DEBUG -- : COMMAND | localhost:14422 | mongoid.insert | SUCCEEDED | 0.007746822s => true irb(main):037:0> a.students.length => 1 irb(main):038:0> a.students.count => 1 irb(main):039:0>