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Type:
Bug
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Resolution: Done
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Priority:
Major - P3
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Affects Version/s: 2.2.1
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Component/s: Public API
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None
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Environment:Ruby 2.3.0, Mac OS X 10.10.5, MongoDB 2.6.11, Ruby Mongo Driver 2.2.1
Specifying a majority write concern in a connection string causes writes to fail with an operation failure of "w has to be a number or string".
Code to reproduce:
require 'mongo' client = Mongo::Client.new('mongodb://localhost:27017/foo?w=majority') client[:bar].insert_one(baz: 1)
Expected output:
A successful write.
Actual output:
D, [2016-01-15T16:50:39.710925 #44352] DEBUG -- : MONGODB | localhost:27017 | foo.insert | STARTED | {"insert"=>"bar", "documents"=>[{:baz=>1, :_id=>BSON::ObjectId('5699235fc78459ad40000000')}], "ordered"=>true, "writeConcern"=>{"w"=>:majority}}
D, [2016-01-15T16:50:39.712173 #44352] DEBUG -- : MONGODB | localhost:27017 | foo.insert | FAILED | w has to be a number or a string (9) | 0.001123s
Mongo::Error::OperationFailure: w has to be a number or a string (9)
from /Users/mudge/.gem/ruby/2.3.0/gems/mongo-2.2.1/lib/mongo/operation/result.rb:256:in `validate!'
The issue seems to be that the parsed write concern is the Symbol :majority rather than the String 'majority'. Overriding this with with fixes the issue:
client[:bar].with(write: { w: 'majority' }).insert_one(baz: 1)
D, [2016-01-15T16:53:08.175629 #44352] DEBUG -- : MONGODB | localhost:27017 | foo.insert | STARTED | {"insert"=>"bar", "documents"=>[{:baz=>1, :_id=>BSON::ObjectId('569923f4c78459ad40000001')}], "ordered"=>true, "writeConcern"=>{:w=>"majority"}}
D, [2016-01-15T16:53:08.342142 #44352] DEBUG -- : MONGODB | localhost:27017 | foo.insert | SUCCEEDED | 0.16629s
=> #<Mongo::Operation::Result:70352385106360 documents=[{"ok"=>1, "n"=>1}]>