ruby on rails - Mongoid upsert with a different key -

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is possible upsert mongodb collection json/hash of fields, instead of using _id objectid field, use different indexed field such external_id?

i using update items receive feed on daily basis, , such, feed items don't contain internal id.

yes, possible upsert custom id in mongoid, in 3.0.0.rc circa june 27, 2012.

app/models/item.rb

class item   include mongoid::document    field :external_id, type: string   field :_id, type: string, default: ->{ external_id }   field :text, type: string end

test/unit/item_test.rb

require 'test_helper'  class itemtest < activesupport::testcase   def setup     item.delete_all   end    test "external id"     item.new( text: 'lorem ipsum' ).upsert     item.new( external_id: 'an external id', text: 'dolor sit amet' ).upsert     puts item.all.to_a.collect{|item|item.inspect}   end end

output

run options: --name=test_external_id

# running tests:  #<item _id: 4ff202501f98ce8202c03268, _type: nil, external_id: nil, text: "lorem ipsum"> #<item _id: external id, _type: nil, external_id: "an external id", text: "dolor sit amet"> .  finished tests in 0.028232s, 35.4208 tests/s, 0.0000 assertions/s.  1 tests, 0 assertions, 0 failures, 0 errors, 0 skips

to have install github, visit , clone from

https://github.com/mongoid/mongoid  bundle install bundle exec rake install

here's link commit makes possible.

https://github.com/mongoid/mongoid/commit/3062363bad3ab947d7689502d6805652b20e89a0

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