40 lines
1.5 KiB
Markdown
40 lines
1.5 KiB
Markdown
---
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title: "Upgrading to Mongoid Beta 6"
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kind: article
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slug: upgrading-to-mongoid-beta-6
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created_at: 2010-05-30
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tags:
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- Ruby
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- Rails
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- mongoid
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- monogdb
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---
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If you are working with Rails 3 and Mongoid, you're likely to upgrade to [`mongoid-2.0.0.beta6`][1]. That's okay, but you will run into a few problems. Among others, one will be:
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Database should be a Mongo::DB, not NilClass
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or
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Mongoid::Errors::InvalidDatabase: Mongoid::Errors::InvalidDatabase
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Another, Mongoid-related problem is the error `uninitialized constant OrderedHash`.
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Luckily, these problems can be solved quite easily.
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[1]: http://rubygems.org/gems/mongoid
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~
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The first thing you need to do is make sure you use the right version of `bson_ext`. Beta 6 requires you to run `bson_ext-1.0.1` or you'll get the `OrderedHash` error. Okay, with that out of the way, let's focus on the MongoDB errors.
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The problem is that Mongoid is accessed/used before it is properly initialized. To resolve this issue, add the following line to your other requires at the top of `config/application.rb`.
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:::ruby
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require 'mongoid/railtie'
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With that, you initialize Mongoid correctly. Hope it helps.
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Update: I also ran into `keys must be strings or symbols` errors. This is now a _known issue_ with `mongoid-2.0.0.beta6` and has been fixed in `master`. If you are using Bundler (you are, aren't you?) then you can use the master branch instead of the gem:
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:::ruby
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# gem 'mongoid', '2.0.0.beta6'
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gem 'mongoid', :git => 'http://github.com/durran/mongoid.git'
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