So you like ActiveAdmin, but are using Mongoid. And so far, ActiveAdmin hates on Mongoid because it uses ActiveRecord instead of ActiveModel. What’s a Mongoid to do? Develop your own admin system? As If!

First, Watch this Issue

There’s already a github issue about adding support for other ORMs. Maybe voice your support there.

Then, Monkey Patch!

Add this code to your config/initializers/active_active_for_mongoid.rb

It’s easy to tell what’s going on with the code – ActiveAdmin needs a way to tell what the name of the collection is (otherwise you get the quoted_table_name problem). Mongoid also has some custom ways of sorting. For example,

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#ActiveRecord
Product.order("published_at DESC").all
#Mongoid
Product.all(sort: [[ :published_at, :desc ]])

The mongo queries that get executed look like:

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MONGODB yourapp_development['users'].find({}).limit(30).sort([["email", :desc]])
MONGODB yourapp_development['users'].find({}).limit(30).sort([["email", :asc]])

Props to https://github.com/ebeigarts for the patch. It gets you to at least run with the ball for now.

Downsides

• Filters are disabled
• Comments are disabled (I have never used this with ActiveAdmin though)
• You’ll probably need to disable this once ActiveAdmin closes issue #26 (which you are now watching, right?)

Version Disclosure: This post was valid with ActiveAdmin 0.3.4, Mongoid 2.3.4 and Rails 3.0/3.1