WIP: admin_user scope not being built

Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem 'ransack-mongoid', git: 'https://github.com/activerecord-hackery/ransack-mongoid'
+gem 'ransack-mongoid', git: 'https://github.com/jesusalc/ransack-mongoid', branch: 'rails-6-mongoid-7-ruby-2-7-0'
 
 gem 'rails', '>= 5.2', '< 6.1'
 

Gemfile.lock

@@ -1,8 +1,9 @@
 GIT
-  remote: https://github.com/activerecord-hackery/ransack-mongoid
-  revision: bd1935293d2f285fa7cf33d2c5c90d981bf67338
+  remote: https://github.com/jesusalc/ransack-mongoid
+  revision: b7f68881081731afdfaa010499d06adc93d17d71
+  branch: rails-6-mongoid-7-ruby-2-7-0
   specs:
-    ransack-mongoid (0.1.0)
+    ransack-mongoid (0.1.1)
 
 PATH
   remote: .

lib/active_admin/mongoid/association/relatable.rb

@@ -11,4 +11,7 @@ def foreign_key
     return if embeds?
     foreign_key.to_sym rescue nil
   end
+
+  alias_method :association_primary_key, :foreign_key
+
 end

lib/active_admin/mongoid/document.rb

@@ -70,6 +70,14 @@ def associations
     def reflections *a
       relations *a
     end
+
+    def ransackable_scopes_skip_sanitize_args
+      []
+    end
+
+    def self.ransackable_scopes(auth_object = nil)
+      []
+    end
   end
 end
 

test_app/app/models/post.rb

@@ -10,4 +10,9 @@ class Post
 
   embeds_one :author
   field :'author.city.name'
+
+  def self.ransackable_scopes(auth_object = nil)
+    [:admin_user]
+  end
+
 end