Mongoid V4 uses bson v2 which is not compatible with mongo and therefore mongo_mapper

.travis.yml

@@ -10,7 +10,7 @@ rvm:
   - 2.1
   - 2.2
   # - jruby-18mode # JRuby in 1.8 mode
-  - jruby-19mode # JRuby in 1.9 mode
+  - jruby-1.7 # JRuby in 1.9 mode
   - rbx-2.2.1
 
 services: mongodb
@@ -18,13 +18,16 @@ services: mongodb
 gemfile:
   - gemfiles/rails_3.2.gemfile
   - gemfiles/rails_4.0.gemfile
+  - gemfiles/rails_4.0_bson1.gemfile
   - gemfiles/rails_4.1.gemfile
+  - gemfiles/rails_4.1_bson1.gemfile
   - gemfiles/rails_4.2.gemfile
+  - gemfiles/rails_4.2_bson1.gemfile
 
 matrix:
   allow_failures:
     - rvm: rbx-2.2.1
-    - rvm: jruby-19mode
+    - rvm: jruby-1.7
   exclude:
     - rvm: 1.9.3
       gemfile: gemfiles/rails_4.1.gemfile

Gemfile

@@ -6,9 +6,11 @@ gem 'rubysl',                           :platforms => :rbx
 gem "jruby-openssl",                    :platforms => :jruby
 gem "activerecord-jdbcsqlite3-adapter", :platforms => :jruby
 gem "rails", "~>4.1"
-gem 'mongoid'
+gem 'mongoid', '~>4.0' if Gem::Version.create(RUBY_VERSION.dup) >= Gem::Version.create('1.9.3')
 gem 'sequel'
-gem 'mongo_mapper', '~> 0.13'
+# Since mongoid V4 requires incompatible bson V2, cannot have mongoid (V4 or greater)
-gem 'bson_ext',                          :platforms => :ruby
+# and mongo_mapper ( or mongo ) in the same application
+#gem 'mongo_mapper', '~> 0.13'
+#gem 'bson_ext',                          :platforms => :ruby
 
 gemspec

gemfiles/rails_3.2.gemfile

@@ -7,9 +7,9 @@ gem 'rubinius-developer_tools',         :platforms => :rbx
 gem "jruby-openssl",                    :platforms => :jruby
 gem "activerecord-jdbcsqlite3-adapter", :platforms => :jruby
 gem "rails", "3.2.21"
-gem 'mongoid' if Gem::Version.create(RUBY_VERSION.dup) >= Gem::Version.create('1.9.3')
+gem 'mongoid', '~>3.1' if Gem::Version.create(RUBY_VERSION.dup) >= Gem::Version.create('1.9.3')
 gem 'sequel'
-gem 'mongo_mapper', '~> 0.13'
+gem 'mongo_mapper', '~>0.13'
 gem 'bson_ext',                          :platforms => :ruby
 
 gemspec :path => "../"

gemfiles/rails_4.0.gemfile

@@ -7,9 +7,7 @@ gem 'rubinius-developer_tools',         :platforms => :rbx
 gem "jruby-openssl",                    :platforms => :jruby
 gem "activerecord-jdbcsqlite3-adapter", :platforms => :jruby
 gem "rails", "4.0.13"
-gem 'mongoid' if Gem::Version.create(RUBY_VERSION.dup) >= Gem::Version.create('1.9.3')
+gem 'mongoid', '~>4.0' if Gem::Version.create(RUBY_VERSION.dup) >= Gem::Version.create('1.9.3')
 gem 'sequel'
-gem 'mongo_mapper', '~> 0.13'
-gem 'bson_ext',                          :platforms => :ruby
 
 gemspec :path => "../"

gemfiles/rails_4.0_bson1.gemfile

@@ -0,0 +1,14 @@
+source "https://rubygems.org"
+
+gem "sqlite3",                          :platforms => :ruby
+gem "coveralls"
+gem 'rubysl',                           :platforms => :rbx
+gem 'rubinius-developer_tools',         :platforms => :rbx
+gem "jruby-openssl",                    :platforms => :jruby
+gem "activerecord-jdbcsqlite3-adapter", :platforms => :jruby
+gem "rails", "4.0.13"
+gem 'sequel'
+gem 'mongo_mapper', '~>0.13'
+gem 'bson_ext',                          :platforms => :ruby
+
+gemspec :path => "../"

gemfiles/rails_4.1.gemfile

@@ -7,9 +7,7 @@ gem 'rubinius-developer_tools',         :platforms => :rbx
 gem "jruby-openssl",                    :platforms => :jruby
 gem "activerecord-jdbcsqlite3-adapter", :platforms => :jruby
 gem "rails", "4.1.9"
-gem 'mongoid' if Gem::Version.create(RUBY_VERSION.dup) >= Gem::Version.create('1.9.3')
+gem 'mongoid', '~>4.0' if Gem::Version.create(RUBY_VERSION.dup) >= Gem::Version.create('1.9.3')
 gem 'sequel'
-gem 'mongo_mapper', '~> 0.13'
-gem 'bson_ext',                          :platforms => :ruby
 
 gemspec :path => "../"

gemfiles/rails_4.1_bson1.gemfile

@@ -0,0 +1,14 @@
+source "https://rubygems.org"
+
+gem "sqlite3",                          :platforms => :ruby
+gem "coveralls"
+gem 'rubysl',                           :platforms => :rbx
+gem 'rubinius-developer_tools',         :platforms => :rbx
+gem "jruby-openssl",                    :platforms => :jruby
+gem "activerecord-jdbcsqlite3-adapter", :platforms => :jruby
+gem "rails", "4.1.9"
+gem 'sequel'
+gem 'mongo_mapper', '~> 0.13'
+gem 'bson_ext',                          :platforms => :ruby
+
+gemspec :path => "../"

gemfiles/rails_4.2.gemfile

@@ -7,9 +7,7 @@ gem 'rubinius-developer_tools',         :platforms => :rbx
 gem "jruby-openssl",                    :platforms => :jruby
 gem "activerecord-jdbcsqlite3-adapter", :platforms => :jruby
 gem "rails", "4.2.0"
-gem 'mongoid' if Gem::Version.create(RUBY_VERSION.dup) >= Gem::Version.create('1.9.3')
+gem 'mongoid', '~>4.0' if Gem::Version.create(RUBY_VERSION.dup) >= Gem::Version.create('1.9.3')
 gem 'sequel'
-gem 'mongo_mapper', '~> 0.13'
-gem 'bson_ext',                          :platforms => :ruby
 
 gemspec :path => "../"

gemfiles/rails_4.2_bson1.gemfile

@@ -0,0 +1,14 @@
+source "https://rubygems.org"
+
+gem "sqlite3",                          :platforms => :ruby
+gem "coveralls"
+gem 'rubysl',                           :platforms => :rbx
+gem 'rubinius-developer_tools',         :platforms => :rbx
+gem "jruby-openssl",                    :platforms => :jruby
+gem "activerecord-jdbcsqlite3-adapter", :platforms => :jruby
+gem "rails", "4.2.0"
+gem 'sequel'
+gem 'mongo_mapper'
+gem 'bson_ext',                          :platforms => :ruby
+
+gemspec :path => "../"