Adjusted to ActiveRecord > 4

activerecord-spatialite-adapter.gemspec

@@ -50,6 +50,6 @@
   s_.extra_rdoc_files = ::Dir.glob("*.rdoc")
   s_.test_files = ::Dir.glob("test/**/tc_*.rb")
   s_.platform = ::Gem::Platform::RUBY
-  s_.add_dependency('rgeo-activerecord', '~> 0.4.3')
+  s_.add_dependency('rgeo-activerecord', '~> 1.0.0')
   s_.add_dependency('sqlite3', '>= 1.3.5')
 end

lib/active_record/connection_adapters/spatialite_adapter.rb

@@ -76,10 +76,11 @@ def self.spatialite_connection(config_)
         raise "Cannot read libspatialite library at #{path_}"
       end
       unless path_
-        prefixes_ = ['/usr/local/spatialite', '/usr/local/libspatialite', '/usr/local', '/opt/local', '/sw/local', '/usr']
+        prefixes_ = ['/usr/local/spatialite/lib', '/usr/local/libspatialite/lib',
+                    '/usr/local/lib', '/opt/local/lib', '/sw/local/lib', '/usr/lib/x86_64-linux-gnu']
         suffixes_ = ['so', 'dylib'].join(',')
         prefixes_.each do |prefix_|
-          pa_ = ::Dir.glob("#{prefix_}/lib/libspatialite.{#{suffixes_}}")
+          pa_ = ::Dir.glob("#{prefix_}/libspatialite.{#{suffixes_}}")
           if pa_.size > 0
             path_ = pa_.first
             break

lib/active_record/connection_adapters/spatialite_adapter/spatial_column.rb

@@ -43,7 +43,7 @@ module ConnectionAdapters
     module SpatiaLiteAdapter
 
 
-      class SpatialColumn < ConnectionAdapters::SQLiteColumn
+      class SpatialColumn < ConnectionAdapters::SQLite3Column
 
 
         FACTORY_SETTINGS_CACHE = {}