Merge pull request #2301 from andynu/lazy-load-type-mappings-patch

Lazy load type mappings

lib/active_record/connection_adapters/oracle_enhanced_adapter.rb

@@ -459,6 +459,11 @@ def reconnect! # :nodoc:
         @logger.warn "#{adapter_name} automatic reconnection failed: #{e.message}" if @logger
       end
 
+      def clear_cache!(*args, **kwargs)
+        super
+        self.class.clear_type_map!
+      end
+
       def reset!
         clear_cache!
         super
@@ -697,6 +702,15 @@ def check_version
       end
 
       class << self
+        def type_map
+          @type_map ||= Type::TypeMap.new.tap { |m| initialize_type_map(m) }
+          @type_map
+        end
+
+        def clear_type_map!
+          @type_map = nil
+        end
+
         private
           def initialize_type_map(m)
             super
@@ -730,10 +744,8 @@ def initialize_type_map(m)
           end
       end
 
-      TYPE_MAP = Type::TypeMap.new.tap { |m| initialize_type_map(m) }
-
       def type_map
-        TYPE_MAP
+        self.class.type_map
       end
 
       def extract_value_from_default(default)

spec/active_record/oracle_enhanced/type/integer_spec.rb

@@ -87,5 +87,13 @@ class ::Test2Employee < ActiveRecord::Base
       create_employee2
       expect(@employee2.is_manager).to be_a(Integer)
     end
+
+    it "should return Integer value from NUMBER(1) column if emulate_booleans is set to false" do
+      ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter.emulate_booleans = false
+      ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter.clear_type_map!
+      ActiveRecord::Base.clear_cache!
+      create_employee2
+      expect(@employee2.is_manager).to be_a(Integer)
+    end
   end
 end