Load db/schema_cache.dump duaring boot time.

3 files changed, 18 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
index c6af682d28..3cc714040d 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
@@ -86,6 +86,11 @@ module ActiveRecord
         end
       end
 
+      def schema_cache=(cache)
+        cache.connection = self
+        @schema_cache = cache
+      end
+
       def expire
         @in_use = false
       end
diff --git a/activerecord/lib/active_record/connection_adapters/schema_cache.rb b/activerecord/lib/active_record/connection_adapters/schema_cache.rb
index cd8c5844a4..53fa404305 100644
--- a/activerecord/lib/active_record/connection_adapters/schema_cache.rb
+++ b/activerecord/lib/active_record/connection_adapters/schema_cache.rb
@@ -2,7 +2,7 @@ module ActiveRecord
   module ConnectionAdapters
     class SchemaCache
       attr_reader :columns, :columns_hash, :primary_keys, :tables
-      attr_reader :connection
+      attr_accessor :connection
 
       def initialize(conn)
         @connection = conn
diff --git a/activerecord/lib/active_record/railtie.rb b/activerecord/lib/active_record/railtie.rb
index 058dd58efb..c287356a7b 100644
--- a/activerecord/lib/active_record/railtie.rb
+++ b/activerecord/lib/active_record/railtie.rb
@@ -107,7 +107,7 @@ module ActiveRecord
       config.watchable_files.concat ["#{app.root}/db/schema.rb", "#{app.root}/db/structure.sql"]
     end
 
-    config.after_initialize do
+    config.after_initialize do |app|
       ActiveSupport.on_load(:active_record) do
         ActiveRecord::Base.instantiate_observers
 
@@ -115,6 +115,17 @@ module ActiveRecord
           ActiveRecord::Base.instantiate_observers
         end
       end
+
+      ActiveSupport.on_load(:active_record) do
+        if app.config.use_schema_cache_dump
+          filename = File.join(app.config.paths["db"].first, "schema_cache.dump")
+          if File.file?(filename)
+            cache = Marshal.load(open(filename, 'rb') { |f| f.read })
+            ActiveRecord::Base.connection.schema_cache = cache
+          end
+        end
+      end
+
     end
   end
 end