* Little tweaks to rails default tasks to get it to work

tasks/improved_mysql_schema_dumper_tasks.rake

@@ -11,6 +11,8 @@ end
 
 remove_task "db:schema:dump"
 remove_task "db:schema:load"
+remove_task "db:structure:dump"
+remove_task "db:test:clone_structure"
 
 namespace :db do
   namespace :schema do
@@ -27,4 +29,78 @@ namespace :db do
       ActiveRecord::SchemaDumper.load(file)
     end
   end
+
+  namespace :structure do
+    desc "Dump the database structure to a SQL file"
+    task :dump => :environment do
+      abcs = ActiveRecord::Base.configurations
+      case abcs[RAILS_ENV]["adapter"]
+      when "mysql"
+        ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, "db/#{RAILS_ENV}_structure.sql")
+      when "oci", "oracle"
+        ActiveRecord::Base.establish_connection(abcs[RAILS_ENV])
+        File.open("db/#{RAILS_ENV}_structure.sql", "w+") { |f| f << ActiveRecord::Base.connection.structure_dump }
+      when "postgresql"
+        ENV['PGHOST']     = abcs[RAILS_ENV]["host"] if abcs[RAILS_ENV]["host"]
+        ENV['PGPORT']     = abcs[RAILS_ENV]["port"].to_s if abcs[RAILS_ENV]["port"]
+        ENV['PGPASSWORD'] = abcs[RAILS_ENV]["password"].to_s if abcs[RAILS_ENV]["password"]
+        search_path = abcs[RAILS_ENV]["schema_search_path"]
+        search_path = "--schema=#{search_path}" if search_path
+        `pg_dump -i -U "#{abcs[RAILS_ENV]["username"]}" -s -x -O -f db/#{RAILS_ENV}_structure.sql #{search_path} #{abcs[RAILS_ENV]["database"]}`
+        raise "Error dumping database" if $?.exitstatus == 1
+      when "sqlite", "sqlite3"
+        dbfile = abcs[RAILS_ENV]["database"] || abcs[RAILS_ENV]["dbfile"]
+        `#{abcs[RAILS_ENV]["adapter"]} #{dbfile} .schema > db/#{RAILS_ENV}_structure.sql`
+      when "sqlserver"
+        `scptxfr /s #{abcs[RAILS_ENV]["host"]} /d #{abcs[RAILS_ENV]["database"]} /I /f db\\#{RAILS_ENV}_structure.sql /q /A /r`
+        `scptxfr /s #{abcs[RAILS_ENV]["host"]} /d #{abcs[RAILS_ENV]["database"]} /I /F db\ /q /A /r`
+      when "firebird"
+        set_firebird_env(abcs[RAILS_ENV])
+        db_string = firebird_db_string(abcs[RAILS_ENV])
+        sh "isql -a #{db_string} > db/#{RAILS_ENV}_structure.sql"
+      else
+        raise "Task not supported by '#{abcs["test"]["adapter"]}'"
+      end
+
+      if ActiveRecord::Base.connection.supports_migrations?
+        File.open("db/#{RAILS_ENV}_structure.sql", "a") { |f| f << ActiveRecord::Base.connection.dump_schema_information }
+      end
+    end
+  end
+
+  namespace :test do
+    remove_task "clone_structure"
+    desc "Recreate the test databases from the development structure"
+    task :clone_structure => [ "db:structure:dump", "db:test:purge" ] do
+      abcs = ActiveRecord::Base.configurations
+      case abcs["test"]["adapter"]
+      when "mysql"
+        ActiveRecord::Base.establish_connection(:test)
+        IO.read("db/#{RAILS_ENV}_structure.sql").split(";").each do |table|
+          ActiveRecord::Base.connection.execute(table)
+        end
+      when "postgresql"
+        ENV['PGHOST']     = abcs["test"]["host"] if abcs["test"]["host"]
+        ENV['PGPORT']     = abcs["test"]["port"].to_s if abcs["test"]["port"]
+        ENV['PGPASSWORD'] = abcs["test"]["password"].to_s if abcs["test"]["password"]
+        `psql -U "#{abcs["test"]["username"]}" -f db/#{RAILS_ENV}_structure.sql #{abcs["test"]["database"]}`
+      when "sqlite", "sqlite3"
+        dbfile = abcs["test"]["database"] || abcs["test"]["dbfile"]
+        `#{abcs["test"]["adapter"]} #{dbfile} < db/#{RAILS_ENV}_structure.sql`
+      when "sqlserver"
+        `osql -E -S #{abcs["test"]["host"]} -d #{abcs["test"]["database"]} -i db\\#{RAILS_ENV}_structure.sql`
+      when "oci", "oracle"
+        ActiveRecord::Base.establish_connection(:test)
+        IO.readlines("db/#{RAILS_ENV}_structure.sql").join.split(";\n\n").each do |ddl|
+          ActiveRecord::Base.connection.execute(ddl)
+        end
+      when "firebird"
+        set_firebird_env(abcs["test"])
+        db_string = firebird_db_string(abcs["test"])
+        sh "isql -i db/#{RAILS_ENV}_structure.sql #{db_string}"
+      else
+        raise "Task not supported by '#{abcs["test"]["adapter"]}'"
+      end
+    end
+  end
 end