[api] fix the old migration the right way

See receipt 13 in http://pragprog.com/book/rr2/rails-recipes

src/api/db/migrate/20120407173644_remove_devel_project.rb

@@ -0,0 +1,18 @@
+class RemoveDevelProject < ActiveRecord::Migration
+  class DbPackage < ActiveRecord::Base; end
+  def up
+    packs = DbPackage.where("develproject_id is not null").all
+
+    unless packs.empty?
+      puts packs.inspect
+      raise "Migrate to 2.3 first and run ./script/migrate_devel_projects"
+    end
+
+    execute("alter table db_packages drop FOREIGN KEY db_packages_ibfk_2")
+    remove_column :db_packages, :develproject_id
+
+  end
+
+  def down
+  end
+end

src/api/db/structure.sql

@@ -959,6 +959,8 @@ INSERT INTO schema_migrations (version) VALUES ('20120319133739');
 
 INSERT INTO schema_migrations (version) VALUES ('20120320134850');
 
+INSERT INTO schema_migrations (version) VALUES ('20120407173644');
+
 INSERT INTO schema_migrations (version) VALUES ('20120411112931');
 
 INSERT INTO schema_migrations (version) VALUES ('20120411121152');
@@ -967,8 +969,6 @@ INSERT INTO schema_migrations (version) VALUES ('20120417115800');
 
 INSERT INTO schema_migrations (version) VALUES ('20120418121859');
 
-INSERT INTO schema_migrations (version) VALUES ('20120424141421');
-
 INSERT INTO schema_migrations (version) VALUES ('20120529150500');
 
 INSERT INTO schema_migrations (version) VALUES ('20120903122955');
@@ -981,8 +981,6 @@ INSERT INTO schema_migrations (version) VALUES ('20121014124846');
 
 INSERT INTO schema_migrations (version) VALUES ('20121015121807');
 
-INSERT INTO schema_migrations (version) VALUES ('20121031121807');
-
 INSERT INTO schema_migrations (version) VALUES ('21');
 
 INSERT INTO schema_migrations (version) VALUES ('22');