Enhanced Migrations Plugin Enhancement
2007-11-01
I recently hit upon the Enhanced Migrations plugin by Revolution on Rails. Works great when you develop on branches. The #dump_schema_information method of ActiveRecord::ConnectionAdapters::SchemaStatements only dumps the most recently migration file. Since each migration is now a separate entry in the migrations_info table, we can’t report only the latest one.
To this end, I generated the following diff:
1 $ svn diff vendor
2 Index: vendor/plugins/enhanced_migrations/lib/enhanced_migrations.rb
3 ===============
4-vendor/plugins/enhanced_migrations/lib/enhanced_migrations.rb (revision 7767)
5 + vendor/plugins/enhanced_migrations/lib/enhanced_migrations.rb (working copy)
6</span><span class="er">-58,8 +58,8</span><span class="er">
7
8 ActiveRecord::ConnectionAdapters::SchemaStatements.send(:define_method, :dump_schema_information) do
9 begin
10 – if (current_schema = ActiveRecord::Migrator.current_version) > 0
11 – return "INSERT INTO #{ActiveRecord::Migrator.schema_info_table_name} VALUES (#{current_schema}, NOW"
12 + select_all("SELECT * FROM #{ActiveRecord::Migrator.schema_info_table_name} ORDER BY created_at, id").map do |migration|
13 + "INSERT INTO #{ActiveRecord::Migrator.schema_info_table_name} VALUES;\n"
14 end
15 rescue ActiveRecord::StatementInvalid
16 # No Schema Info
Hope this is useful for other people.
