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Asked: 2026-05-10T19:19:57+00:00

I’ve got a unfinished project that a developer just didn’t finish and didn’t leave

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I’ve got a unfinished project that a developer just didn’t finish and didn’t leave any documentation about the installation process. I’ve downloaded the production directory to my windows machine (running InstantRails 2), I created the databases as required in the database.yml and I tried to run the rake:db:migrate --trace but I’m receiving the following error message:

(in D:/projects/broke2) ** Invoke db:migrate (first_time) ** Invoke environment (first_time) ** Execute environment ** Execute db:migrate rake aborted! uninitialized constant Admin D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:279:in `load_missing_constant' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:468:in `const_missing' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:480:in `const_missing' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/inflector.rb:285:in `constantize' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/inflector.rb:284:in `each' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/inflector.rb:284:in `constantize' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/core_ext/string/inflections.rb:143:in `constantize' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/migration.rb:481:in `migrations' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/connection_adapters/mysql_adapter.rb:15:in `inject' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/migration.rb:465:in `each' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/migration.rb:465:in `inject' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/migration.rb:465:in `migrations' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/migration.rb:431:in `migrate' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/migration.rb:373:in `up' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.1/lib/active_record/migration.rb:356:in `migrate' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/tasks/databases.rake:99 D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in `call' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:617:in `execute' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in `each' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:612:in `execute' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:578:in `invoke_with_call_chain' D:/InstantRails-2.0-win/ruby/lib/ruby/1.8/monitor.rb:242:in `synchronize' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:571:in `invoke_with_call_chain' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:564:in `invoke' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2019:in `invoke_task' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `each' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1997:in `top_level' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_exception_handling' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1991:in `top_level' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1970:in `run' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:2036:in `standard_exception_handling' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake.rb:1967:in `run' D:/InstantRails-2.0-win/ruby/lib/ruby/gems/1.8/gems/rake-0.8.3/bin/rake:31 D:/InstantRails-2.0-win/ruby/bin/rake:19:in `load' D:/InstantRails-2.0-win/ruby/bin/rake:19

I’m a regular Rails developer (it’s not my first app) but I never saw this error and I don’t have a clue where to start to debug.

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1 Answer

  1. Sometimes Rails will throw this error if there’s a syntax error where Admin is defined.

    Try looking for admin.rb and make sure that it parses.

    Also, you may want to try running the migrations one at a time (rake db:migrate VERSION=1, etc.) to see if that helps you track down which migration causes the error, or if it is a problem simply booting the application.

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