havenwood: i send before
```
rake db:migrate 1
rake aborted!
NoMethodError: undefined method `to_sym' for nil:NilClass
/home/cubix/.rvm/gems/ruby-2.7.2/gems/sequel-5.40.0/lib/sequel/database/connecting.rb:17:in `adapter_class'
/home/cubix/.rvm/gems/ruby-2.7.2/gems/sequel-5.40.0/lib/sequel/database/connecting.rb:36:in `connect'
/home/cubix/.rvm/gems/ruby-2.7.2/gems/sequel-5.40.0/lib/sequel/core.rb:124:in `connect'
/home/cubix/project/demo/Rakefile:14:in `block (2 levels) in <top (required)>'
/home/cubix/.rvm/gems/ruby-2.7.2/gems/rake-13.0.3/exe/rake:27:in `<top (required)>'
/home/cubix/.rvm/gems/ruby-2.7.2/bin/ruby_executable_hooks:22:in `eval'
/home/cubix/.rvm/gems/ruby-2.7.2/bin/ruby_executable_hooks:22:in `<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)
```