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between40and2/rails-console-migration-cheatsheet.md

Last active August 29, 2015 14:02
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You can do a lot of things in rails console. Here we just tip on migration part.
Raw
rails-console-migration-cheatsheet.md

How database/table related info

Account.table_name
Account.columns.collect {|x| x.name}

Change table structure

Even you can do rails g migration in cli, which is also persisted to share. Here is a quick and dirty way.

ActiveRecord::Migration.remove_column :framework_classes, :field123

See API: ActiveRecord::ConnectionAdapters::SchemaStatements

Show the data/content

Account.all

Operate on the data record

Reload!

You may need to reload the tables or models after change. But you may also find that there is no such method in ActiveRecord. The solution is to reload the console, by

> roload!

See Here

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