What gotchas would be involved by using rake db:migrate to load vanilla SQL? The business requirements that I am working with don\'t allow me to use the default Rails\' migrations. But I still need
On my local machine I develop my Rails application using MySQL, but on deployment I am using Heroku which uses PostgreSQL. I am in need of creating a new data type, specifically I wish to call it long
I have an app that I\'m porting from PHP/symfony to Ruby/Rails. Though the language is changing, there is no need to modify the database (MySQL) in any way.
I only want to undo one migration file, something like rake db:rollback VERSION=$TIMESTAMP This command doesn\'t work. Any suggesti开发者_C百科on?rake db:migrate:down VERSION=$TIMESTAMP should do th
Does anyone know of a way to create a foreign key in Rails 3 using migrati开发者_如何学Goons?the foreigner gem works well for me.it adds a few methods to Rails migrations that allow easy foreign key c
Is the following correct? 开发者_Go百科 change_column :tablename, :fieldname, :limit => null If you previously specified a limit in a migration and want to just remove the limit, you can just do t
As I understand it the point of migrations is s开发者_StackOverflowo you can revert the database back to a known state during the last stages of development.
A couple of times I\'ve been in the situation where I\'ve wanted to refactor the design of some model and have ended up putting update logic in migrations. However, as far as I\'ve understood, this is
I am a beginner in Rails and I read that the Rails enforces the foreign key relationships at the model level and also at the databas开发者_C百科e level in the migration file, while creating the table.
What\'s the syntax for dropping a data开发者_Go百科base table column through a Rails migration?remove_column :table_name, :column_name
加载中,请稍侯......