Ruby on Rails

Hello!

I'm an experienced programmer, who's starting to use Ruby on Rails for the first time. I need some documentation that JUST explains how variable names are manipulated. Things I need to understand:

• When Rails will automatically convert between CamelCase and snake_case  (like How does migrate know to break up Add_Foo_Bar_Baz_To_Buq as adding a FooBarBaz column to the Buq table, and what will it to with Add_Foo_To_Baz_To_Buq or Add_FooBarBaz_To_Buq?)
• When Rails will automatically convert between singular and plural
• What the correct (conventional) form is for variables/class names/DB tables columns/method names of various types
• Given a name of a given form, what kind of thing does RoR think it is and where is RoR looking for it?
• Stuff like that...
  

I don't need a book that explains how to write a program from scratch (I have a large one that I'm already working with). I don't need something that explains how Ruby works, I can learn the language on my own. I need a reference where I can look things up easily.

Also, if there is a better resource to ask this question, that would be great as well. There doesn't appear to be a Stack Exchange site for asking resource recommendation questions...

Thanks!