Rails Best Practices

Throw in trash your IDE if it can't set a width of tab. When you use tab, it does no mather what width of tab set in IDE - in all cases all ident in code will have same width.

Kuzikov, that's true if and ONLY if, ALL lines use tabs instead of spaces. If any line uses spaces instead of tabs, it WILL be off from the tabified lines unless the IDE you're looking at it in, is configged the same way as that of the line's author. Tabs are evil Evil EVIL!

That said, though: throw in trash your IDE if it can't be set to automagically substitute spaces any time you press TAB! And throw in trash any developer who refuses to set his IDE that way....

I don't think this is a problem, rails_best_practices gem is showing it as error.
it says "Remove tab and use whitespace"
which is not acceptable and i think this doesn't fit under the best practices
So please remove it!

Magesh, if you don't like this practice, you can tell rails_best_practices gem just ignore it, please read the section Customize Configuration in the gem README, https://github.com/flyerhzm/rails_best_practices

It's very ugly when the same file has differents indent types.
A standard can be very usefull!

Textmate has this useful bundle for auto-replace tabs: https://github.com/glennr/uber-glory-tmbundle

for vim users:

set expandtab
set ai sw=2
set tabstop=2
set shiftwidth=2

then if you ever come across a file that has tab characters just run
:retab

and it converts it all to lovely whitespace (which IS the standard)