Rails 3 get Username by ID

How can I get the Username from an ID in Rails 3? In my view I call <%= blog.user_id %> for the ID, but how do I ge开发者_开发百科t the Name there?

The Controller is a scaffold default.

Make sure you define the association in your Blog model.

belongs_to :user

And then in your view your can use <%= blog.user.name %>

Generally you want to avoid long chains of dots like post.user.name. Try:

class Post < ActiveRecord::Base
  belongs_to :user
  delegate :name, :to => :user, :prefix => true
end

Then in your views you can call

@post.user_name

to get the users name. I thought I would throw this out there since its good habit I am trying to include in my code as well.

You should use <%= blog.user.name %> and have defined

belongs_to :user

in your Blog model. You should work with ..._id on the view-level.

you should learn how to code in Rails, this is a very basic question.

Consider having a look at http://railsforzombies.org

It's a great online tutorial

Try using <%= blog.user.try(:name) %>