One-to-many associations. How to refer to associated model parameter through id

Question

class Project < ActiveRecord::Base
  belongs_to :user

class User < ActiveRecord::Base
  has_many :projects

Projects recieves user_id of one who created specific project.

ID is everything is known about User in Project.

I need to display name of the user, assigned to project, not only id integer of that user. I've tryed to hardcode it like this:

def assigned_user
  User.where(:id == @project.user_id).name
end

Answer 1

您可以通过以下方式访问用户，您不需要为此显式运行查询。

@project.user

Answer 2

If you are trying to display it in the view say index.html.erb ,then i simply do this

#projects_controller.rb

def index

@projects = Project.all

end

Then in the view

#index.html.erb
@projects.each do |project|

<%= project.user.name if user.name.present? %>

<%end%>

Answer 3

如果关系正常，那么很容易：

<%= @project.user.try(:name) %>