Question

I´m trying to make a User – Infos association where my User has_many Infos.

I´m trying to call my User Infos on the index form from Users.

By calling <%= user.infos %> on my index.html.erb (Users) it returns me all datas from the Infos table like this:

[#<Info id: 2, name: "Thales Miguel", date: "1989-07-14", area: "An\xC3\xA1lise de Sistemas", comment: "Analista j\xC3\xBAnior de sistemas.", user_id: 1, created_at: "2012-01-16 15:54:29", updated_at: "2012-01-16 15:54:29">]

I assumed that by doing <%= user.infos.comment %> it would return me the “comment” from that user, but all I get is this error:

undefined method `comment' for #<ActiveRecord::Relation:0x3b8ebe8>

What am I doing wrong?

infos_controller:

class InfosController < ApplicationController

  def create
    @user = User.find(params[:user_id])
    @info = @user.infos.create(params[:info])
    redirect_to user_path(@user)
  end

  def destroy
    @user = User.find(params[:user_id])
    @info = @user.infos.find(params[:id])
    @info.destroy
    redirect_to user_path(@user)
  end

  def new
    @user = User.new
    @user.build_info    
end

end

info model:

class Info < ActiveRecord::Base
  belongs_to :user
end

user model:

class User < ActiveRecord::Base
  validates :login,    :presence => true
  validates :password, :presence => true,
                       :length   => {:minimum => 5}

  has_many :infos, :dependent => :destroy

end

Answer 1

This:

[#<Info id: 2, name: "Thales Miguel", date: "1989-07-14", area: "An\xC3\xA1lise de Sistemas", comment: "Analista j\xC3\xBAnior de sistemas.", user_id: 1, created_at: "2012-01-16 15:54:29", updated_at: "2012-01-16 15:54:29">]

is an array. You have to choose one of the objects. You can’t call an attribute value without selecting one of theses objects. Okay, in this case there is only one object but that doesn’t matter.