thr3ads.net - Rails - undefined method `updated_at'' for #<Classified:0x686c5e4> [Nov 2011]

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Rolando Sotomayor

2011-Nov-02 16:05 UTC

undefined method `updated_at'' for #<Classified:0x686c5e4>

HEllo, I have the following problem with rails, I am new in this...is
there anyone who explain to me what´s happens?
Thanks
See below:



NoMethodError in Classified#show
Showing app/views/classified/show.rhtml where line #17 raised:

undefined method `updated_at'' for #<Classified:0x686c5e4>

Extracted source (around line #17):

14:
15:     <strong>Date Posted:</strong>
<%distance_of_time_in_words_to_now(@classified.created_at) %> ago <br
/>
16:
17:     <strong>Last updated:</strong>
<%distance_of_time_in_words(@classified.updated_at, Time.now) %> ago
</p>
18:     <p><%= @classified.description %></p>
19:
20:     <hr/>



RAILS_ROOT: ./script/../config/..

Application Trace | Framework Trace | Full Trace
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1792:in
`method_missing''
#{RAILS_ROOT}/app/views/classified/show.rhtml:17:in


Request
Parameters: {"id"=>"19"}

Show session dump

---
flash: !map:ActionController::Flash::FlashHash {}


Response
Headers: {"cookie"=>[],
"Cache-Control"=>"no-cache"}

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Colin Law

2011-Nov-02 16:25 UTC

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Re: undefined method `updated_at'' for #<Classified:0x686c5e4>

On 2 November 2011 16:05, Rolando Sotomayor
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:> HEllo, I have the following problem with rails, I am new in this...is
> there anyone who explain to me what´s happens?
> Thanks
> See below:
>
>
>
> NoMethodError in Classified#show
> Showing app/views/classified/show.rhtml where line #17 raised:
>
> undefined method `updated_at'' for #<Classified:0x686c5e4>
Has the classifieds table got a column updated_at?  Show us the bit of
db/schema.rb for that table if you think it has.

Post the start of classified.rb showing the class definition and any
other stuff before the methods (if any).

Colin

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Rolando Sotomayor

2011-Nov-02 16:56 UTC

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Re: undefined method `updated_at'' for #<Classified:0x686c5e4>

I have these tables on my database with these fields each one:

->classifieds:(id,title,location,description,email,create_at,updated_at,category_id,content_type,picture)

->categories(id,name)

This is what I have in the followings files:
--------------------------------------------
->classified_controller.rb
class ClassifiedController < ApplicationController
  layout ''standard''

  def list
  @classifieds = Classified.find(:all)
  end

  def show
  @classified = Classified.find(params[:id])
  end

  def new
  @classified = Classified.new
  @categories = Category.find(:all)
  end

  def create
  @classified = Classified.new(params[:classified])
  @categories = Category.find(:all)
  if @classified.save
  redirect_to home_url
  else
  render :action => ''new''
  end
  end

  def edit
  @classified = Classified.find(params[:id])
  @categories = Category.find(:all)
  end

  def update
  @classified = Classified.find(params[:id])
  @categories = Category.find(:all)
  if @classified.update_attributes(params[:classified])
    flash[:notice] = ''Classified was successfully updated.''
    redirect_to :action => ''show'', :id => @classified
  else
    render :action => ''edit''
  end
  end

  def delete
  Classified.find(params[:id]).destroy
  redirect_to :action => ''list''
  end
end

-----------------
->category_controller.rb
class CategoryController < ApplicationController
    layout ''standard''

    def list
        @categories = Category.find(:all)
    end

    def show
        @category = Category.find(params[:id])
    end

    def new
        @category = Category.new(params[:category])
        if @category.save
        return if request.xhr?
        render :partial => ''category'', :object =>
@category
        end
    end

    def delete
        @category = Category.find(params[:id])
        @category.destroy
        return if request.xhr?
        render :nothing, :status => 200
    end
end
--------------------------------
-> app/views/classified/show.rhtml

<html>
  <head>
    <title>Mostrar items</title>
  </head>
  <body>
    <h1><%= @classified.title %></h1>
    <p><strong>Price: </strong> <%= 
number_to_currency(@classified.price)%> <br /><br />

    <% if not @classified.category.blank? %>
    <strong>Category: </strong> <%= link_to 
@classified.category.name,:controller => "category", :action => 
"show",:id => @classified.category.id %><br />
    <% end %>

    <strong>Location: </strong> <%= @classified.location %>
<br />

    <strong>Date Posted:</strong> <%= 
distance_of_time_in_words_to_now(@classified.created_at) %> ago <br />

    <strong>Last updated:</strong> <%= 
distance_of_time_in_words(@classified.updated_at, Time.now) %> ago </p>
    <p><%= @classified.description %></p>

    <hr/>

    <% unless @classified.picture.blank? %>
    <%= image_tag(url_for({:action => ''image'', :id =>
@classified.id}))
-%>
    <% end %>

    <p>Interested? <%= link_to_function(''Contact the 
seller'',"Element.show(''contact_seller'')")
%></p>

    <div id="contact_seller" style="display:none;">
    <%= form_remote_tag(:url => {:action =>
''contact'',:id =>
@classified.id },:html => {:id => "contact_form"}) -%>
    Your e-mail: <%= text_field "contact", "email"
-%><br />
    Message: <br />
    <%= text_area "contact", "message", {:rows => 10}
-%><br />
    <%= submit_tag ''Contact seller'' -%>

    <%= end_form_tag -%>
    </div>

    <%= link_to ''Back'', home_url %>
  </body>
</html>

-------------------------------------
-> app/models/classified.rb
class Classified < ActiveRecord::Base
  belongs_to :category
  validates_presence_of :title, :message => "cannot be blank. Make your 
title descriptive"
  validates_presence_of :price, :message => "must be a numeric, value 
(do not include a dollar sign)"
  validates_presence_of :location
  validates_presence_of :description
  validates_presence_of :email

  validates_numericality_of :price

  protected
  def validate
    errors.add(:price, "should be a positive value") if price.nil?|| 
price < 0.01
  end
  validates_format_of :email,:with => 
/^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i

  def pictureimg=(picture_field)
    return if picture_field.blank?
    self.content_type = picture_field.content_type.chomp
    self.picture = picture_field.read
  end
end
-------------------------
->db/migrate/001_create_classifieds.rb

class CreateClassifieds < ActiveRecord::Migration
  def self.up
    create_table :classifieds do |t|
      # t.column :name, :string
      t.column  :title, :string
      t.column  :price, :float
      t.column  :location,  :string
      t.column  :description, :text
      t.column  :email, :string
      t.column  :created_at,  :timestamp
      t.column  :updated_at,  :timestamp
    end
  end

  def self.down
    drop_table :classifieds
  end
end
-----------------------------------------
->db/migrate/002_create_categories.rb

class CreateCategories < ActiveRecord::Migration
  def self.up
    create_table :categories do |t|
      # t.column :name, :string
      t.column :name, :string
    end
    Category.create :name => "Electronics"
    Category.create :name => "Real Estate"
    Category.create :name => "Furniture"
    Category.create :name => "Miscellaneus"

    add_column :classifieds, :category_id, :integer
    Classified.find(:all).each do |c|
      c.update_attribute(:category_id, 4)
      end
  end

  def self.down
    drop_table :categories
  end
end
-----------------------------------

I hope this is enough
Thanks

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Colin Law

2011-Nov-02 17:22 UTC

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Re: Re: undefined method `updated_at'' for #<Classified:0x686c5e4>

On 2 November 2011 16:56, Rolando Sotomayor
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:> I have these tables on my database with these fields each one:
>
>
->classifieds:(id,title,location,description,email,create_at,updated_at,category_id,content_type,picture)
I presume you just typed that and have mistyped.  That is why I asked
for schema.rb.  Copy/paste in order to avoid typos.

What happens if you run the rails console and do
c = Classified.first
Does it show update_at

Colin

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Dave Aronson

2011-Nov-02 17:42 UTC

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Re: undefined method `updated_at'' for #<Classified:0x686c5e4>

On Wed, Nov 2, 2011 at 12:05, Rolando Sotomayor
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org> wrote:
> undefined method `updated_at'' for #<Classified:0x686c5e4>
If "updated_at" was a column you manually specified, I recommend you
rename it.  That name is used automagically by Rails behind the
scenes, so using it manually is asking for trouble.  That and
created_at are the timestamps added to any generated migration that
creates a new table.

Or are you actually trying to use the automagic one?  The details were
"tl;dr", but if you really need, I can slog through them....

-Dave

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