thr3ads.net - Rails - push_with_attributes for a has_many

If this information is useful, please help other people find it:
Share via:
Thufir
2008-Jan-02 09:41 UTC
push_with_attributes for a has_many_through

I''m basing feeds/show.rhtml and feeds_controller.rb on 

Chapter 12 - More Model Magic
Ruby on Rails For Dummies
by Barry Burd 
John Wiley & Sons © 2007

specifically listings 12-12 and 12-14.  Of course, it''s now deprecated
:(

There''s a has_many_through between the "feeds" and
"tags" tables.  The
join table is "colors", for lack of a better name.  I believe that the
name of the join table and that it''s a has_many_through are causing the
error message.

I have a screen shot at http://code.google.com/p/strawr/ , just click on 
the add_a_tag.png.  Up to that point, everything works. However, when I 
click on the button I get the following error:

 NoMethodError in FeedsController#add_some_tags

undefined method `push_with_attributes'' for Tag:Class

RAILS_ROOT: ./script/../config/..
Application Trace | Framework Trace | Full Trace

/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
base.rb:1238:in `method_missing''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
associations/has_many_through_association.rb:120:in `send''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
associations/has_many_through_association.rb:120:in `method_missing''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
base.rb:946:in `with_scope''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
associations/has_many_through_association.rb:120:in `method_missing''
/home/thufir/Desktop/strawr/app/controllers/feeds_controller.rb:88:in 
`add_some_tags''
/home/thufir/Desktop/strawr/app/controllers/feeds_controller.rb:87:in 
`each''
/home/thufir/Desktop/strawr/app/controllers/feeds_controller.rb:87:in 
`add_some_tags''

/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
base.rb:1238:in `method_missing''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
associations/has_many_through_association.rb:120:in `send''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
associations/has_many_through_association.rb:120:in `method_missing''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
base.rb:946:in `with_scope''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
associations/has_many_through_association.rb:120:in `method_missing''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:1101:in `send''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:1101:in `perform_action_without_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
filters.rb:696:in `call_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
filters.rb:688:in `perform_action_without_benchmark''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
benchmarking.rb:66:in `perform_action_without_rescue''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
benchmarking.rb:66:in `perform_action_without_rescue''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
rescue.rb:83:in `perform_action''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:435:in `send''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:435:in `process_without_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
filters.rb:684:in `process_without_session_management_support''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
session_management.rb:114:in `process''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:334:in `process''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/dispatcher.rb:41:in
`dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:113:in 
`handle_dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:79:in 
`service''
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start''
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start''
/usr/lib/ruby/1.8/webrick/server.rb:92:in `each''
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start''
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start''
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:63:in 
`dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/servers/webrick.rb:59
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in 
`gem_original_require''
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/
dependencies.rb:495:in `require''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/
dependencies.rb:342:in `new_constants_in''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/
dependencies.rb:495:in `require''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/server.rb:39
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in 
`gem_original_require''
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require''
script/server:3

/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
base.rb:1238:in `method_missing''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
associations/has_many_through_association.rb:120:in `send''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
associations/has_many_through_association.rb:120:in `method_missing''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
base.rb:946:in `with_scope''
/usr/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
associations/has_many_through_association.rb:120:in `method_missing''
/home/thufir/Desktop/strawr/app/controllers/feeds_controller.rb:88:in 
`add_some_tags''
/home/thufir/Desktop/strawr/app/controllers/feeds_controller.rb:87:in 
`each''
/home/thufir/Desktop/strawr/app/controllers/feeds_controller.rb:87:in 
`add_some_tags''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:1101:in `send''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:1101:in `perform_action_without_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
filters.rb:696:in `call_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
filters.rb:688:in `perform_action_without_benchmark''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
benchmarking.rb:66:in `perform_action_without_rescue''
/usr/lib/ruby/1.8/benchmark.rb:293:in `measure''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
benchmarking.rb:66:in `perform_action_without_rescue''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
rescue.rb:83:in `perform_action''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:435:in `send''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:435:in `process_without_filters''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
filters.rb:684:in `process_without_session_management_support''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
session_management.rb:114:in `process''
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.5/lib/action_controller/
base.rb:334:in `process''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/dispatcher.rb:41:in
`dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:113:in 
`handle_dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:79:in 
`service''
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service''
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run''
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread''
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start''
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread''
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start''
/usr/lib/ruby/1.8/webrick/server.rb:92:in `each''
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start''
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start''
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/webrick_server.rb:63:in 
`dispatch''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/servers/webrick.rb:59
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in 
`gem_original_require''
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/
dependencies.rb:495:in `require''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/
dependencies.rb:342:in `new_constants_in''
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/active_support/
dependencies.rb:495:in `require''
/usr/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/server.rb:39
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in 
`gem_original_require''
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require''
script/server:3

Request

Parameters: {"tag1"=>{"checked"=>"0"},
"commit"=>"Save changes", "tag2"=>
{"checked"=>"0"},
"tag3"=>{"checked"=>"1"},
"id"=>"4"}

Show session dump

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


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




The relevant code:


thufir@arrakis ~/Desktop/strawr $ 
thufir@arrakis ~/Desktop/strawr $ cat app/controllers/feeds_controller.rb 
class FeedsController < ApplicationController
  def index
    list
    render :action => ''list''
  end

  # GETs should be safe (see http://www.w3.org/2001/tag/doc/
whenToUseGet.html)
  verify :method => :post, :only => [ :destroy, :create, :update ],
         :redirect_to => { :action => :list }

  def list
    @feed_pages, @feeds = paginate :feeds, :per_page => 10
  end

  def show
    @feed = Feed.find(params[:id])
  end

  def new
    @feed = Feed.new
    @tag = Tag.find_all
  end

  def create
    @feed = Feed.new(params[:feed])
    if @feed.save
      flash[:notice] = ''Feed was successfully created.''
      redirect_to :action => ''list''
    else
      render :action => ''new''
    end
  end

  def edit
    @feed = Feed.find(params[:id])
    @tag = Tag.find_all
  end

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

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

#courtesy of Listing 12-12
#of Ruby on Rails For Dummies

def remove_tag
  @feed = Feed.find(params[:id])
  @feed.tags.delete(
    Tag.find(params[:which_tag]))

  if @feed.save
    flash[:notice] = ''Tag has been removed.''
  end
  redirect_to :action => ''show'', :id => @feed
end

def add_tag
  @feed = Feed.find(params[:id])
  @feed.tags.push_with_attributes(
    Tag.find(params[:tag][:id]))

  if @feed.save
    flash[:notice] = ''Tag has been added!''
  end
  redirect_to :action => ''show'', :id => params[:id]
end

def add_some_tags
  @feed = Feed.find(params[:id])
  @unused_tags     Tag.find(:all) - @feed.tags

  if @unused_tags.any?
    @tags_to_add = @unused_tags.select { |tag|
      (@params[''tag''+tag.id.to_s][''checked'']
== ''1'')}
    @tags_to_add.each { |tag|
      @feed.tags.push_with_attributes(tag)}
  end

  if @tags_to_add.any? and @feed.save
    flash[:notice] = ''Tags have been added!''
  end
  redirect_to :action => ''show'', :id => @feed
end

end
thufir@arrakis ~/Desktop/strawr $ 
thufir@arrakis ~/Desktop/strawr $ cat app/views/feeds/show.rhtml 
<% for column in Feed.content_columns %>
<p>
  <b><%= column.human_name %>:</b> <%=h
@feed.send(column.name) %>
</p>
<% end %>

<%= link_to ''Edit'', :action => ''edit'',
:id => @feed %> |
<%= link_to ''Back'', :action => ''list''
%>







<% for column in Feed.content_columns %>
<p>
  <b><%= column.human_name %>:</b>
  <%=h @feed.send(column.name) %>
</p>
<% end %>

<b>Tags:</b><br>

<% if @feed.tags.empty? %>
    (None)<p>
<% else %>
  <% for tag in @feed.tags %>
    <%= tag.name %>&nbsp;
    <%= link_to ''Remove'', { :action =>
''remove_tag'',
    :id => @feed, :which_tag => tag.id },
    :confirm => ''Are you sure?'', :post => true %>
    <br />
  <% end %>
<% end %>

<% @unused_tags      Tag.find(:all) - @feed.tags %>

<% if @unused_tags.any?  %>

  <%= form_tag :action => "add_some_tags",
               :id => @feed %>
    <b>Add a tag:</b><br>
    <% @unused_tags.each {|tag| %>
      <%= check_box(''tag''+tag.id.to_s,
''checked'') +
         tag.tag %><br/>
    <% } %>
    <%= submit_tag %>
  <%= end_form_tag %>
<% end %><p>


<%= link_to ''Edit'', :action => ''edit'',
:id => @feed %> |
<%= link_to ''Back'', :action => ''list''
%>

thufir@arrakis ~/Desktop/strawr $ 



thanks,

Thufir


--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---
Rails - Jan 2008 - push_with_attributes for a has_many_through

push_with_attributes for a has_many_through
