Help, 1 error(s) on assignment of multiparameter attributes

Hi everyone!

I just started learning Ruby on Rails about a week ago for a school
project, and can’t seem to find a solution for something.

I have this inside the form inside of edit_albums.rhtml:
<%= start_form_tag :action=>‘proccess_edit_album’, :id=>@album.id %>

Release Date: <%= datetime_select(:album, :release_date, :start_year
=> 1960) %>

and inside the controller:
def edit_album
@album = Album.find(params[‘id’])
end

def proccess_edit_album
@album = Album.find(params[:id])
@album.update_attributes(params[:album])
if 1
redirect_to :action=> ‘list_albums’
else
render :action => ‘edit_album’, :id=>params[‘id’]
end
end

but it gives me an error message, i dont get why, and i can’t seem to
find a fix to it.

Can anyone help me? I’ll appreciate it! :wink:

Hi Trukin,

not an expert, but copy-pasting your error message might help.

Elise

full trace:

c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/
base.rb:2094:in execute_callstack_for_multiparameter_attributes' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/ base.rb:2074:inassign_multiparameter_attributes’
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/
base.rb:1675:in attributes=' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/ base.rb:1591:inupdate_attributes’
#{RAILS_ROOT}/app/controllers/public_controller.rb:34:in
proccess_edit_album' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ base.rb:1095:insend’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
base.rb:1095:in perform_action_without_filters' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ filters.rb:632:incall_filter’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
filters.rb:619:in perform_action_without_benchmark' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ benchmarking.rb:66:inperform_action_without_rescue’
c:/ruby/lib/ruby/1.8/benchmark.rb:293:in measure' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ benchmarking.rb:66:inperform_action_without_rescue’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
rescue.rb:83:in perform_action' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ base.rb:430:insend’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
base.rb:430:in process_without_filters' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ filters.rb:624:inprocess_without_session_management_support’
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
session_management.rb:114:in process' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ base.rb:330:inprocess’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in
dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb: 113:inhandle_dispatch’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:79:in
service' c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:inservice’
c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in run' c:/ruby/lib/ruby/1.8/webrick/server.rb:173:instart_thread’
c:/ruby/lib/ruby/1.8/webrick/server.rb:162:in start' c:/ruby/lib/ruby/1.8/webrick/server.rb:162:instart_thread’
c:/ruby/lib/ruby/1.8/webrick/server.rb:95:in start' c:/ruby/lib/ruby/1.8/webrick/server.rb:92:ineach’
c:/ruby/lib/ruby/1.8/webrick/server.rb:92:in start' c:/ruby/lib/ruby/1.8/webrick/server.rb:23:instart’
c:/ruby/lib/ruby/1.8/webrick/server.rb:82:in start' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:63:indispatch’
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/
webrick.rb:59
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
gem_original_require' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:inrequire’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/
dependencies.rb:495:in require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ dependencies.rb:342:innew_constants_in’
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/
dependencies.rb:495:in require' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:ingem_original_require’
c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
require' script/server:3 -e:4:inload’
-e:4

Request

Parameters: {“commit”=>“Edit”, “id”=>“1”, “album”=>{“artist”=>“The
Beatles”, “title”=>“Abbey Road”, “release_date(1i)”=>“1969”,
“release_date(2i)”=>“1”, “release_date(3i)”=>“1”, “genre”=>“Rock”,
“release_date(4i)”=>“12”, “release_date(5i)”=>“00”}}

i commented the html tag inside the template:
Release Date: <%= datetime_select(:album, :release_date, :start_year
=> 1960) %>

to

1960) %>
-- > and now it works fine, i think it has to do something with the array passed within the POST, or maybe something else, im not sure, if anyone knows why, can you please explain me? Thanks

ActiveRecord::MultiparameterAssignmentErrors in
PublicController#proccess_edit_album

1 error(s) on assignment of multiparameter attributes

read it wrong .

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