Hi,
i am very new to ROR, this is my 2nd day since i solve the problem of
database connection. when i started to write some codes, i got stuck.
here is the situation and please give me some help.
i have a “posts” table in my database
CREATE TABLE mapapp
.posts
(
id
int(11) NOT NULL auto_increment,
title
varchar(255) default NULL,
body
text,
PRIMARY KEY (id
)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
i have an empty “post.rb” in my Models which looks like this:
class Post < ActiveRecord::Base
end
i wrote an action in my controller which looks like this:
def testing
@posts = Post
for p in @posts
render :text => p.id
end
end
when i run this action on the browser, it gives me this error message:
NoMethodError in PlcController#testing
undefined method `each’ for Post:Class
RAILS_ROOT: ./script/…/config/…
Application Trace | Framework Trace | Full Trace
C:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/
base.rb:1235:in method_missing' #{RAILS_ROOT}/app/controllers/plc_controller.rb:40:in
testing’
C:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/
base.rb:1235:in method_missing' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ base.rb:1095:in
send’
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:in
call_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:in
perform_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:in
perform_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:in
send’
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:in
process_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:in
process’
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:in
handle_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:in
service’
C:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in run' C:/ruby/lib/ruby/1.8/webrick/server.rb:173:in
start_thread’
C:/ruby/lib/ruby/1.8/webrick/server.rb:162:in start' C:/ruby/lib/ruby/1.8/webrick/server.rb:162:in
start_thread’
C:/ruby/lib/ruby/1.8/webrick/server.rb:95:in start' C:/ruby/lib/ruby/1.8/webrick/server.rb:92:in
each’
C:/ruby/lib/ruby/1.8/webrick/server.rb:92:in start' C:/ruby/lib/ruby/1.8/webrick/server.rb:23:in
start’
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:in
dispatch’
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:in
require’
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:in
new_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:in
gem_original_require’
C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
require' script/server:3 C:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/ base.rb:1235:in
method_missing’
#{RAILS_ROOT}/app/controllers/plc_controller.rb:40:in testing' C:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ base.rb:1095:in
send’
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:in
call_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:in
perform_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:in
perform_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:in
send’
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:in
process_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:in
process’
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:in
handle_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:in
service’
C:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in run' C:/ruby/lib/ruby/1.8/webrick/server.rb:173:in
start_thread’
C:/ruby/lib/ruby/1.8/webrick/server.rb:162:in start' C:/ruby/lib/ruby/1.8/webrick/server.rb:162:in
start_thread’
C:/ruby/lib/ruby/1.8/webrick/server.rb:95:in start' C:/ruby/lib/ruby/1.8/webrick/server.rb:92:in
each’
C:/ruby/lib/ruby/1.8/webrick/server.rb:92:in start' C:/ruby/lib/ruby/1.8/webrick/server.rb:23:in
start’
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:in
dispatch’
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:in
require’
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:in
new_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:in
gem_original_require’
C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require’
script/server:3
i m very new, so please excuse me if i asked stupid questions.
but thanks for you time looking.