similar to: "uninitialized constant PostsController::Post"

I got a following error. NoMethodError in Book#new Showing /home/amrit/boook/app/views/book/_form.html.erb where line #1 raised: undefined method `model_name'' for NilClass:Class The content of _form.html.erb file are: <%= form_for(@post) do |f| %> <% if @post.errors.any? %> <div id="error_explanation"> <h2><%=

1) I installed the ruby-1.9.2-p0 and rubygems-1.3.7 in the (/usr/local/src directory ) 2) Then i installed rails from terminal by typing follwoing sudo gem install rails --include-dependencies 3) Then i made a rails applcation from terminal as rails new demo then cd demo ruby

I made a new rails app and when i started the server ,it gave following error message. => Booting Mongrel => Rails 2.3.8 application starting on http://0.0.0.0:3000 => Call with -d to detach => Ctrl-C to shutdown server Exiting /usr/lib/ruby/1.8/mongrel/tcphack.rb:12:in `initialize_without_backlog'': Address already in use - bind(2) (Errno::EADDRINUSE) from

Hey My app has some buttons and i have route all to different action in router.rb file but click on each button results in same action. why? Am i missing to specify anything...) Rails:3.0.7 Thanks in advance. -- 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

rails -v=2.3.8 gem -v= 1.4.2 ruby -v=1.8.7 When i issue the "rake" command ,it gives the following error . (in /home/amrit/amrit/OSV/OpenStreetView) /usr/bin/ruby1.8 -I"lib:test" "/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake/rake_test_loader.rb" "test/functional/main_controller_test.rb" "test/functional/upload_controller_test.rb"

Hi all We all know the model-controller-paradigm: I have a model "News" which has a corresponding CRUD-controller "NewsController". But now I''m quite unsure about the following... Guess we have normal visitors that visit our site www.??.com/news and we have administrators that create and modify news items. The admin should see an "Edit" link and a

When i start the server "rails s",following error message appears: => Booting WEBrick => Rails 3.0.7 application starting in development on http://0.0.0.0:3000 => Call with -d to detach => Ctrl-C to shutdown server Exiting /usr/lib/ruby/gems/1.8/gems/actionpack-3.0.7/lib/action_dispatch/routing/mapper.rb:167:in `default_controller_and_action'': missing :controller

I have three tables. users, posts, users_posts. This last one is to mark a post as read. How do I write to the users_post table? Here''s what I have: In model ''User_Post'' belongs_to :post belongs_to :user In post/view/show: <%= link_to "Mark As Read", :controller => ''post'', :action => ''post_read'', :user =>

Instead of the user entering a name, I want to pass their screen name along with supplied :title and :content fields. here is what I''ve got.. f.hidden_field :author, user.screen_name here is the create method from Posts controller: def create @title = "Gravity" @user = User.find(params[:id]) # this does not work, and I don''t know why if request.post?

why should i use mongrel_cluster in my rails application? What are its benefits for which i should install and configure it ? is webrick server not enough for rails application? Thanks -- 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

Hi. I''m trying to run Getting started tutorial under Rails 4.0.0.beta1 although it assumes it runs on Rails 3. I was able to get rid of all errors by wrapping post_params here and there, and installing protected_attributes Gem for attr_accessible to make sense. Post/ comment CRUD works just fine, but I don''t seem to be able to add Tags (the final part of the tutorial). Post saved

Hi, just found out small problem with Rails 2.1. If I run a "script/generate scaffold post title:string" that creates PostsController and later want to make admin controller for it by running "script/generate controller admin/posts", Rails complain that: "The name ''Admin::PostsHelper'' is either already used in your application or reserved by Ruby on

I''m trying to run some functional tests on Rails. However I am coming up with the following error. RuntimeError: Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id app/controllers/posts_controller.rb:11:in `create'' posts_controller_test.rb:5:in `test_should_create'' Here is my test file require

getting this error compile error /Users/bradwrage/webapps/blog/app/views/posts/index.html.erb:5: syntax error, unexpected ''='' ...w Goal", new_post_path, class="btn btn-success" );@output_bu... ^ /Users/bradwrage/webapps/blog/app/views/posts/index.html.erb:7: syntax error, unexpected kDO_BLOCK, expecting kEND ''); @posts.each

i am using rails -v 3.0.7.when i tried "rails generate scaffold try name:string number:decimal" , it gave following error message invoke active_record /usr/lib/ruby/1.8/yaml.rb:133:in `load'': syntax error on line 7, col 2: ` pool: 5'' (ArgumentError) from /usr/lib/ruby/1.8/yaml.rb:133:in `load'' from

Hello, I would like to have a link_to automatically populate a field in the form that it is linking to. For example (excuse my silly words, im trying to make a point) <%= link_to "Add a COOL Post", new_post_path, :howcoolisit => ''COOL'' %> <%= link_to "Add a NOTCOOL Post", new_post_path, :howcoolisit => ''NOTCOOL'' %> Then,

i am unable to download lustre 1.6.6 , links does seems to be broken but its not working -- Regards-- Rishi Pathak Pune-Maharastra -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.lustre.org/pipermail/lustre-discuss/attachments/20081222/e72e8bc2/attachment-0001.html

Dear R users I have a data set which has five variables. One depenedent variable y, and 4 Independent variables (education-level, householdincome, countrygdp and countrygdpsquare). The first two are data corresponding to the individual and the next two coorespond to the country to which the individual belongs to. My data set does not make this distinction between individual level and country

I''m having trouble finding then displaying all items in my "posts" table that match a certain search string. I have a from field: <%= start_form_tag :action=> "search" %> <div title="Search" id="searchform" class="form"> <h3>Search</h3> <%= error_messages_for ''post''

I have so far used the following command glm(formula = s ~ age + gender + gemedu + gemhinc + es_gdppc + imf_pop + estbbo_m, family = binomial(link = "probit")) My question is 1. How do i discard the non significant selection variables (one out of the seven variables above is non-significant) and calculate the Inverse Mills Ratio of the significant variables 2. I need the inverse