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Ruby Build a Simple Ruby on Rails Application Customizing Forms Getting the Latest Changes

NoMethodError

NoMethodError in Statuses#new Showing C:/.../views/statuses/_form.html.erb where line #16 raised:

undefined method `Name' for #<Status:0x261b1d8> Extracted source (around line #16): 13 14 15 16 17 18 19

 <div class="field">
   <%= f.label :Name %><br>
   <%= f.text_field :Name %>
 </div>
 <div class="field">
   <%= f.label :content %><br>

Trace of template inclusion: app/views/statuses/new.html.erb

I'm assuming I accidentally deleted something? Any ideas?

Thanks =)

Maxim Kontsevitch
Maxim Kontsevitch
25,447 Points

Hey chad, can you show me a link to your whole project via github? Thank in advance

Thanks =)

5 Answers

Maxim Kontsevitch
Maxim Kontsevitch
25,447 Points

Try to write in your cmd: ``` rake db:migrate

Then try to change 
Name to
 name

Tell me if that helps :smiley:

Thanks for the quick response. Unfortunately the problem still persists after completing the above instructions.

Maxim Kontsevitch
Maxim Kontsevitch
25,447 Points

Can you please copy the output that shows on your cmd screen after you run rake db:migrate? Is there any output at all? If there isn't then try to run `rake db:migrate RAILS_ENV =development And show the output of that command/

Tell me if that helps. :smiley:

There was no output for rake db: migrate. The output for rake db:migrate RAILS_ENV =development is:

rake db:migrate RAILS_ENV =development is "rake aborted. Don't know how to build task "RAILS_ENV". I then tried typing rake db:migrate RAILS_ENV=development (without the space between the equal symbol and "development") and there was no feedback.

Maxim Kontsevitch
Maxim Kontsevitch
25,447 Points

That means your database is set. Try now and tell me how is it now.

Hmm, nothing was changed. I'm still receiving the error for "name" being an undefined method. I deleted the reference to "name" in "_form.html.erb", "index.html.erb" and "show.html.erb" and the problem went away. Does that provide any relevant clues?

To be more specific from the "_form.html.erb" file I deleted:

<div class="field"> <%= f.label :name %><br> <%= f.text_field :name %> </div>

From both the "index.html.erb" and "show.html.erb" files I deleted:

    <p><%= status.content %></p>

Those were the references when deleted they allowed the application to work "properly."

Maxim Kontsevitch
Maxim Kontsevitch
25,447 Points

Try to add in your app/models/status.rb:

belongs_to :name ```

Then try to return the reference to "name".

Does that give you any issue?

Great, that fixed the problem. Now a NameError occurs whenever I edit/update or create a status.

The First Error

NameError in StatusesController#create uninitialized constant Status::Name

Extracted source (around line #27): 25 26 27 28 29 30

# POST /statuses.json def create @status = Status.new(status_params)

respond_to do |format|
  if @status.save

Rails.root: C:/Users/.../treebook

Application Trace | Framework Trace | Full Trace app/controllers/statuses_controller.rb:27:in `create' Request

Parameters:

{"utf8"=>"?", "authenticity_token"=>"jtmv+so7KiX6x3YgfHoyCLuiL9SVNCRzZHIxRRDN8L8=", "status"=>{"name"=>"asdf", "content"=>"asdf"}, "commit"=>"Create Status"}

The Second Error

NameError in StatusesController#update uninitialized constant Status::Name

Extracted source (around line #44): 42 43 44 45 46 47

def update respond_to do |format| if @status.update(status_params) format.html { redirect_to @status, notice: 'Status was successfully updated.' } format.json { head :no_content } else

Rails.root: C:/Users/.../treebook

Application Trace | Framework Trace | Full Trace app/controllers/statuses_controller.rb:44:in block in update' app/controllers/statuses_controller.rb:43:inupdate' Request

Parameters:

{"utf8"=>"?", "_method"=>"patch", "authenticity_token"=>"jtmv+so7KiX6x3YgfHoyCLuiL9SVNCRzZHIxRRDN8L8=", "status"=>{"name"=>"", "content"=>"hello"}, "commit"=>"Update Status", "id"=>"7"}

I followed along the instructions from the video and even re watched most of them. How does something go wrong like this?

Having the same problem! Could you please share the results over here if you figure out how to do it? Thanks for any hints!!

I'm confused because in my db>migrate directory I don't have the file 20140220055902_add_devise_to_users.rb instead I have 20140517063951_add_user_id_to_statuses.rb, 20140515084220_create_statuses.rb, and 20140517044837_devise_create_users.rb.

Maxim Kontsevitch
Maxim Kontsevitch
25,447 Points

Chad You don't have that file because that file is from the "Adding the authentication system" Stage.

Hope that helps

OK, so I backtracked a little bit and discovered I hadn't added "attr_accessible :content, :user_id" to the app\models\status.rb as instructed during the Simple Forms installation. The reason I didn't install it is because I was receiving an error having to do with the "attr_accessible". I then added "gem 'protected_attributes'" to my gem files, ran "bundle installβ€œ in the console and the error disappeared.

Maxim Kontsevitch
Maxim Kontsevitch
25,447 Points

Great, happy you solved it. :zap: Note: if you will use rails 3.2.6 you would not have any problems with protected attributes.