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amrit pal pathak

2011-Apr-30 15:40 UTC

"uninitialized constant PostsController::Post"

This time i read scaffold tutorial very  carefully and finally try to
generate a form without using the scaffold(just used a controller and
view ).what i have done till now ,is as follow.Using rails 3.0.7.

                                 "rails generate controller posts
index"

  1) post_controller.rb

  class PostsController < ApplicationController
  def index
  @post=Post.new
  end
  def create
  @post = Post.new(params[:post])
  respond_to do |format|
  end
  end
  end

2)index.html.erb

 <h1>Posts#index</h1>
<p>Find me in app/views/posts/index.html.erb</p>
<%= link_to ''New Post'', new_post_path%>
<%= form_for(@post) do |f| %>
 <div class="field">
    <%= f.label :name %><br />
    <%= f.text_field :name %>
  </div>
  <div class="field">
    <%= f.label :title %><br />
    <%= f.text_field :title %>
  </div>
  <div class="field">
    <%= f.label :content %><br />
    <%= f.text_area :content %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

                             i didnt create any model because i just
want to create a simple form first.so when i brower to "localhost:3000/
posts/index", it says

 "uninitialized constant PostsController::Post

Please somebody help to resolve it

Thanks






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Walter Davis

2011-Apr-30 15:50 UTC

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Re: "uninitialized constant PostsController::Post"

On Apr 30, 2011, at 11:40 AM, amrit pal pathak wrote:
> This time i read scaffold tutorial very  carefully and finally try to
> generate a form without using the scaffold(just used a controller and
> view ).what i have done till now ,is as follow.Using rails 3.0.7.
>
>                                 "rails generate controller posts
> index"
>
>  1) post_controller.rb
>
>  class PostsController < ApplicationController
>  def index
>  @post=Post.new
>  end
>  def create
>  @post = Post.new(params[:post])
>  respond_to do |format|
>  end
>  end
>  end
>
> 2)index.html.erb
>
> <h1>Posts#index</h1>
> <p>Find me in app/views/posts/index.html.erb</p>
> <%= link_to ''New Post'', new_post_path%>
> <%= form_for(@post) do |f| %>
> <div class="field">
>    <%= f.label :name %><br />
>    <%= f.text_field :name %>
>  </div>
>  <div class="field">
>    <%= f.label :title %><br />
>    <%= f.text_field :title %>
>  </div>
>  <div class="field">
>    <%= f.label :content %><br />
>    <%= f.text_area :content %>
>  </div>
>  <div class="actions">
>    <%= f.submit %>
>  </div>
> <% end %>
>
>                             i didnt create any model because i just
> want to create a simple form first.so when i brower to "localhost: 
> 3000/
> posts/index", it says
>
> "uninitialized constant PostsController::Post
>
> Please somebody help to resolve it
>
> Thanks
>
>
You must have a model if you''re going to call Post.new. That''s
where
that ''new'' method happens. The model tells the controller what
fields
it should initialize, which tells the view that the default values are  
whatever they are, etc. It''s MVC, not VC!

Walter
>
>
>
>
> -- 
> You received this message because you are subscribed to the Google  
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> .
>
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Colin Law

2011-Apr-30 16:08 UTC

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Re: "uninitialized constant PostsController::Post"

On 30 April 2011 16:40, amrit pal pathak
<amritpalpathak1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> This time i read scaffold tutorial very  carefully and finally try to
> generate a form without using the scaffold(just used a controller and
> view ).what i have done till now ,is as follow.Using rails 3.0.7.
>
>                                 "rails generate controller posts
> index"
>
>  1) post_controller.rb
>
>  class PostsController < ApplicationController
>  def index
>  @post=Post.new
Why are you making a post in the index action?  This action should
just be showing posts.
>  end
>  def create
>  @post = Post.new(params[:post])
>  respond_to do |format|
>  end
>  end
>  end
>
> 2)index.html.erb
>
>  <h1>Posts#index</h1>
> <p>Find me in app/views/posts/index.html.erb</p>
> <%= link_to ''New Post'', new_post_path%>
> <%= form_for(@post) do |f| %>
>  <div class="field">
>    <%= f.label :name %><br />
>    <%= f.text_field :name %>
>  </div>
>  <div class="field">
>    <%= f.label :title %><br />
>    <%= f.text_field :title %>
>  </div>
>  <div class="field">
>    <%= f.label :content %><br />
>    <%= f.text_area :content %>
>  </div>
>  <div class="actions">
>    <%= f.submit %>
>  </div>
> <% end %>
>
>                             i didnt create any model because i just
> want to create a simple form first.so when i brower to
"localhost:3000/
> posts/index", it says
>
>  "uninitialized constant PostsController::Post
You have not told us which line is failing, but I guess it is the one that says
@post=Post.new
which says make a new Post object, but since you have not written the
Post model how can it make a Post object?

You cannot make a form for an object without defining the model first.
 form_for( @post ) makes a form for the object @post.

Colin

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amrit pal pathak

2011-May-01 04:52 UTC

head link

Re: "uninitialized constant PostsController::Post"

On Apr 30, 12:08 pm, Colin Law
<clan...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
wrote:> On 30 April 2011 16:40, amrit pal pathak
<amritpalpath...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > This time i read scaffold tutorial very  carefully and finally try to
> > generate a form without using the scaffold(just used a controller and
> > view ).what i have done till now ,is as follow.Using rails 3.0.7.
>
> >                                 "rails generate controller posts
> > index"
>
> >  1) post_controller.rb
>
> >  class PostsController < ApplicationController
> >  def index
> >  @post=Post.new
>
> Why are you making a post in the index action?  This action should
> just be showing posts.           Yes Colin,this method was used for showing phosts.But this
is not a ard and fast rule that  it must be used for showing posts.I
just doing experiment ,so used it for creating .>
>
>
>
>
>
>
>
>
> >  end
> >  def create
> >  @post = Post.new(params[:post])
> >  respond_to do |format|
> >  end
> >  end
> >  end
>
> > 2)index.html.erb
>
> >  <h1>Posts#index</h1>
> > <p>Find me in app/views/posts/index.html.erb</p>
> > <%= link_to ''New Post'', new_post_path%>
> > <%= form_for(@post) do |f| %>
> >  <div class="field">
> >    <%= f.label :name %><br />
> >    <%= f.text_field :name %>
> >  </div>
> >  <div class="field">
> >    <%= f.label :title %><br />
> >    <%= f.text_field :title %>
> >  </div>
> >  <div class="field">
> >    <%= f.label :content %><br />
> >    <%= f.text_area :content %>
> >  </div>
> >  <div class="actions">
> >    <%= f.submit %>
> >  </div>
> > <% end %>
>
> >                             i didnt create any model because i just
> > want to create a simple form first.so when i brower to
"localhost:3000/
> > posts/index", it says
>
> >  "uninitialized constant PostsController::Post
>
> You have not told us which line is failing, but I guess it is the one that
says
> @post=Post.new
> which says make a new Post object, but since you have not written the
> Post model how can it make a Post object?
>
> You cannot make a form for an object without defining the model first.
>  form_for( @post ) makes a form for the object @post.    @Colin and Walter
                       ok,model is must.Created a model as.
                "rails generate model post"                 and then
did "rake db:create"(it created a database) and then "rake
db:migrate"(it created a posts tables in database).but now when i
browse to "locahost:3000/posts/index",it says


Showing /home/amrit/final/app/views/posts/index.html.erb where line #4
raised:
undefined method `posts_path'' for
#<#<Class:0xb67f7784>:0xb67f5560>

Thanks for support!!

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Colin Law

2011-May-01 08:12 UTC

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Re: Re: "uninitialized constant PostsController::Post"

On 1 May 2011 05:52, amrit pal pathak
<amritpalpathak1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> ...
> Showing /home/amrit/final/app/views/posts/index.html.erb where line #4
> raised:
> undefined method `posts_path'' for
#<#<Class:0xb67f7784>:0xb67f5560>
Amrit I cannot believe that you are asking that question.  Look back
through your questions and you will see you have asked similar
questions several times.  Always the answer is to rake routes to what
routes you have defined (and so whether posts_path is valid) and to
re-read the Rails Guides on Routing if you do not know how to get that
path defined.

Can you explain how it is that you have to keep asking the question?

Am I the only one thinking that this poster is winding us up?

Colin

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John shelfer

2011-May-01 09:11 UTC

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Re: "uninitialized constant PostsController::Post"

On May 1, 4:12 am, Colin Law
<clan...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
wrote:> On 1 May 2011 05:52, amrit pal pathak
<amritpalpath...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > ...
> > Showing /home/amrit/final/app/views/posts/index.html.erb where line #4
> > raised:
> > undefined method `posts_path'' for
#<#<Class:0xb67f7784>:0xb67f5560>
>
> Amrit I cannot believe that you are asking that question.  Look back
> through your questions and you will see you have asked similar
> questions several times.  Always the answer is to rake routes to what
> routes you have defined (and so whether posts_path is valid) and to
> re-read the Rails Guides on Routing if you do not know how to get that
> path defined.
>
> Can you explain how it is that you have to keep asking the question?
>
> Am I the only one thinking that this poster is winding us up?        Not at all.He is new to Rails So I think we should help him
to
        resolve the issue.

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Michael Pavling

2011-May-01 10:01 UTC

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Re: Re: "uninitialized constant PostsController::Post"

On 1 May 2011 09:12, Colin Law
<clanlaw-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
wrote:> Amrit I cannot believe that you are asking that question.
>
> Am I the only one thinking that this poster is winding us up?
Since post 1 I''ve thought you''re banging your head against a
wall :-/

Stuff like "this is not a [h]ard and fast rule that it must be used
for showing posts." is ridiculous...
If he wants to "just doing experiment" and use the index action to
create, then be surprised at problems, then he''s on a limb on his own.

I''m all for helping people, but they''ve got to help themselves
first
[1]. No-one is here to be anyone else''s crutch 24/7.

[1] or at least be able to help themselves with some prompting....

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amrit pal pathak

2011-May-01 12:45 UTC

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Re: "uninitialized constant PostsController::Post"

On May 1, 5:11 am, John shelfer
<johnsshel...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On May 1, 4:12 am, Colin Law
<clan...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote:
>
>
>
>
>
>
>
> > On 1 May 2011 05:52, amrit pal pathak
<amritpalpath...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > ...
> > > Showing /home/amrit/final/app/views/posts/index.html.erb where
line #4
> > > raised:
> > > undefined method `posts_path'' for
#<#<Class:0xb67f7784>:0xb67f5560>
>
> > Amrit I cannot believe that you are asking that question.  Look back
> > through your questions and you will see you have asked similar
> > questions several times.  Always the answer is to rake routes to what
> > routes you have defined (and so whether posts_path is valid) and to
> > re-read the Rails Guides on Routing if you do not know how to get that
> > path defined.
>
> > Can you explain how it is that you have to keep asking the question?
>
> > Am I the only one thinking that this poster is winding us up?
>
>         Not at all.He is new to Rails So I think we should help him
> to
>         resolve the issue.
Thank you for support sir.

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Colin Law

2011-May-01 15:10 UTC

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Re: Re: "uninitialized constant PostsController::Post"

On 1 May 2011 10:11, John shelfer
<johnsshelfer-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:>
>
> On May 1, 4:12 am, Colin Law
<clan...-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> wrote:
>> On 1 May 2011 05:52, amrit pal pathak
<amritpalpath...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>>> ...
>> Am I the only one thinking that this poster is winding us up?
>        Not at all.He is new to Rails So I think we should help him
> to
>        resolve the issue.
Ok John.  Thanks for volunteering to help sort Amrit out.  Over to you.

Good luck

Colin

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