Rails - Nov 2005 - Passing parameters and using associations

Hi, I''m a PHP programmer doing my first post-Agile rails project and I 
am having major issues understanding how to handle associations and 
utilize GET/POST params in rails.

The particulars are as follows:

The site consists of Articles. Each article may have many pages.

Each page has an corresponding article_id which assigns it to an 
article.

Now my problems arise when I try to pass that article_id into the "Add 
new page" form. I (assume I) need that article_id to be part of the form 
so that it will be passed to the create action. I would also like to use 
that article_id to access that article''s information so I can display 
the Article''s title for the user.

I currently have the new_page (form) and create_page actions in the 
Article controller. Perhaps this is a structural problem?


Models:

class Article < ActiveRecord::Base
	has_many :article_pages
end

class ArticlePage < ActiveRecord::Base
	belongs_to :article
	validates_associated :article
end

Article Controller (edited):

class ArticlesController < ApplicationController

  # Article actions removed for

  # ###############################
  # Article Page actions
  # ###############################

  def new_page
  	#@session[:article_id] = @params[:article_id]
  	#@article_page = ArticlePage.new
  	#@article = Article.find(params[:article_id]
  	@article_page = ArticlePage.new
        # how do I pass that article_id parameter into the form?
  end

  def create_page
  	@article = Article.find params[:article_id]
  	@article.article_pages.create params[:text]
  	flash[:notice] = ''Page was successfully added to this
article.''
  	render :action => ''show''
  end


end

I would appreciate any help, advice, guidance on this subject as to the 
approach to take when faced with this situation.

Cheers,

Mike

-- 
Posted via http://www.ruby-forum.com/.

def new_page
         # create an instance of article to use in the form
        @article = Article.find(params[:article_id])
        # create an instance of article_page to use in the form
        @article_page = ArticlePage.new
  end

  def create_page
        @article = Article.find(params[:article][:id])
        @article.article_pages.create(params[:article_page])
        flash[:notice] = ''Page was successfully added to this
article.''
        render(:action => :show)
  end

view: new_page.rhtml

<form action="create_page" method="post">
<%= text_area "article_page", "text", :cols => 50,
:rows => 20 %>
<%= hidden_field "article", "id" %>
<input type="submit" value="Save" />
</form>

gets compiled to:

<form action="create_page" method="post">
<textarea cols="50" rows="20"
id="article_page_text"
name="article_page[text]"><%= @article_page.text
%></textarea>
<input type="hidden" id="article_id"
name="article[id]" value="<%= @
article.id %>" />
<input type="submit" value="Save" />
</form>

see the below documentation on how form helpers work

http://rails.rubyonrails.com/classes/ActionView/Helpers/FormHelper.html#M000338



On 11/30/05, Michael Palmer <mike-b3K1ntNyKhlBDgjK7y7TUQ@public.gmane.org>
wrote:
>
> Hi, I''m a PHP programmer doing my first post-Agile rails project
and I
> am having major issues understanding how to handle associations and
> utilize GET/POST params in rails.
>
> The particulars are as follows:
>
> The site consists of Articles. Each article may have many pages.
>
> Each page has an corresponding article_id which assigns it to an
> article.
>
> Now my problems arise when I try to pass that article_id into the "Add
> new page" form. I (assume I) need that article_id to be part of the
form
> so that it will be passed to the create action. I would also like to use
> that article_id to access that article''s information so I can
display
> the Article''s title for the user.
>
> I currently have the new_page (form) and create_page actions in the
> Article controller. Perhaps this is a structural problem?
>
>
> Models:
>
> class Article < ActiveRecord::Base
>         has_many :article_pages
> end
>
> class ArticlePage < ActiveRecord::Base
>         belongs_to :article
>         validates_associated :article
> end
>
> Article Controller (edited):
>
> class ArticlesController < ApplicationController
>
>   # Article actions removed for
>
>   # ###############################
>   # Article Page actions
>   # ###############################
>
>   def new_page
>         #@session[:article_id] = @params[:article_id]
>         #@article_page = ArticlePage.new
>         #@article = Article.find(params[:article_id]
>         @article_page = ArticlePage.new
>         # how do I pass that article_id parameter into the form?
>   end
>
>   def create_page
>         @article = Article.find params[:article_id]
>         @article.article_pages.create params[:text]
>         flash[:notice] = ''Page was successfully added to this
article.''
>         render :action => ''show''
>   end
>
>
> end
>
> I would appreciate any help, advice, guidance on this subject as to the
> approach to take when faced with this situation.
>
> Cheers,
>
> Mike
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails-1W37MKcQCpIf0INCOvqR/iCwEArCW2h5@public.gmane.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

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