Have you looked this tutorial
http://www.buildingwebapps.com/podcasts/6789-resources-page-links-categories-and-habtm/show_notes(download
the second link source code.)
Again, I'm new, so take this for what its worth...
Notice in their create method for pages and links (the two that have the
habtm relationship) there is no need to add the collection to the main
object. It looks like you shouldn't need:
@recipe.category_recipe_ids[]<<(params[:category_recipe_ids])
You should just be able to use
@recipe = Recipe.new
And it should pull in the selected categories from your select options.
Not sure if it matters but in the example posted they are using a different
select tag than you're using:
<%= f.collection_select :category_ids, Category.find(:all, :order =>
'title'), :id, :title, {}, :multiple => true %>
Actually looking at your select tag I'm not sure how something like
"recipe_ids" would be set the way you have it:
<%= select_tag 'category_recipe_ids[]',
options_from_collection_for_select(@categories, :id, :title), {
:multiple => true, :size =>5, :id => "categories_recipes_id" }
%>
Why not try something like have shown:
<%= f.collection_select :category_ids, Recipe.find(:all), :id, :title, {},
:multiple => true %>
Also if you were going to be setting the categories in recipes (which I
don't think you need to do anyway), wouldn't it be something like
@recipe.category_ids <<(params[:category_ids])
I don't think you'd set the category_recipe_id ? (Again, I'm new so I could
be way off here.)
On Wed, Jul 15, 2009 at 6:12 AM, Rails List <
[email protected]> wrote:
>
> I know it has been asked many times, but i could not find any working
> examples even after 2 days for googling. So, i thought let me ask here.
> How do I save in HABTM
>
> Its a simple application where users should be able to post recipes and
> that recipe HABTM categories. Multiple categories are selected through
> multi select list box.
>
> 1. I have 2 models: Recipe and Category
> 2. I have one join table: categories_recipes (category_id, recipe_id)
>
> Now this is in my controller:
>
> class RecipesController < ApplicationController
> def new
> @recipe = Recipe.new
> @categories = Category.find(:all)
> end
>
> def create
> @recipe = Recipe.new(params[:recipe])
> @recipe.category_recipe_ids[]<<(params[:category_recipe_ids])
> @recipe.save
> redirect_to :action=>'show', :id=>@recipe.id
> end
>
> def show
> @recipe=Recipe.find(params[:id])
> end
> end
>
> My new.html.erb
>
> <% form_for :recipe, @recipe, :url => { :action => "create" } do |f| %>
> <%= f.text_field :title, :maxlength => 100 %><br>
> <%= f.text_area :description, :rows=>'xx', :cols=>'yy' %><br>
> <%= select_tag 'category_recipe_ids[]',
> options_from_collection_for_select(@categories, :id, :title), {
> :multiple => true, :size =>5, :id => "categories_recipes_id" } %></p>
> <%= submit_tag 'save',
> :style=>'font-size:14px;font-weight:bold;width:100px' %><br>
> <% end %>
>
> Any help is much appreciated.
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>
--
Rick R
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