option for categories

rubyonrails-talk
1

Hi

I need to do options for categories in view

in controller i have action

def new_to_do     @categories = Category.find(:all) end

new_to_do template contains

<td><b>Category: </b></td> <td><select id="item_category_id" name="item[category_id]"> <%=options_from_collection_for_select @categories, "id", "category", @item.category_id %> </select>

I get error : You have a nil object when you didn't expect it!                  The error occurred while evaluating nil.category_id

So i have 3 tables categories, items, notes Items belongs to category and note, so I have add those to the model of item. Do i have to add category model has_many Items call also?

I appreciate that if sombody could help.

2

I get error : You have a nil object when you didn't expect it! The error occurred while evaluating nil.category_id

You use @item.category_id here without assigning anything to @item, so it's nil

So i have 3 tables categories, items, notes Items belongs to category and note, so I have add those to the model of item. Do i have to add category model has_many Items call also?

Yes, Category needs a has_many :items

if Items defined belongs_to :category

Shouldn't note belong_to Item instead the other way around? I just assume this from the name, you may know better.

3

Yeah. Note belongs to item. Thanks for replay, i have to tried it tomorrow.