If I replace
f.collection_select :category_id, Category.all, :id, :header,
{}, :multiple => false
with just
f.collection_select :category_id, Category.all, :id, :header
it works!
Is this a bug, or is it me being an idiot?
TIA,
Craig
On Sep 25, 11:59 am, Dudebot <craign...@gmail.com> wrote:
> Thanks again, Colin--in item.rb:
>
> belongs_to :category
>
> And in category.rb:
>
> has_many :items
>
> Item has a field category_id which I intended to populate with the
> links from an item to its category. The field header in the category
> db is where the name of the category is.
>
> Am I setting it up wrong then to have:
>
> <%= f.collection_select :category_id, Category.all, :id, :header,
> {}, :multiple => false %>
>
> in the form? It does show up as a drop down box with the names
> populated in it.
>
> Again, thanks super for helping me figure this out,
> Craig
>
> On Sep 25, 8:19 am, Colin Law <clan...@googlemail.com> wrote:
>
>
>
> > 2009/9/25 Dudebot <craign...@gmail.com>:
>
> > > Thanks super, Colin--that really helps. I believe category_id is
> > > being passed, as in the development.log
>
> > > Processing ItemsController#update (for ::1 at 2009-09-25 06:34:23)
> > > [PUT]
> > > Parameters: {"commit"=>"Update", ... "id"=>"228", "item"=>
> > > {..."category_id"=>["2"], ...}}
>
> > This looks a bit odd, why is it passing the id as a single element
> > array I wonder?
> > See below
>
> > > [4;35;1mPage Load (1.1ms) [0m [0mSELECT * FROM "pages" ORDER BY
> > > position [0m
> > > [4;36;1mUser Load (0.6ms) [0m [0;1mSELECT * FROM "users" WHERE
> > > ("users"."id" = 1) LIMIT 1 [0m
> > > [4;35;1mItem Load (0.7ms) [0m [0mSELECT * FROM "items" WHERE
> > > ("items"."id" = 228) [0m
> > > Redirected tohttp://localhost:3000/items/228
> > > Completed in 102ms (DB: 2) | 302 Found [http://localhost/items/228]
>
> > > and for different updates, the number in category_id [ ] is changing.
> > > In my controller, I have the provided boilerplate for update:
>
> > > def update
> > > �...@item = Item.find( params[ :id ] )
>
> > > respond_to do |format|
> > > if @item.update_attributes(params[:item])
> > > ...
>
> > > Am I missing something in the controller? Does a collection need to
> > > be handled separately?
>
> > > Many TIA,
> > > Craig
>
> > > On Sep 25, 2:36 am, Colin Law <clan...@googlemail.com> wrote:
> > >> 2009/9/25 Dudebot <craign...@gmail.com>:
>
> > >> > Hi Gurus, I'm trying to tackle a drop down list. I have category and
> > >> > item dbs, and they're wired up with category has_many :items and item
> > >> > belongs_to :category, and an item has a category_id. I have this code
> > >> > in my new/edit.html.erb for item:
>
> > >> > <%= f.collection_select :category_id,
> > >> > Category.find_main, :id, :header, {}, :multiple => false %>
>
> > I don't see anything wrong with this.
>
> > >> > And a pretty drop down list comes up, but no matter what I do, I can't
> > >> > save an item with a different category--it always stubbornly records
> > >> > the same one (or doesn't change it at all). The source html code
> > >> > generated is:
>
> > >> > <select id="item_category_id" name="item[category_id][]"><option
>
> > There is the problemI think, the extra set of [] for item[category_id].
> > Are you sure you have item belongs_to :category? It is as if it
> > thinks there should be an array of id values.
>
> > Colin
>
> > >> > value="3">Awesome Things</option>
> > >> > <option value="1" selected="selected">Good Things</option>
> > >> > <option value="2">Better Things</option></select>
>
> > >> > ...and although I can "choose" a different category for an item than
> > >> > 'Good Things', it only records 'Good Things' (category_id 1) for all
> > >> > items.
>
> > >> The first thing to do is to look in your log file (log/developent.log)
> > >> to check that the selection is being passed in params. If it is then
> > >> consider whether what the controller action that you are passing it to
> > >> is doing with it.
>
> > >> Colin
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