Look at a generic Rails controller, fresh out of `rails generate scaffold foo bar baz`. You will see that the `foos/new` form posts to the /foos path. That's what I mean by "posts to the collection". Once an instance has been persisted, you will see that the `foos/1/edit` form sends a POST disguised as a PATCH or PUT to the instance, at foos/1, and the `update` method is invoked by the controller. But when you are first creating a new instance, you are sending a POST to /foos (the collection of Foo instances).
Don't try to create a separate form for each kind of thing you want to create yet, just focus for now on making the two-step "wizard" work. Once you have that working, you can use the controller's `new` method (which will be getting a parameter passed to it to say what the item_type is) to decide which form to render. But until you have that part figured out, don't waste your energy on rendering a different form. Walter > On Dec 1, 2019, at 3:17 PM, fugee ohu <fugee...@gmail.com> wrote: > > > > On Sunday, December 1, 2019 at 12:49:53 PM UTC-5, Walter Lee Davis wrote: > That's just it, you don't. You POST to the collection, which `create`s a new > instance. > > If you are expecting the GET with a querystring to create a new form with a > picker selected, you should start by creating the form all in one piece, > where you create a new form including a select (like the one you are trying > to divide across two pages) in that same form. Make sure that submitting that > form works, even though it doesn't do precisely what you're asking it to do > in the divided form (yet). > > Then figure out how to set that property (which the select chooses) on the > `new` controller method. > > There's a couple of different ways to do that. One would be to create a > completely hand-made variable that you pass in the querystring of the form: > > /items/new?item_type=Foo > > and then "catch" that in the controller in the new method: > > @item = Item.new(item_type = params[:item_type]) > > The other would be to go full-on REST, and create a new instance in the > `index`, use that to build your form, and then you can use the regular > strong_params accessor to get that same value (which will be "nested" inside > a properly-named instance params hash) and assign it to the instance in the > `new` method. > > Now, what you should see at this point is that your all-in-one `new` form > begins to behave "automatically". The instance that you build in the > controller will be populated with the item_type property, and the picker will > auto-select to the chosen value. > > Once you see this working, you can change the select (picker) to a hidden > field, and with no other changes, you will have your two-step form. > > Walter > > > On Dec 1, 2019, at 12:17 PM, fugee ohu <fuge...@gmail.com> wrote: > > > > Thanks but since when do we post to the new action? > > > > -- > > You received this message because you are subscribed to the Google Groups > > "Ruby on Rails: Talk" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to rubyonra...@googlegroups.com. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/rubyonrails-talk/fd3f5207-840b-4fec-ba29-100fdf882447%40googlegroups.com. > > > > > What does that mean? How do I POST to a collection which creates a new > instance > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to rubyonrails-talk+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/rubyonrails-talk/1a0cfa0a-8962-4aa6-ab89-b26a680dacb0%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/930A6D5B-B6D9-4526-BC6A-364338DC84FA%40wdstudio.com.
