On Sunday, December 1, 2019 at 7:12:18 PM UTC-5, Walter Lee Davis wrote: > > 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 <fuge...@gmail.com <javascript:>> > 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 rubyonra...@googlegroups.com <javascript:>. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/rubyonrails-talk/1a0cfa0a-8962-4aa6-ab89-b26a680dacb0%40googlegroups.com. > > > > Strangely the log shows it rendered the form but the page doesn't change in the browser as if nothing happened when I clicked the submit button on the index page Rendered items/_form.html.erb (34.5ms)
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