Simplify the setting of pageKey (#73)

This commit makes Superglue a bit smarter. Previously, content-location was
used to specify the pageKey for 200s from non-get requests, but this was too
cumbersome as the most common use case was setting the URL to be the referrer
of the non-get request upon 200.

This uses that as the default logic but still accepts content-location if
we want to explicitly override from the server, which is unlikely. Additionally
I simplified the logic. We always want to use the response's URL unless in
the case mentioned above. Existing tests pass.

docs/rails.md

@@ -1,33 +1,5 @@
 # Rails
 
-## Setting the content location
-
-On non-GET `visit`s, Superglue uses the response's `content-location` to create
-the key used to store your props.
-
-This is because when you render in a `create` or `update`, the returned
-response does not necessarily reflect the url the user should see.
-
-For example, when the user is on `posts/new` and they make a POST request to
-`posts/`, we may decide to render `posts/new` for any errors you'd like to
-show.
-
-It is recommended that you set this header in your `create` and `update`
-methods. If you used the generators, this is done for you.
-
-```ruby
-def create
-  @post = Post.new(post_params)
-
-  if @post.save
-    redirect_to @post, notice: 'Post was successfully created.'
-  else
-    response.set_header("content-location", new_post_path)
-    render :new
-  end
-end
-```
-
 ## Rails Flash
 
 The installation generator will add a `flash.js` slice to `app/javascript/slices`
@@ -66,3 +38,23 @@ def create
   redirect_back_with_props_at fallback_url: '/'
 end
 ```
+
+## Setting the content location
+
+You can override the URL Superglue uses to display on the address bar and
+store your response directly from the server using `content-location`. This
+is optional. For example:
+
+```ruby
+def create
+  @post = Post.new(post_params)
+
+  if @post.save
+    redirect_to @post, notice: 'Post was successfully created.'
+  else
+    response.set_header("content-location", new_post_path)
+    render :new
+  end
+end
+```
+

superglue/lib/action_creators/requests.ts

@@ -206,30 +206,30 @@ export function visit(
           rsp,
           fetchArgs,
         }
+        const isGet = fetchArgs[1].method === 'GET'
 
         meta.suggestedAction = 'push'
-        if (!rsp.redirected && fetchArgs[1].method != 'GET') {
+        if (!rsp.redirected && !isGet) {
           meta.suggestedAction = 'replace'
         }
 
-        if (revisit && fetchArgs[1].method == 'GET') {
+        if (revisit && isGet) {
           if (rsp.redirected) {
             meta.suggestedAction = 'replace'
           } else {
             meta.suggestedAction = 'none'
           }
         }
 
-        if (method !== 'GET') {
-          const contentLocation = rsp.headers.get('content-location')
+        pageKey = urlToPageKey(rsp.url)
 
-          if (contentLocation) {
-            pageKey = urlToPageKey(contentLocation)
-          }
+        if (!isGet && !rsp.redirected) {
+          pageKey = currentPageKey
         }
 
-        if (rsp.redirected) {
-          pageKey = urlToPageKey(rsp.url)
+        const contentLocation = rsp.headers.get('content-location')
+        if (contentLocation) {
+          pageKey = urlToPageKey(contentLocation)
         }
 
         const page = beforeSave(pages[pageKey], json)

superglue_rails/lib/generators/rails/templates/controller.rb.tt

@@ -31,7 +31,6 @@ class <%= controller_class_name %>Controller < ApplicationController
     if @<%= orm_instance.save %>
       redirect_to @<%= singular_table_name %>, notice: <%= "'#{human_name} was successfully created.'" %>
     else
-      response.set_header("content-location", new_<%= singular_table_name %>_path)
       render :new
     end
   end
@@ -41,7 +40,6 @@ class <%= controller_class_name %>Controller < ApplicationController
     if @<%= orm_instance.update("#{singular_table_name}_params") %>
       redirect_to @<%= singular_table_name %>, notice: <%= "'#{human_name} was successfully updated.'" %>
     else
-      response.set_header("content-location", edit_<%= singular_table_name %>_path(@<%= singular_table_name %>))
       render :edit
     end
   end