fix: always pass forms down

lib/ash_phoenix/form/form.ex

@@ -1317,11 +1317,19 @@ defmodule AshPhoenix.Form do
 
         if data do
           if (opts[:type] || :single) == :single do
-            for_update(data, update_action, errors: error?, prev_data_trail: prev_data_trail)
+            for_update(data, update_action,
+              errors: error?,
+              prev_data_trail: prev_data_trail,
+              forms: opts[:forms] || []
+            )
           else
             Enum.map(
               data,
-              &for_update(&1, update_action, errors: error?, prev_data_trail: prev_data_trail)
+              &for_update(&1, update_action,
+                errors: error?,
+                prev_data_trail: prev_data_trail,
+                forms: opts[:forms] || []
+              )
             )
           end
         else

lib/ash_phoenix/form/no_data_loaded.ex

@@ -5,7 +5,7 @@ defmodule AshPhoenix.Form.NoDataLoaded do
     %__MODULE__{path: opts[:path]}
   end
 
-  def message(%{action: :update, path: path}) do
+  def message(%{path: path}) do
     """
     Data was not loaded when using a function to determine data at path: #{inspect(path)}.
     If you pass a function to the `data` option, you need to either
@@ -42,27 +42,4 @@ defmodule AshPhoenix.Form.NoDataLoaded do
         )
     """
   end
-
-  def message(%{action: :create, path: path}) do
-    """
-    The `data` key was configured for #{inspect(path)}, but no `update_action` was configured. Please configure one.
-
-    For example:
-        Form.for_create(
-          Resource,
-          :action,
-          params,
-          forms: [
-            # For forms over existing data
-            form_name: [
-              type: :list,
-              as: "form_name",
-              data: data,
-              resource: RelatedResource,
-              update_action: :update_or_destroy_action_name
-            ]
-          ]
-        )
-    """
-  end
 end

test/form_test.exs

@@ -555,7 +555,16 @@ defmodule AshPhoenix.FormTest do
 
     test "failing single intermediate form" do
       post_id = Ash.UUID.generate()
-      comment = %Comment{text: "text", post: %Post{id: post_id, text: "Some text"}}
+      comment_id = Ash.UUID.generate()
+
+      comment = %Comment{
+        text: "text",
+        post: %Post{
+          id: post_id,
+          text: "Some text",
+          comments: [%Comment{id: comment_id}]
+        }
+      }
 
       form =
         comment
@@ -580,7 +589,7 @@ defmodule AshPhoenix.FormTest do
           ]
         )
 
-      assert [%Phoenix.HTML.Form{source: %AshPhoenix.Form{resource: AshPhoenix.Test.Post}}] =
+      assert [%Phoenix.HTML.Form{source: %AshPhoenix.Form{resource: AshPhoenix.Test.Comment}}] =
                form
                |> form_for("action")
                |> inputs_for(:post)