Fix nested embeds errors

lib/polymorphic_embed/html/helpers.ex

@@ -107,6 +107,7 @@ if Code.ensure_loaded?(Phoenix.HTML) && Code.ensure_loaded?(Phoenix.HTML.Form) d
           index: if(array?, do: i),
           errors: errors,
           data: data,
+          action: parent_action,
           params: params,
           hidden: [{type_field_name, to_string(type)}],
           options: options

test/polymorphic_embed_test.exs

@@ -2503,6 +2503,43 @@ defmodule PolymorphicEmbedTest do
   end
 
   describe "polymorphic_embed_inputs_for/1" do
+    test "errors in form for polymorphic embed and nested embed" do
+      reminder_module = get_module(Reminder, :polymorphic)
+
+      sms_reminder_attrs = %{
+        text: "This is an SMS reminder",
+        contexts: [
+          %{
+            __type__: "device",
+            extra: %{}
+          }
+        ]
+      }
+
+      changeset =
+        reminder_module
+        |> struct()
+        |> reminder_module.changeset(sms_reminder_attrs)
+
+      changeset = %{changeset | action: :insert}
+
+      html_string =
+        render_component(
+          &liveview_form_with_inputs_for/1,
+          %{changeset: changeset, field: :contexts}
+        )
+
+      assert String.contains?(
+               html_string,
+               "[type: {"can't be blank", [validation: :required]}]"
+             )
+
+      assert String.contains?(
+               html_string,
+               "[imei: {"can't be blank", [validation: :required]}]"
+             )
+    end
+
     test "generates forms that can be rendered (custom type field/identify_by_fields)" do
       reminder_module = get_module(Reminder, :polymorphic)
 
@@ -3520,6 +3557,24 @@ defmodule PolymorphicEmbedTest do
     """
   end
 
+  defp liveview_form_with_inputs_for(assigns) do
+    ~H"""
+    <.form
+      :let={f}
+      for={@changeset}
+    >
+      <.polymorphic_embed_inputs_for field={f[@field]} :let={sms_form}>
+        <%= text_input sms_form, :number %>
+        <%= sms_form.errors |> inspect() %>
+        <.inputs_for field={sms_form[:extra]} :let={channel_form}>
+          <%= text_input channel_form, :imei %>
+          <%= channel_form.errors |> inspect() %>
+        </.inputs_for>
+      </.polymorphic_embed_inputs_for>
+    </.form>
+    """
+  end
+
   defp polymorphic?(:polymorphic), do: true
   defp polymorphic?(:not_polymorphic), do: false
 end

test/support/models/polymorphic/reminder/context/device.ex

@@ -6,14 +6,13 @@ defmodule PolymorphicEmbed.Reminder.Context.Device do
     field :ref, :string
     field :type, :string
 
-    embeds_one :extra, Extra do
-      field :imei, :string
-    end
+    embeds_one :extra, PolymorphicEmbed.Reminder.Context.Extra
   end
 
   def changeset(struct, params) do
     struct
     |> cast(params, ~w(ref type)a)
     |> validate_required(~w(type)a)
+    |> cast_embed(:extra)
   end
 end

test/support/models/polymorphic/reminder/context/device_no_id.ex

@@ -8,9 +8,7 @@ defmodule PolymorphicEmbed.Reminder.Context.DeviceNoId do
     field :ref, :string
     field :type, :string
 
-    embeds_one :extra, Extra do
-      field :imei, :string
-    end
+    embeds_one :extra, PolymorphicEmbed.Reminder.Context
   end
 
   def changeset(struct, params) do

test/support/models/polymorphic/reminder/context/extra.ex

@@ -0,0 +1,14 @@
+defmodule PolymorphicEmbed.Reminder.Context.Extra do
+  use Ecto.Schema
+  import Ecto.Changeset
+
+  embedded_schema do
+    field :imei, :string
+  end
+
+  def changeset(extra, attrs) do
+    extra
+    |> cast(attrs, [:imei])
+    |> validate_required([:imei])
+  end
+end