Set action in child form, closes #173

lib/phoenix_ecto/html.ex

@@ -59,6 +59,7 @@ if Code.ensure_loaded?(Phoenix.HTML) do
 
             %Phoenix.HTML.Form{
               source: changeset,
+              action: parent_action,
               impl: __MODULE__,
               id: id,
               name: name,
@@ -93,6 +94,7 @@ if Code.ensure_loaded?(Phoenix.HTML) do
             %Phoenix.HTML.Form{
               source: changeset,
               impl: __MODULE__,
+              action: parent_action,
               id: id <> "_" <> index_string,
               name: name <> "[" <> index_string <> "]",
               index: index,

test/phoenix_ecto/inputs_for_test.exs

@@ -3,11 +3,17 @@ defmodule PhoenixEcto.InputsForTest do
 
   import Ecto.Changeset
 
-  defp to_inputs_form(changeset, field, opts \\ []) do
+  defp to_inputs_form(changeset_or_form, field, opts \\ [])
+
+  defp to_inputs_form(%Ecto.Changeset{} = changeset, field, opts) do
     form = Phoenix.HTML.FormData.to_form(changeset, [])
     Phoenix.HTML.FormData.to_form(changeset, form, field, opts)
   end
 
+  defp to_inputs_form(%Phoenix.HTML.Form{} = form, field, opts) do
+    Phoenix.HTML.FormData.to_form(form.source, form, field, opts)
+  end
+
   ## has_one
 
   test "has one: simple" do
@@ -619,4 +625,24 @@ defmodule PhoenixEcto.InputsForTest do
 
     [] = to_inputs_form(changeset, :permalinks)
   end
+
+  ## Nesting
+
+  test "action tracking with nesting" do
+    changeset =
+      %User{comment: %Comment{body: "data", child_comments: [%Comment{body: "child"}]}}
+      |> cast(%{}, ~w()a)
+      |> cast_assoc(:comment)
+
+    f = Phoenix.HTML.FormData.to_form(changeset, action: :insert)
+    assert f.action == :insert
+
+    [f] = to_inputs_form(f, :comment)
+    assert f.action == :insert
+    assert f.source.data.body == "data"
+
+    [f] = to_inputs_form(f, :child_comments)
+    assert f.action == :insert
+    assert f.source.data.body == "child"
+  end
 end

test/test_helper.exs

@@ -21,6 +21,7 @@ defmodule Comment do
   schema "comments" do
     field :body
     field :position, :integer
+    has_many :child_comments, Comment
   end
 
   def changeset(comment, params) do
@@ -30,6 +31,7 @@ defmodule Comment do
     |> cast(params, ~w(body)a)
     |> validate_required(:body)
     |> validate_length(:body, min: 3)
+    |> cast_assoc(:child_comments)
   end
 
   def custom_changeset(comment, params, required_length) do