Pass allow_stale opt to assocs

lib/ecto/repo/schema.ex

@@ -977,7 +977,7 @@ defmodule Ecto.Repo.Schema do
   defp assoc_opts([], _opts), do: []
 
   defp assoc_opts(_assocs, opts) do
-    Keyword.take(opts, [:timeout, :log, :telemetry_event, :prefix])
+    Keyword.take(opts, [:timeout, :log, :telemetry_event, :prefix, :allow_stale])
   end
 
   defp process_parents(changeset, user_changeset, assocs, reset_assocs, adapter, opts) do

test/ecto/repo_test.exs

@@ -49,7 +49,8 @@ defmodule Ecto.RepoTest do
 
     schema "my_schema_child" do
       field :a, :string
-      belongs_to :my_schema, MySchemaNoPK, references: :n, foreign_key: :n
+      belongs_to :my_schema, MySchema
+      belongs_to :my_schema_no_pk, MySchemaNoPK, references: :n, foreign_key: :n
     end
 
     def changeset(struct, params) do
@@ -1130,6 +1131,23 @@ defmodule Ecto.RepoTest do
       assert {:ok, _} = TestRepo.delete(stale, allow_stale: true)
     end
 
+    test "insert, update allows stale children with :allow_stale option" do
+      child_schema =
+        %MySchemaChild{a: "one"}
+
+      stale =
+        put_in(child_schema.__meta__.context, {:error, :stale})
+        |> Ecto.Changeset.change()
+
+      changeset =
+        %MySchema{id: 1}
+        |> Ecto.Changeset.change()
+        |> Ecto.Changeset.put_assoc(:children, [stale])
+
+      assert {:ok, _} = TestRepo.insert(changeset, allow_stale: true)
+      assert {:ok, _} = TestRepo.update(changeset, allow_stale: true)
+    end
+
     test "insert and delete sets schema prefix with struct" do
       valid = %MySchema{id: 1}