From 7bc5a21c6339c0a4dbad2d1cf3b85d48a058581e Mon Sep 17 00:00:00 2001
From: Dmitry Shpagin <dmitry.shpagin@balance-pl.ru>
Date: Wed, 3 Jul 2024 21:56:37 +0300
Subject: [PATCH 1/2] Casting of arrays into specified Schemas

---
 lib/open_api_spex/cast.ex |  6 +++-
 test/cast_test.exs        | 63 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 1 deletion(-)

diff --git a/lib/open_api_spex/cast.ex b/lib/open_api_spex/cast.ex
index 269cf3f4..b386e727 100644
--- a/lib/open_api_spex/cast.ex
+++ b/lib/open_api_spex/cast.ex
@@ -207,7 +207,11 @@ defmodule OpenApiSpex.Cast do
   def cast(%__MODULE__{schema: %{type: _other}} = ctx),
     do: error(ctx, {:invalid_schema_type})
 
-  def cast(%{} = ctx), do: cast(struct(__MODULE__, ctx))
+  def cast(%__MODULE__{value: struct, schema: schema_module} = ctx)
+      when is_struct(struct) and is_atom(schema_module),
+      do: cast(ctx.schema.schema(), ctx.value)
+
+  def cast(%{} = ctx), do: cast(struct(__MODULE__, ctx.value))
   def cast(ctx) when is_list(ctx), do: cast(struct(__MODULE__, ctx))
 
   # Add an error
diff --git a/test/cast_test.exs b/test/cast_test.exs
index 1cb2baf5..0df8e9d1 100644
--- a/test/cast_test.exs
+++ b/test/cast_test.exs
@@ -6,6 +6,69 @@ defmodule OpenApiSpec.CastTest do
 
   def cast(ctx), do: Cast.cast(ctx)
 
+  describe "SubScheme with array" do
+    defmodule User do
+      defstruct [:email, :permissions]
+    end
+
+    defmodule Permission do
+      defstruct [:name, :some_other_field]
+    end
+
+    defmodule UsersSchemas do
+      alias OpenApiSpex.Schema
+
+      defmodule PermissionSchema do
+        @moduledoc false
+        require OpenApiSpex
+
+        OpenApiSpex.schema(%{
+          title: "Permission",
+          type: :object,
+          properties: %{
+            name: %Schema{type: :string}
+          },
+          required: [:name, :some_other_field]
+        })
+      end
+
+      defmodule UserSchema do
+        @moduledoc false
+        require OpenApiSpex
+
+        OpenApiSpex.schema(%{
+          title: "User",
+          type: :object,
+          properties: %{
+            email: %Schema{type: :string},
+            permissions: %Schema{type: :array, items: PermissionSchema}
+          },
+          required: [:email, :permissions]
+        })
+      end
+    end
+
+    test "Correct casting of sub arrays" do
+      permissions = [
+        %Permission{name: "Work", some_other_field: 1},
+        %Permission{name: "Rest", some_other_field: 2},
+        %Permission{name: "Smile", some_other_field: 3}
+      ]
+
+      user = %User{email: "happy_admin@email.com", permissions: permissions}
+
+      assert {:ok,
+              %UsersSchemas.UserSchema{
+                email: "happy_admin@email.com",
+                permissions: [
+                  %UsersSchemas.PermissionSchema{name: "Work"},
+                  %UsersSchemas.PermissionSchema{name: "Rest"},
+                  %UsersSchemas.PermissionSchema{name: "Smile"}
+                ]
+              }} == OpenApiSpex.cast_value(user, UsersSchemas.UserSchema.schema())
+    end
+  end
+
   describe "cast/1" do
     test "unknown schema type" do
       assert {:error, [error]} = cast(value: "string", schema: %Schema{type: :nope})

From 327e187394e9c5b91700ff258b67b8a99d117f59 Mon Sep 17 00:00:00 2001
From: Dmitry Shpagin <dmitry.shpagin@balance-pl.ru>
Date: Wed, 3 Jul 2024 22:14:10 +0300
Subject: [PATCH 2/2] fixup! Casting of arrays into specified Schemas

---
 lib/open_api_spex/cast.ex | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/open_api_spex/cast.ex b/lib/open_api_spex/cast.ex
index b386e727..b4b8c051 100644
--- a/lib/open_api_spex/cast.ex
+++ b/lib/open_api_spex/cast.ex
@@ -211,7 +211,7 @@ defmodule OpenApiSpex.Cast do
       when is_struct(struct) and is_atom(schema_module),
       do: cast(ctx.schema.schema(), ctx.value)
 
-  def cast(%{} = ctx), do: cast(struct(__MODULE__, ctx.value))
+  def cast(%{} = ctx), do: cast(struct(__MODULE__, ctx))
   def cast(ctx) when is_list(ctx), do: cast(struct(__MODULE__, ctx))
 
   # Add an error