From cb961a63fb1b325def1ade7548dd0e1d08a460c3 Mon Sep 17 00:00:00 2001
From: devvit <baal@baals-iMac.lan>
Date: Sun, 4 Mar 2018 23:14:54 +0800
Subject: [PATCH] multiple uploads example

---
 README.md | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/README.md b/README.md
index 57598af..7cdb042 100644
--- a/README.md
+++ b/README.md
@@ -137,6 +137,52 @@ Both public and signed urls will include the timestamp for cache busting, and ar
   MyApp.Avatar.url({user.avatar, user}, :thumb, signed: true)
 ```
 
+### Example of multiple uploads
+
+Multiple uploads through embedded schema.
+
+```elixir
+
+# Embeded schema
+defmodule Photo do
+  use Ecto.Schema
+  use Arc.Ecto.Schema
+
+  import Ecto.Changeset
+
+  @primary_key false
+
+  embedded_schema do
+    field :fileinfo, Myapp.Uploader.Type
+  end
+
+  def changeset(photo, params \\ %{}) do
+    photo
+    |> cast(params, [])
+    |> cast_attachments(params, [:fileinfo], allow_paths: true)
+  end
+end
+
+# Database schema
+defmodule Post do
+  embeds_many :photos, Photo, on_replace: :delete
+end
+
+# Controller
+def update(conn, params) do
+  post = Repo.get! Post, params["id"]
+
+  photos = for f <- params["uploads"] do
+    %Photo{}
+    |> Photo.changeset(%{fileinfo: f})
+  end
+
+  Post.changeset(post)
+    |> Ecto.Changeset.put_embed(:photos, photos)
+    |> Repo.update
+end
+```
+
 ## License
 
 Copyright 2015 Sean Stavropoulos