画像投稿でのnil:NilClass

実現したいこと

railsにてwebアプリ作成中です。

画像の投稿（アップロード）をしたいのですが、
画像は該当のファイル（app/assets/images/posts/#{@post.image_photo}"）に保存はされているものの、
表示されず下記のエラーがでてしまいます。

エラーで検索してみましたが原因が特定できませんでした。。
何か原因などわかる方いましたらコメントよろしくお願い致します。。

発生しているエラーメッセージ

NoMethodError in PostsController#create
**undefined method `read' for nil:NilClass**
Extracted source (around line #24):

22 @post.image_photo="#{@post.id}.jpg"
23 image=params[:image_photo]
24 File.binwrite("app/assets/images/posts/#{@post.image_photo}", image.read)
25 redirect_to("/posts/#{@post.id}")
26 else
27 render("/posts/new")

該当のソースコード

html
1**posts/new.html**
2<div class="main posts-new">
3  <div class="container">
4    <h1 class="form-heading">投稿画面</h1>
5
6    <%= form_with(model: @post, local: true) do |s| %>
7
8      <p>メイン写真(コーディネート写真)</p>
9      <label for="file_photo">
10        <%= s.file_field :image_photo %>
11      </label><br>
12      <div class="msr_text_05">
13        <label>タイトル</label>
14        <%= s.text_field :image_title %><br>
15      </div>
16      <div class="msr_text_05">
17        <label>説明</label>
18        <%= s.text_field :description %>
19      </div>
20      <div class="parents">
21          <%= s.fields_for :items do |t| %>
22              <%= render "posts/items_fields", f: t %>
23          <% end %>
24          <div class="links">
25            <%= link_to_add_association "+アイテム入力フォーム追加", s, :items, partial: 'items_fields' %>
26          </div>
27      </div><br>
28      <div class="actions">
29        <input type="submit" value="投稿">
30      </div>
31    <% end %>
32    <br>
33    <%= link_to("トップページへ戻る", "/") %>
34  </div>
35</div>

html
1**posts/show.html**
2<div class="main posts-show">
3  <div class="container">
4    <div class="posts-show-item">
5      <%= link_to(@user.name, "/users/#{@user.id}") %>
6      <p>
7        <%= image_tag "posts/#{@post.id}", width: '700px', height: '400px' %>
8      </p>
9      <p>
10        <%= @post.image_title %>
11      </p>
12      <p>
13        <%= @post.description %>
14      </p>
15      
16      <%= form_tag("/items/new") do %>
17        <p><span>アイテム名</span>
18          <%= @post.products_name %>
19        </p>
20        <p><span>ブランド</span>
21          <%= @post.brand %>
22        </p>
23        <p><span>サイズ</span>
24          <%= @post.size %>
25        </p>
26        <p><span>&yen;</span>
27          <%= @post.price %>
28        </p>
29      <% end %>
30
31      <div class="post-time">
32        <%= @post.created_at.strftime("%Y-%m-%d") %>
33      </div>
34      <% if @post.user_id == @current_user.id %>
35      <div class="post-menus">
36        <%= link_to("編集", "/posts/#{@post.id}/edit") %>
37        <%= link_to("削除", "/posts/#{@post.id}/destroy", {method: "post"}) %>
38      </div>
39      <% end %>
40    </div>
41  </div>
42  <%= link_to("トップページへ", "/") %>
43</div>

html
1**PostsController**
2class PostsController < ApplicationController
3  before_action :ensure_correct_user, {only: [:edit, :update, :destroy]}
4
5  def index
6    @posts = Post.all.order(created_at: :desc)
7  end
8
9  def show
10    @post = Post.find_by(id: params[:id])
11    @user = @post.user
12  end
13
14  def new
15    @post = Post.new
16    @post.items.build
17  end
18
19  def create
20    @post = Post.new(post_params)
21    @post.user_id = @current_user.id
22    if @post.save
23      @post.image_photo="#{@post.id}.jpg"
24      image=params[:image_photo]
25      File.binwrite("app/assets/images/posts/#{@post.image_photo}", image.read)
26      redirect_to("/posts/#{@post.id}")
27    else
28      render("/posts/new")
29    end
30
31
32  end
33
34  def edit
35    @post = Post.find_by(id: params[:id])
36  end
37
38  def update
39    @post = Post.find_by(id: params[:id])
40    @post.image_title = params[:image_title]
41    @post.price = params[:price]
42    @post.image_photo="#{@post.id}.jpg"
43    image=params[:image_photo]
44    File.binwrite("app/assets/images/posts/#{@post.image_photo}", image.read)
45    if @post.save
46      redirect_to("/posts/#{@post.id}")
47    else
48      render("posts/#{@post.id}/edit")
49    end
50  end
51
52  def destroy
53    @post = Post.find_by(id: params[:id])
54    @post.destroy
55    redirect_to("/")
56  end
57
58  def ensure_correct_user
59    @post = Post.find_by(id: params[:id])
60    if @post.user_id != @current_user.id
61      flash[:notice] = "権限がありません"
62      redirect_to("/posts/index")
63    end
64  end
65
66  private
67
68  def post_params
69    params.require(:post).permit(:image_photo, :image_title, :description, items_attributes: [:item_image, :products_name, :brand, :size, :price])
70  end
71end
72

追記

log
1##### log
2
3Started POST "/posts" for 172.23.0.1 at 2021-07-27 04:53:14 +0000
4Cannot render console from 172.23.0.1! Allowed networks: 127.0.0.0/127.255.255.255, ::1
5Processing by PostsController#create as HTML
6Parameters: {"authenticity_token"=>"Fzd0AqvM5+OLg8/Dy4WdfYraF7hjMvBxrMckycOMuxOyHlatXvlhq96CgvRYL7Fnmp7E+6VPlqUp1tfULrlRgA==", "post"=>{"image"=>#<ActionDispatch::Http::UploadedFile:0x00007efcc96dbbc8 @tempfile=#<Tempfile:/tmp/RackMultipart20210727-1-wwif4s.jpeg>, @original_filename="キャンプテントのアイコン素材.jpeg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"post[image]\"; filename=\"\xE3\x82\xAD\xE3\x83\xA3\xE3\x83\xB3\xE3\x83\x95\xE3\x82\x9A\xE3\x83\x86\xE3\x83\xB3\xE3\x83\x88\xE3\x81\xAE\xE3\x82\xA2\xE3\x82\xA4\xE3\x82\xB3\xE3\x83\xB3\xE7\xB4\xA0\xE6\x9D\x90.jpeg\"\r\nContent-Type: image/jpeg\r\n">, "image_title"=>"い", "description"=>"い", "items_attributes"=>{"0"=>{"products_name"=>"い", "brand"=>"い", "size"=>"い", "price"=>"い", "_destroy"=>"false"}}}}
7User Load (0.8ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 5 LIMIT 1
8↳ app/controllers/application_controller.rb:14:in `set_current_user'
9Unpermitted parameter: :_destroy
10CACHE User Load (0.0ms) SELECT `users`.* FROM `users` WHERE `users`.`id` = 5 LIMIT 1 [["id", 5], ["LIMIT", 1]]
11↳ app/models/post.rb:11:in `user'
12(0.5ms) BEGIN
13↳ app/controllers/posts_controller.rb:21:in `create'
14Post Create (1.3ms) INSERT INTO `posts` (`created_at`, `updated_at`, `description`, `image_title`, `image`, `user_id`) VALUES ('2021-07-27 04:53:14.247719', '2021-07-27 04:53:14.247719', 'い', 'い', '#<ActionDispatch::Http::UploadedFile:0x00007efcc96dbbc8>', 5)
15↳ app/controllers/posts_controller.rb:21:in `create'
16Item Create (0.7ms) INSERT INTO `items` (`brand`, `size`, `price`, `products_name`, `created_at`, `updated_at`, `post_id`) VALUES ('い', 'い', 0, 'い', '2021-07-27 04:53:14.262827', '2021-07-27 04:53:14.262827', 62)
17↳ app/controllers/posts_controller.rb:21:in `create'
18(2.0ms) COMMIT
19↳ app/controllers/posts_controller.rb:21:in `create'
20Completed 500 Internal Server Error in 46ms (ActiveRecord: 5.2ms | Allocations: 6830)
21NoMethodError (undefined method `read' for nil:NilClass):
22app/controllers/posts_controller.rb:24:in `create'
23