rich_text_area content記入欄が表示されない

rich_text_area　を表示させたい

ActionTextを記述、インストールし
rich_text_areaのコードを記述しましたが、
タイトル部分だけ記入欄が表示され、
contentの部分が表示されません。

https://gyazo.com/ae1ee59958ae4f6412a93aa799161dd5

bootstrapでscssを指定しているからでしょうか
ご教授お願いいたします。

該当のソースコード

fomeHTMLerb
1<%= form_with(model: post, local: true) do |form| %>
2  <% if post.errors.any? %>
3    <div id="error_explanation">
4      <h2><%= pluralize(post.errors.count, "error") %> prohibited this post from being saved:</h2>
5
6      <ul>
7        <% post.errors.full_messages.each do |message| %>
8          <li><%= message %></li>
9        <% end %>
10      </ul>
11    </div>
12  <% end %>
13
14  <div class="field">
15    <%= form.label :title %>
16    <%= form.text_field :title %>
17  </div>
18
19  <div class="field">
20    <%= form.label :content %>
21    <%= form.rich_text_area :content %>
22  </div>
23
24  <div class="actions">
25    <%= form.submit %>
26  </div>
27<% end %>
28

newHTMLerb
1<%= render "shared/header"%>
2
3<h1>New Post</h1>
4
5<%= render 'form', post: @post %>
6
7<%= link_to 'Back', posts_path %>
8
9<%= render "shared/footer"%>

postRB
1class Post < ApplicationRecord
2  has_rich_text :content
3  belongs_to :category
4  def self.search(search)
5    if search != ""
6      Post.where('text LIKE(?)', "%#{search}%")
7    else
8      Post.all
9    end
10  end
11end
12

postController
1class PostsController < ApplicationController
2  before_action :set_post, only: [:show, :edit, :update, :destroy]
3  before_action :move_to_index, except: [:index, :show]
4  before_action :search_post, only: [:index, :search]
5
6  # GET /posts
7  # GET /posts.json
8  def index
9    @posts = Post.includes(:user).order("created_at DESC")
10  end
11
12  # GET /posts/1
13  # GET /posts/1.json
14  def show
15  end
16
17  # GET /posts/new
18  def new
19    @post = Post.new
20  end
21
22  # GET /posts/1/edit
23  def edit
24  end
25
26  # POST /posts
27  # POST /posts.json
28  def create
29    @post = Post.new(post_params)
30
31    respond_to do |format|
32      if @post.save
33        format.html { redirect_to @post, notice: 'Post was successfully created.' }
34        format.json { render :show, status: :created, location: @post }
35      else
36        format.html { render :new }
37        format.json { render json: @post.errors, status: :unprocessable_entity }
38      end
39    end
40  end
41
42  # PATCH/PUT /posts/1
43  # PATCH/PUT /posts/1.json
44  def update
45    respond_to do |format|
46      if @post.update(post_params)
47        format.html { redirect_to @post, notice: 'Post was successfully updated.' }
48        format.json { render :show, status: :ok, location: @post }
49      else
50        format.html { render :edit }
51        format.json { render json: @post.errors, status: :unprocessable_entity }
52      end
53    end
54  end
55
56  # DELETE /posts/1
57  # DELETE /posts/1.json
58  def destroy
59    @post.destroy
60    respond_to do |format|
61      format.html { redirect_to posts_url, notice: 'Post was successfully destroyed.' }
62      format.json { head :no_content }
63    end
64  end
65
66  def search
67    @posts = @p.result.includes(:category)  # 検索条件にマッチした商品の情報を取得
68  end
69
70  private
71    # Use callbacks to share common setup or constraints between actions.
72    def set_post
73      @post = Post.find(params[:id])
74    end
75
76    # Only allow a list of trusted parameters through.
77    def post_params
78      params.require(:post).permit(:title, :content)
79    end
80
81    def move_to_index
82      unless user_signed_in?
83        redirect_to action: :index
84      end
85    end
86
87    def search_post
88      @p = Post.ransack(params[:q])  # 検索オブジェクトを生成
89    end
90end
91