Action Text で別のテーブルを関連づけさせたいのにできない

ActiveRecord::NotNullViolation (Mysql2::Error: Field 'user_id' doesn't have a default value):

ActiveRecord::NotNullViolation in BlogsController#create
Mysql2::Error: Field 'user_id' doesn't have a default value

class CreateBlogs < ActiveRecord::Migration[6.0]
  def change
    create_table :blogs do |t|
      t.string :body
      t.references :user, foreign_key: true, null: false

      t.timestamps
    end
  end
end

class CreateActionTextTables < ActiveRecord::Migration[6.0]
  def change
    create_table :action_text_rich_texts do |t|
      t.string     :name, null: false
      t.text       :body, size: :long
      t.references :record, null: false, polymorphic: true, index: false
      t.references :user, foreign_key: true, null: false

      t.timestamps

      t.index [ :record_type, :record_id, :name ], name: "index_action_text_rich_texts_uniqueness", unique: true
    end
  end
end

class Blog < ApplicationRecord
    has_rich_text :body
    belongs_to :user
    has_many :blog_comment,dependent: :destroy
    has_many :blog_likes
    has_many :blog_liked_users, through: :blog_likes, source: :user
end

class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :validatable

  has_one_attached :image
  has_many :posts
  has_many :likes
  has_many :comments, dependent: :destroy
  has_many :movie_likes
  has_many :movies
  has_many :movie_comments
  has_many :blogs, dependent: :destroy
  has_many :blog_likes
  has_many :blog_comments, dependent: :destroy


  def liked_by?(post_id)
    likes.where(post_id: post_id).exists?
  end

  def movie_liked_by?(movie_id)
    movie_likes.where(movie_id: movie_id).exists?
  end

  def blog_liked_by?(blog_id)
    blog_likes.where(blog_id: blog_id).exists?
  end

  with_options presence: true do
    validates :nickname
    validates :mania_histry
    validates :enjoy_point
    validates :email
    validates :password, length: { minimum: 6 }
  end

  validate :image_presence

  def image_presence
    if image.attached?
      if !image.blob.content_type.in?(%('image/jpeg image/png'))
        errors.add(:image, 'にはjpegまたはpngファイルを添付してください')
      end
    end
  end
end

class BlogsController < ApplicationController
  before_action :set_blog, only: %i[ show edit update destroy ]
  before_action :authenticate_user!, only: %i[new update create edit update destroy]

  # GET /blogs or /blogs.json
  def index
    @blogs = Blog.all
  end

  # GET /blogs/1 or /blogs/1.json
  def show
    @blog_comment = BlogComment.new
    @blog_comments = @blog.blog_comments.order(id: 'DESC')
  end

  # GET /blogs/new
  def new
    @blog = Blog.new
  end

  # GET /blogs/1/edit
  def edit
  end

  # POST /blogs or /blogs.json
  def create
    @blog = Blog.new(blog_params)

    respond_to do |format|
      if @blog.save
        format.html { redirect_to @blog, notice: "Blog was successfully created." }
        format.json { render :show, status: :created, location: @blog }
      else
        format.html { render :new, status: :unprocessable_entity }
        format.json { render json: @blog.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /blogs/1 or /blogs/1.json
  def update
    respond_to do |format|
      if @blog.update(blog_params)
        format.html { redirect_to @blog, notice: "Blog was successfully updated." }
        format.json { render :show, status: :ok, location: @blog }
      else
        format.html { render :edit, status: :unprocessable_entity }
        format.json { render json: @blog.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /blogs/1 or /blogs/1.json
  def destroy
    @blog.destroy
    respond_to do |format|
      format.html { redirect_to blogs_url, notice: "Blog was successfully destroyed." }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_blog
      @blog = Blog.find(params[:id])
    end

    # Only allow a list of trusted parameters through.
    def blog_params
      params.require(:blog).permit(:body).merge(user_id: current_user.id)

    end

end

<%= form_with(model: blog, local: true) do |form| %>
  <% if blog.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(blog.errors.count, "error") %> prohibited this blog from being saved:</h2>

      <ul>
        <% blog.errors.full_messages.each do |message| %>
          <li><%= message %></li>
        <% end %>
      </ul>
    </div>
  <% end %>



  <div class="field">
    <%= form.label :記事内容 %>
    <%= form.rich_text_area :body %>
  </div>


  <div class="actions">
  <%= form.submit '投稿する', class:"button"%>

  </div>
<% end %>