ruby-on-rails – 1错误禁止本书被保存

1错误禁止本书被保存

>用户必须存在

当我编辑我的书它工作正常,但当我尝试创建新书时,它显示.error /

这是图书管理员：

class BooksController < ApplicationController
     before_action :find_book,only:[:show,:edit,:update,:destroy,:upvote]
    before_action :authenticate_user!
  def index
    @books = Book.all.order('created_at DESC')
  end


  def show
  end

  def edit
  end

  def update
    if @book.update(book_params)
        redirect_to @book
    else
        render 'edit'
    end
end
def destroy
@book.destroy
redirect_to root_path,notice: "successfully deleted"
end

def new
    @book =Book.new

end

def create
    @book =Book.new(book_params)
    if @book.save
        redirect_to @book
    else
        render 'new'
    end
end

private

def find_book
    @book=Book.find(params[:id])
end

    def book_params
       params.require(:book).permit(:title,:description,:image)
    end
end

我的books.rb是：

class Book < ApplicationRecord
  #Paperclip.options[:command_path] = 'C:Program FilesImageMagick-7.0.5-Q16'
   has_attached_file :image,styles: { }
   do_not_validate_attachment_file_type :image
  #validates_attachment_content_type :image,content_type: /Aimage/.*z/
  belongs_to :user
end