Rails NoMethodError for Blog在Heroku上创建,但不在本地主机上创建

我有一个基本博客结构的应用程序。创建新博客在 localhost 但是当我试图在Heroku上创建一个新的博客时,我的日志中会出现以下错误:

2018-07-11T21:20:01.863867+00:00 app[web.1]: [2f20a9d7-e0f6-4ab9-b2ac-d6b3a08e8ed0] Command :: file -b --mime '/tmp/819c55b783715f61a2656207b4852b5c20180711-4-140ohfr.jpg'
2018-07-11T21:20:01.872443+00:00 app[web.1]: [2f20a9d7-e0f6-4ab9-b2ac-d6b3a08e8ed0] Completed 500 Internal Server Error in 38ms (ActiveRecord: 0.0ms)
2018-07-11T21:20:01.873180+00:00 app[web.1]: [2f20a9d7-e0f6-4ab9-b2ac-d6b3a08e8ed0]
2018-07-11T21:20:01.873253+00:00 app[web.1]: [2f20a9d7-e0f6-4ab9-b2ac-d6b3a08e8ed0] NoMethodError (undefined method `[]=' for nil:NilClass):
2018-07-11T21:20:01.873285+00:00 app[web.1]: [2f20a9d7-e0f6-4ab9-b2ac-d6b3a08e8ed0]
2018-07-11T21:20:01.873329+00:00 app[web.1]: [2f20a9d7-e0f6-4ab9-b2ac-d6b3a08e8ed0] app/controllers/blogs_controller.rb:48:in `create'
2018-07-11T21:20:01.874027+00:00 app[web.1]: 10.101.219.132 - - [11/Jul/2018:21:19:56 UTC] "POST /blogs HTTP/1.1" 500 1958
2018-07-11T21:20:01.874063+00:00 app[web.1]: http://www.linchpinrealty.com/blogs/new -> /blogs
2018-07-11T21:20:01.874816+00:00 heroku[router]: at=info method=POST path="/blogs" host=www.linchpinrealty.com request_id=2f20a9d7-e0f6-4ab9-b2ac-d6b3a08e8ed0 fwd="68.225.227.137" dyno=web.1 connect=0ms service=5463ms status=500 bytes=2235 protocol=http

我的 blogs#create 方法相当简单:

 def create
    @pillars = Pillar.all
    @blog = Blog.new(blog_params)
    if current_user.id = 1
      @blog.user_id = 2
    else
      @blog.user = current_user
    end

    if @blog.save
      redirect_to @blog, notice: 'Blog was successfully created.'
    else
      render :new
    end
  end

我有以下权限:

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

    # Only allow a trusted parameter "white list" through.
    def blog_params
      params.require(:blog).permit(:title, :teaser, :body, :user_id, :image, :tag_list, :link_text, :link_filename, :pillars_id)
    end

我不确定事情的发展方向(没有双关语)。我确实看到了 this 问题:问题在哪里是数据库问题。在这种情况下,我最近所做的唯一改变就是 blogs#show 方法…即使我不知道这将如何阻止博客保存到数据库中(它不知道):

  def show
    @pillars = Pillar.all
    @pillar = Pillar.find_by(id: @blog.pillars_id)
    @related = Blog.where(pillars_id: @blog.pillars_id).where.not(id: @blog.id).limit(4)
    @comment = @blog.comments.build
    @comments = Comment.where(blog_id: @blog.id, approved: true)
    if current_user
      @user = current_user
    end
  end

有人知道我哪里出错了吗?