当我尝试为微博创建评论时出现错误 "undefined method `comment_content'"

Question

当我为微博创建评论时出现"undefined method `comment_content'"错误，@comment.save方法有问题。

请帮我解决问题。感谢您的关注。

comments_controller

def create
  @micropost = Micropost.find(params[:micropost_id])
  @comment = Comment.new(comment_params)
  @comment.micropost = @micropost
  @comment.user = current_user
   if @comment.save
     flash[:success] = "Comment created!"
     redirect_to current_user
   else
     render 'shared/_comment_form'
   end
end

private

def comment_params
  params.require(:comment).permit(:content)
end

_comment_form

<%= form_for([micropost, @comment]) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>
   <div class="field">
     <%= f.text_area :content %>
   </div>
    <button class="btn" type="submit">
      Create
    </button>
 <% end %>

comment.rb

belongs_to :micropost
belongs_to :user

validates :comment_content, presence: true
validates :user_id, presence: true
validates :micropost_id, presence: true 

static_pages_controller

 def home
  if logged_in?
  @micropost  = current_user.microposts.build
  @feed_items = current_user.feed.paginate(page: params[:page])
  @comment = Comment.new
end
end

_micropost.html.erb

 <%= render 'shared/comment_form', micropost: micropost %>

Answer 1

首先，您可以通过以下方式改善您的动作：

  def create
    @comment = Comment.new(comment_params.merge(micropost_id: params[:micropost_id], user: current_user))
    # ....
  end

您正在验证字段 "comment_content" 是否存在：

 validates :comment_content, presence: true

不过，您的专栏好像叫"content"。您确定不应该输入 :

validates :content, presence: true

检查您的 config/schema.rb 以查看名称是 "content" 还是 "comment_content"。还要检查你是否有 运行 你的迁移与 rake db:migrate.