Rails 5上带有simple_form的未定义方法“ model_name”

Question

当我想在Rails 5上编辑基本帖子时，我收到了一个带有simple_form的undefined method 'model_name' model_name undefined method 'model_name'错误。

show.html.haml：

= link_to "Edit", edit_post_path(@post)

edit.html.haml：

= simple_form_for @post do |f|
    = f.input :title
    = f.input :link
    = f.input :description

    = f.button :submit

posts_controller.rb：

def show
  @post = Post.find(params[:id])
end

def edit
end

def update
  if @post.update(post_params)
    redirect_to @post
  else
    render 'edit'
  end
end

任何想法？

Answer 1

def edit
  @post = Post.find(params[:id]) # <=========
end