Ruby on rails RoR NoMethodError在Postsnew中

因此，我一直在使用rails和google数据存储构建一个应用程序。我在新的.html.erb文件中不断遇到一个错误，在那里我得到了NoMethodError

我一直在寻找我的问题的解决方案，很可能是代码中的某个简单输入错误。我已经盯着代码看了好几个小时了，也许一些新的眼睛可以帮我弄明白

这是我的posts_controller.rb

routes.rb

编辑：这是我得到的错误日志

您已经在新方法中定义了@posts，但在new.html.erb中使用了@post。这就是错误的原因。保持相同的名称@posts或@post

您的post模型是一个普通的ruby对象，但您将其视为ActiveModel/ActiveRecord对象

尝试添加

在Post模型中包括ActiveModel:：Model，如下所示：

class Post
  include ActiveModel::Model
  ...
end

---

我想你的意思是把索引方法中的帖子改成帖子。控制器和新的.html.erb文件中的post相同。我还是一样error@KaodilichiNwuda你能用完整的错误信息更新这个问题吗？@kaodilichinwoda你在新方法中有@posts。将其更改为@post并再次检查，以免我忘记更新控制器代码。我还是一样error@KaodilichiNwuda尝试重新启动服务器。请发布错误日志。此处有许多不相关的代码。我建议你试着找一个更简单的例子，它会产生同样的错误。@kaodilichinwoda如果答案解决了你的问题，请将它标记为你问题的公认答案。

     <h1>Create Post</h1>
    <%= form_for @post do |f| %>
    <% if @post.errors.any? %>
        <% @post.errors.full_messages.each do |msg| %>
            <div class="alert alert danger"><%= msg %></div>
        <% end %>
    <% end %>
    <div class="form-group">
        <%= f.label:title %><br>
        <%= f.text_field(:title, {:class => 'form-control'}) %>
    </div>
    <div class="form-group">
        <%= f.label:body %><br>
        <%= f.text_area(:body, {:class => 'form-control'}) %>
    </div>
    <p>
    <%= f.submit({:class => 'btn btn-primary'}) %>
    </p>
<% end %>

class Post
    attr_accessor :title, :body

    # Return a Google::Cloud::Datastore::Dataset for the configured dataset.
     # The dataset is used to create, read, update, and delete entity objects.
        def self.dataset
        @dataset ||= Google::Cloud::Datastore.new(
        project: Rails.application.config.
                     database_configuration[Rails.env]["dataset_id"]
    )


end

# Query Book entities from Cloud Datastore.
#
# returns an array of Book query results and a cursor
# that can be used to query for additional results.
def self.query options = {}
  query = Google::Cloud::Datastore::Query.new
  query.kind "Post"
  query.limit options[:limit]   if options[:limit]
  query.cursor options[:cursor] if options[:cursor]

  results = dataset.run query
  posts   = results.map {|entity| Book.from_entity entity }

  if options[:limit] && results.size == options[:limit]
    next_cursor = results.cursor
  end

  return posts, next_cursor
end

  # [START from_entity]
def self.from_entity entity
  post = Post.new
  post.id = entity.key.id
  entity.properties.to_hash.each do |name, value|
    post.send "#{name}=", value if post.respond_to? "#{name}="
  end
  post
end
 # [END from_entity]

  # [START find]
  # Lookup Book by ID.  Returns Book or nil.
  def self.find id
    query    = Google::Cloud::Datastore::Key.new "Post", id.to_i
    entities = dataset.lookup query

    from_entity entities.first if entities.any?
  end
  # [END find]


 # [START validations]
  # Add Active Model validation support to Book class.
  include ActiveModel::Validations

  validates :title, presence: true

  # [END validations]

  # Save the book to Datastore.
# @return true if valid and saved successfully, otherwise false.
def save
  if valid?
    entity = to_entity
    Post.dataset.save entity
    self.id = entity.key.id
    true
  else
    false
  end
end

end

Rails.application.routes.draw do
  get 'auth/:provider/callback', to: 'sessions#create'
  get 'auth/failure', to: redirect('/')
  get 'signout', to: 'sessions#destroy', as: 'signout'

  resources :sessions, only: [:create, :destroy]
  resource :main, only: [:show]

  resources :posts

  root to: 'posts#index', as: "home"


  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

 ActionView::Template::Error (undefined method `to_key' for #<Post:0x2ae2c68>
Did you mean?  to_query):
    1: <h1>Create Post</h1>
    2: <%= form_for @post do |f| %>
    3:     <% if @post.errors.any? %>
    4:         <% @post.errors.full_messages.each do |msg| %>
    5:             <div class="alert alert danger"><%= msg %></div>

app/views/posts/new.html.erb:2:in `_app_views_posts_new_html_erb__241418705_22466964'

class Post
  include ActiveModel::Model
  ...
end