小编cor*_*zle的帖子

在我的 rails 应用程序中，我需要按用户名列出用户，我得到的错误是

NoMethodError in Posts#index

Showing C:/Users/Corey/Dev/statlog/app/views/posts/index.html.erb where line #12 raised:

undefined method `username' for #<Array:0x3893298>
Extracted source (around line #12):

9: <div class="follow-row">
10:   <div class="titan-users nuvo"><h2>TITAN Users</h2></div>
11:     <% @users.each do |post| %>
12:       <div class="user-row"><%= @user.username %></div>
13:     <% end %>
14: </div>
15: 
Rails.root: C:/Users/Corey/Dev/statlog

Application Trace | Framework Trace | Full Trace
app/views/posts/index.html.erb:12:in `block in _app_views_posts_index_html_erb___134739565_23193672'
app/views/posts/index.html.erb:11:in `each'
app/views/posts/index.html.erb:11:in `_app_views_posts_index_html_erb___134739565_23193672'
app/controllers/posts_controller.rb:13:in `index'

下面是我的posts_controller 你看我没有user_controller。

    class PostsController < ApplicationController
  # GET /posts
  # GET /posts.json …

在我的应用程序中,我最初创建了一个用户脚手架,然后我创建了一个Devise User模型,只是将属性添加到User模型,但是在我的用户控制器中,每当我尝试使参数"username"成为允许的参数时,它仍然会吐出来错误"用户名不是允许的参数".

我的user.rb

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :rememberable, :trackable, :validatable
  belongs_to :role

  def email_required?
    false
  end

  def email_changed?
    false
  end


end

我的用户控制器

class UsersController < ApplicationController
  before_filter :authenticate_user! 
  before_action :set_user, only: [:show, :edit, :update, :destroy]

  # GET /users
  # GET /users.json
  def index
    @users = User.all
  end

  # GET /users/1
  # GET /users/1.json
  def show
  end

  # GET /users/new
  def new
    @user = User.new …

我正在使用Rails应用程序,在尝试添加"编辑事件"链接后,我一直收到以下错误.

No route matches {:action=>"edit", :controller=>"events"} missing required keys: [:id]

下面是我的index.html.haml

.event_con
  %h1 Things you've done
  - @events_own.each do |event|
    .event_title
      = event.activity
    .event_rating
      %strong Rating : 
      = event.rating
      &#47 10
    .event_when
      %strong Started : 
      = event.time.to_s(:short)
    .event_end
      %strong Ended : 
      = event.timetwo.to_s(:short)
    .event_notes
      %strong Notes :
      = event.notes

    = link_to "Edit", edit_event_path

这是我的事件控制器:

class EventsController < ApplicationController
  before_action :set_event, only: [:show, :edit, :update, :destroy]
  before_action :authenticate_user!

  # GET /events
  # GET /events.json
  def index
    @events = Event.all.order("created_at DESC")
    @events_own …