阿凡達未向用戶顯示

我使用devise作爲我的用戶身份驗證和載波圖像上傳寶石。現在一切正常，頭像被保存在users表中並顯示在索引視圖中;但不在展示視圖內。阿凡達未向用戶顯示

爲了使我的問題有點更加清晰：

索引視圖中，化身獲取的成功所示。

裏面的表演來看，化身下降到默認的圖像，因爲@user.avatar是blank/nil

顯示代碼：

<div class="well"> 
     <div class="media"> 
     <a class="pull-left"> 
     <% if @user.avatar.blank? %> 
      <img src="http://www.adtechnology.co.uk/images/UGM-default-user.png" style="width: 75px;"> 
     <% elsif @user.avatar %> 
      <%= image_tag @user.avatar, :style => "width:75px;" %> 
     <% end %> 
     </a> 
     <div class="media-body"> 
      <p>About <%= link_to @question.user.username, @question.user, :class => " bg" %></p> 
     </div> 
     <p class="text-muted small">Apparently this user doesn't like to share his information.</p> 
    </div> 
    </div>

問題控制器：

class QuestionsController < ApplicationController 
    before_action :set_question, only: [:show, :edit, :update, :destroy] 

    respond_to :html 

    def index 
    @questions = Question.all 
    respond_with(@questions) 
    end 

    def show 
    @user = User.find(params[:id]) 
    respond_with(@question) 
    end 

    def new 
    if user_signed_in? 
     @question = current_user.questions.build 
     respond_with(@question) 
    else 
     redirect_to new_user_session_path 
    end 
    end 

    def edit 
    end 

    def create 
    @question = current_user.questions.build(question_params) 
    @question.save 
    respond_with(@question) 
    end 

    def update 
    @question.update(question_params) 
    respond_with(@question) 
    end 

    def destroy 
    @question.destroy 
    respond_with(@question) 
    end 

    private 
    def set_question 
     @question = Question.find(params[:id]) 
    end 

    def question_params 
     params.require(:question).permit(:title, :description) 
    end 
end

用戶模型：

class User < ActiveRecord::Base 
    mount_uploader :avatar, AvatarUploader 
    has_many :questions, :dependent => :destroy 


    devise :database_authenticatable, :registerable, 
     :recoverable, :rememberable, :trackable, :validatable 
end

問題模型：

<% if @question.user.avatar.blank? %> 
    <img src="http://www.adtechnology.co.uk/images/UGM-default-user.png" style="width: 75px;"> 
<% elsif @question.user.avatar %> 
    <%= image_tag @question.user.avatar, :style => "width:75px;" %> 
<% end %>

來源

2016-02-21 Raymond

我通過改變show.html.erb內這些線固定它由於show動作的約在QuestionController中，params[:id]將會是@question的ID。您應該使用@question.user來指作者@question：

def show 
    @user = @question.user 
    respond_with(@question) 
end

來源

2016-02-21 11:08:15 Raymond

def show 
    @user = User.find(params[:id]) 
    respond_with(@question) 
end

：

class Question < ActiveRecord::Base 
    belongs_to :user 
end

來源

2016-02-21 11:11:34 Harfangk

阿凡達未向用戶顯示

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