如何显示Rails关注用户的头像

Question

全部，我目前正在学习 Rails 并着手进行一个项目，我运行陷入 issue.I 我无法显示 [=32] 的用户的图像=] 属于。

当我转到主页时，我应该会看到您正在关注的用户的 post...不幸的是，我不确定如何显示 [=] 用户的图像32=] 属于....我可以展示他们的 post 但不确定我如何展示他们的形象。我必须说我正在使用回形针 gem.

用户模型

class User < ActiveRecord::Base

# 包括默认设计模块。其他可用的是： # :confirmable, :lockable, :timeoutable 和 :omniauthable 设计 :database_authenticatable, :registerable, ：可恢复，：可记忆，：可跟踪，：可验证 has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100#" }, :default_url => "/images/:style/missing .png" validates_attachment_content_type :avatar, :content_type => /\Aimage/.*\Z/

     has_many :followeds, through: :relationships
      has_many :relationships, foreign_key: "follower_id", dependent: :destroy
     has_many :followed_users, through: :relationships, source: :followed
     has_many :reverse_relationships, foreign_key: "followed_id"
     has_many :reverse_relationships, foreign_key: "followed_id",
                               class_name:  "Relationship",
                               dependent:   :destroy
     has_many :followers, through: :reverse_relationships, source: :follower


     has_many:avatar, dependent: :destroy
     has_many :posts, dependent: :destroy # remove a user's posts if his account is deleted.
     has_many :active_relationships, class_name: "Relationship", foreign_key: "follower_id", dependent: :destroy
     has_many :passive_relationships, class_name: "Relationship", foreign_key: "followed_id", dependent: :destroy

     has_many :following, through: :active_relationships, source: :followed
     has_many :followers, through: :passive_relationships, source: :follower




    def avatar_url
    avatar.url(:medium)
    end

     # helper methods

     # follow another user
     def follow(other)
       active_relationships.create(followed_id: other.id)
     end

     # unfollow a user
     def unfollow(other)
       active_relationships.find_by(followed_id: other.id).destroy
     end

     # is following a user?
     def following?(other)
       following.include?(other)

     end
     end

我可以获得当前用户的图像，但是如果我登录我的帐户，并且我正在关注某人，我想看到他们的图像而不是我的图像，因为他们关联 post..

             <%=image_tag(current_user.avatar.url, class: "img-circle img-responsive img-raised", :size => "100x100") %>

Answer 1

你的 post 必须在数据库中有 belongs_to :user 和 user_id，然后你可以这样做：

@posts.each do |post|
  <%=image_tag(post.user.avatar.url, class: "img-circle img-responsive img-raised", :size => "100x100") %>
end

但我看到你有 has_many :avatar 可能是你在此处编码 post 的错误，如果不是你必须先 select 你想要 avatar_url使用。

如何显示Rails关注用户的头像

How to show the gravatar of the user who is following in Rails

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avatar

用户模型