我创建了一个具有以下属性的Micropost模型:
<Micropost id: 1, content: "test", user_id: 1, created_at: "2012-01-25 15:34:30", updated_at: "2012-01-29 11:07:53", title: "asdasdad">
具有以下属性的用户模型:
<User id: 1, email: "alex@gmail.com", username: nil, etc...>
以及具有以下属性的Comment模型:
<Comment id: 1, content: "sdf", micropost_id: 1, user_id: nil, created_at: "2012-01-29 11:10:42", updated_at: "2012-01-29 11:10:42">
到目前为止,我只完成了这个:
显示微博评论作者的 ID
<h2>Micropost Index</h2>
<% @microposts.each do |micropost| %>
<%= micropost.title %></td>
<%= micropost.content %></td>
<%= link_to 'Show', micropost %></td>
<%= link_to 'Edit', edit_micropost_path(micropost) %></td>
<%= link_to 'Destroy', micropost, confirm: 'Are you sure?', method: :delete %>
<h2>Comments</h2>
<% @micropost.comments.each do |comment| %>
<p>
<b>Comment:</b>
<%= comment.content %>
</p>
<p>
<b>Commenter</b>
<%= comment.user_id %>
</p>
<% end %>
我不知道如何创建作者个人资料的链接(例如mysite.com/users/1)。
修改
型号:
user.rb:
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable,
:omniauthable
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :password, :password_confirmation, :remember_me, :username
has_many :microposts
has_many :comments
def self.find_for_facebook_oauth(access_token, signed_in_resource=nil)
data = access_token.extra.raw_info
if user = User.where(:email => data.email).first
user
else # Create a user with a stub password.
User.create!(:email => data.email, :password => Devise.friendly_token[0,20])
end
end
end
micropost.rb:
class Micropost < ActiveRecord::Base
attr_accessible :title, :content
belongs_to :user
has_many :comments
end
comment.rb:
class Comment < ActiveRecord::Base
attr_accessible :content, :user_id
belongs_to :micropost
belongs_to :user
end
Micropost控制器:
控制器/ microposts.rb
def show
@micropost = Micropost.find(params[:id])
end
def new
@micropost = Micropost.new
end
def create
@user = current_user
@micropost = @user.microposts.new(params[:micropost])
@micropost.save
redirect_to @micropost
end
有任何建议可以实现这一目标吗?
答案 0 :(得分:2)
要建立用户链接,您可以使用
<%= link_to comment.user.username, comment.user %>
一般来说,“Rails Magic”的一部分是,如果正确设置关联,则可以通过点表示法访问相关对象。这意味着,您不需要说comment.user_id
,而是直接转到相关的用户对象,例如comment.user.username
或comment.user.email
...您明白了这一点:)
为此,您应该像这样设置模型:
class User < ActiveRecord::Base
validates_presence_of :username #username should obviously not allow nil values
has_many :microposts
has_many :comments
end
class MicroPost < ActiveRecord::Base
belongs_to :user
end
class Comment < ActiveRecord::Base
belongs_to :user
end
答案 1 :(得分:1)
# Link:
=link_to "User profile", user_path(comment.user)
# Name of the author
=comment.user.username
或者因为Micropost
和Comment
# Link:
=link_to "User profile", (@micropost.user)
# Name of the author
=@micropost.user.username