我创建了一个相册模型和一个照片模型，并将其添加到现有的 Rails 应用程序中。我已经使照片模型属于相册模型，并且相册模型属于属于用户模型的现有配置文件模型。我不知道我是否将它们关联错误以及为什么会出现错误。
值得注意的是，当我转到 URL/albums 时，一切正常，但是当我转到 URL/profiles/1 时（下面的代码粘贴在 views/profile/ 文件夹中的 show.html.erb 文件中）然后我收到以下错误。
这是一个我无法解决的简单问题。四个模型文件如下：
专辑.rb:
class Album < ActiveRecord::Base
belongs_to :profile
has_many :photos, :dependent => :destroy
accepts_nested_attributes_for :photos, :allow_destroy => true
end
简介.rb：
class Profile < ActiveRecord::Base
belongs_to :user
has_many :albums
def self.get_location(profile)
location = []
location << profile.city unless profile.city.blank?
location << profile.state unless profile.state.blank?
location << profile.country unless profile.country.blank?
location << profile.postal_code unless profile.postal_code.blank?
location
end
def self.missing_fields(profile)
missing = []
if profile.first_name.blank?
missing << "first name"
end
if profile.last_name.blank?
missing << "last name"
end
if profile.job_title.blank?
missing << "job title"
end
missing
end
end
照片.rb：
require 'paperclip'
class Photo < ActiveRecord::Base
belongs_to :album
has_attached_file :upload,
:url => "/images/:id/:style/:basename.:extension",
:path => ":rails_root/public/images/:id/:style/:basename.:extension",
:styles => {
:thumb => "75x75>",
:small => "200x200>"
}
#add in any validations you may want
end
用户.rb：
class User < ActiveRecord::Base
include Gravtastic
gravtastic :size => 120
# associations
has_many :albums
has_many :photos, :through => :albums
has_many :authorizations, :dependent => :destroy
has_one :profile, :dependent => :destroy
has_many :resumes, :dependent => :destroy, :order => 'created_at DESC'
has_many :thoughts, :dependent => :destroy, :order => 'created_at DESC'
has_many :user_threads, :dependent => :destroy, :order => 'created_at ASC'
accepts_nested_attributes_for :profile
# virtual attributes
attr_accessor :first_name, :last_name
# validations
validates_presence_of :first_name
validates_presence_of :last_name
validates_length_of :username, :minimum => 4, :message => " is too short"
validates :email, :email => {:message => " is not valid"}
validates_uniqueness_of :email, :case_sensitive => false
validates_uniqueness_of :username, :case_sensitive => false
validates_length_of :password, :minimum => 4, :message => " is too short"
# authlogic
acts_as_authentic do |config|
config.crypto_provider = Authlogic::CryptoProviders::MD5
config.maintain_sessions = false
config.validate_email_field = false
config.validate_login_field = false
config.validate_password_field = false
config.login_field = :email
config.validate_login_field = false
end
def self.create_from_hash!(hash)
user = User.new(:username => Time.now.to_i, :email => '', :auth_provider => hash['provider'])
user.save(:validate => false)
if hash['provider'].downcase == 'twitter'
user.profile = Profile.create(:first_name => Twitter::Client.new.user(hash['user_info'] ['nickname'].to_s).name)
else
user.profile = Profile.create(:first_name => hash['user_info']['first_name'], :last_name => hash['user_info']['last_name'])
end
user
end
def deliver_password_reset_instructions!
reset_perishable_token!
UserMailer.deliver_password_reset_instructions(self)
end
def activate!
self.active = true
save(false)
end
def deliver_activation_instructions!
reset_perishable_token!
UserMailer.deliver_activation_instructions(self)
end
end
配置文件控制器有这个片段：
def show
@user = User.find_by_username(params[:id])
@profile = @user.profile
@location = Profile.get_location(@profile)
@resumes = @user.resumes
@albums = @user.albums
@photos = @user.photos
@thoughts = @user.thoughts
@shouts = UserThread.find_profile_shouts(@profile)
@shouters = UserThread.find_shouters(@shouts)
@user_thread = UserThread.new
end
视图有这个：
<div id="profile_right_col">
<h2>Albums</h2>
<p>
<b>Name:</b>
<%= @albums %><br />
<% @albums.photos.each do |photo| %>
<h3><%= photo.title %></h3>
<%= image_tag photos.upload.url(:small) %>
<% end %>
</p>
<%= link_to 'Edit', edit_album_path(@albums) %> |
<%= link_to 'Back', albums_path %>
</div>
动作控制器异常显示：
ActiveRecord::StatementInvalid in Profiles#show
Showing /Users/pawel/Ruby/Apps/cvf/app/views/profiles/show.html.erb where line #137 raised:
SQLite3::SQLException: no such column: albums.user_id: SELECT "albums".* FROM "albums" WHERE ("albums".user_id = 4)
Extracted source (around line #137):
<h2>Albums</h2>
<p>
<b>Name:</b>
<%= @albums %><br />
<% @albums.photos.each do |photo| %>
<h3><%= photo.title %></h3>