我正在尝试从railstutorial修改Michael Hartl示例应用程序。
我的static_pages控制器看起来像这样：
class StaticPagesController < ApplicationController
def home
if logged_in?
@micropost = current_user.microposts.build
@feed_items = current_user.feed.paginate(page: params[:page])
end
end
def help
end
def about
end
def contact
end
end
和我得到这样的错误消息：
NoMethodError in StaticPagesController#home
undefined method `microposts' for #<User:0x00000004d39d58>
else
match = match_attribute_method?(method.to_s)
match ? attribute_missing(match, *args, &block) : super
end
end
用户模型：
class User < ActiveRecord::Base
has_many :listings, :class_name => "Micropost", :foreign_key => "seller_id", dependent: :destroy
has_many :bids, foreign_key: "bidder_id"
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
attr_accessor :remember_token, :activation_token, :reset_token
before_save :downcase_email
before_create :create_activation_digest
validates :name, presence: true, length: { maximum: 50 }
VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
validates :email, presence: true, length: { maximum: 255 },
format: { with: VALID_EMAIL_REGEX },
uniqueness: {case_sensitive: false}
has_secure_password
validates :password, length: { minimum: 6 }, allow_blank: true
def to_s
self.name
end
# Returns the hash digest of the given string.
def User.digest(string)
cost = ActiveModel::SecurePassword.min_cost ? BCrypt::Engine::MIN_COST :
BCrypt::Engine.cost
BCrypt::Password.create(string, cost: cost)
end
# Returns a random token.
def User.new_token
SecureRandom.urlsafe_base64
end
# Remembers a user in the database for use in persistent sessions.
def remember
self.remember_token = User.new_token
update_attribute(:remember_digest, User.digest(remember_token))
end
# Returns true if the given token matches the digest.
def authenticated?(attribute, token)
digest = send("#{attribute}_digest")
return false if digest.nil?
BCrypt::Password.new(digest).is_password?(token)
end
# Forgets a user.
def forget
update_attribute(:remember_digest, nil)
end
# Activates an account.
def activate
update_attribute(:activated, true)
update_attribute(:activated_at, Time.zone.now)
end
# Sends activation email.
def send_activation_email
UserMailer.account_activation(self).deliver_now
end
# Sets the password reset attributes.
def create_reset_digest
self.reset_token = User.new_token
update_attribute(:reset_digest, User.digest(reset_token))
update_attribute(:reset_sent_at, Time.zone.now)
end
# Sends password reset email.
def send_password_reset_email
UserMailer.password_reset(self).deliver_now
end
# Returns true if a password reset has expired.
def password_reset_expired?
reset_sent_at < 2.hours.ago
end
def show
@user = User.find(params[:id])
@microposts = @user.microposts.paginate(page: params[:page])
end
# Defines a proto-feed.
# See "Following users" for the full implementation.
# Returns a user's status feed.
def feed
following_ids = "SELECT followed_id FROM relationships
WHERE follower_id = :user_id"
Micropost.where("seller_id IN (#{following_ids})
OR seller_id = :seller_id", seller_id: id)
end
# Follows a user.
def follow(other_user)
active_relationships.create(followed_id: other_user.id)
end
# Unfollows a user.
def unfollow(other_user)
active_relationships.find_by(followed_id: other_user.id).destroy
end
# Returns true if the current user is following the other user.
def following?(other_user)
following.include?(other_user)
end
private
# Converts email to all lower-case.
def downcase_email
self.email = email.downcase
end
# Creates and assigns the activation token and digest.
def create_activation_digest
self.activation_token = User.new_token
self.activation_digest = User.digest(activation_token)
end
end
用户控制器
class UsersController < ApplicationController
before_action :logged_in_user, only: [:index, :edit, :update, :destroy,
:following, :followers]
before_action :correct_user, only: [:edit, :update]
before_action :admin_user, only: :destroy
def index
@users = User.paginate(page: params[:page])
end
def show
@user = User.find(params[:id])
@micropost = @user.microposts.build
@microposts = @user.microposts.paginate(page: params[:page])
end
def new
@user = User.new
end
def create
@user = User.new(user_params)
if @user.save
@user.send_activation_email
flash[:info] = "Please check your email to activate your account."
redirect_to root_url
else
render 'new'
end
end
def edit
@user = User.find(params[:id])
end
def destroy
User.find(params[:id]).destroy
flash[:success] = "User deleted"
redirect_to users_url
end
def update
@user = User.find(params[:id])
if @user.update_attributes(user_params)
flash[:success] = "Profile updated"
redirect_to @user
else
render 'edit'
end
end
def following
@title = "Following"
@user = User.find(params[:id])
@users = @user.following.paginate(page: params[:page])
render 'show_follow'
end
def followers
@title = "Followers"
@user = User.find(params[:id])
@users = @user.followers.paginate(page: params[:page])
render 'show_follow'
end
private
def user_params
params.require(:user).permit(:name, :email, :password,
:password_confirmation)
end
# Before filters
# Confirms a logged-in user.
def logged_in_user
unless logged_in?
store_location
flash[:danger] = "Please log in."
redirect_to login_url
end
end
# Confirms the correct user.
def correct_user
@user = User.find(params[:id])
redirect_to(root_url) unless current_user?(@user)
end
# Confirms an admin user.
def admin_user
redirect_to(root_url) unless current_user.admin?
end
end
我不确定这个问题是与控制器实现或视图或meybe微博实现有关。请gyus帮助完成导轨菜鸟
模型的第一行是：
class User < ActiveRecord::Base
has_many :listings, :class_name => "Micropost", :foreign_key => "seller_id", dependent: :destroy
在您的用户模型中，您应该：
class User < ActiveRecord::Base
has_many :microposts, dependent: :destroy
你定义了：
has_many :listings, :class_name => "Micropost", :foreign_key => "seller_id"
所以你必须使用：
@micropost = current_user.listings.build
而不是你的：
@micropost = current_user.microposts.build
原因是Rails将:listings作为关系的“官方名称”。指定:class_name => "Micropost"时 - 对于Rails，表示实际名称。因此，您可以根据需要使用尽可能多的正式名称来实现一个实际依赖。