我是初学者，在注册两个步骤时遇到严重问题。
我一直收到这个错误：
First argument in form cannot contain nil or be empty
<%= form_for(@Profile) do |f| %>
用户可以使用用户表（DB）上的用户信息进行注册。一切都很好。但我真的希望他们有个人资料。所以他们可以把他们的生物放在例如。
我尝试根据用户的MVC为配置文件创建MVC结构，但它不起作用。
我一直试图找到答案。尝试了数百种变化，但没有成功。请帮忙！
views / users / new.html.erb （这是有效的）（我只是想为用户创建个人资料，并让他们能够填写他们的信息作为第二步注册）
<div class="container">
<% provide(:title, 'Sign up') %>
<h1 class="center">Sign up</h1>
<div class="row">
<div class="col s12 m10 l8 offset-m1 offset-l2">
<%= form_for(@user) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<%= f.label :first_name %>
<%= f.text_field :first_name %>
<%= f.label :genre %>
<%= f.text_field :genre %>
<%= f.label :middle_name %>
<%= f.text_field :middle_name %>
<%= f.label :last_name %>
<%= f.text_field :last_name %>
<%= f.label :preferred_name %>
<%= f.text_field :preferred_name %>
<%= f.label :email %>
<%= f.text_field :email %>
<%= f.label :password %>
<%= f.password_field :password %>
<%= f.label :password_confirmation, "Confirmation" %>
<%= f.password_field :password_confirmation %>
<div class="row center">
<%= f.submit "Create my account", class: "btn btn-large btn-primary" %>
</div>
<% end %>
</div>
</div>
</div>
models / user.rb
class User < ActiveRecord::Base
has_one :profile
has_many :microposts, dependent: :destroy
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",
class_name: "Relationship",
dependent: :destroy
has_many :followers, through: :reverse_relationships, source: :follower
before_save { self.email = email.downcase }
before_create :create_remember_token
validates :first_name, presence: true, length: { maximum: 50 }
VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-]+(\.[a-z]+)*\.[a-z]+\z/i
validates :email, presence: true, format: { with: VALID_EMAIL_REGEX },
uniqueness: { case_sensitive: false }
has_secure_password
validates :password, length: { minimum: 6 }
def User.new_remember_token
SecureRandom.urlsafe_base64
end
def User.digest(token)
Digest::SHA1.hexdigest(token.to_s)
end
def feed
Micropost.from_users_followed_by(self)
end
def following?(other_user)
relationships.find_by(followed_id: other_user.id)
end
def follow!(other_user)
relationships.create!(followed_id: other_user.id)
end
def unfollow!(other_user)
relationships.find_by(followed_id: other_user.id).destroy
end
private
def create_remember_token
self.remember_token = User.digest(User.new_remember_token)
end
end
controllers / users_controller.rb
class UsersController < ApplicationController
before_action :signed_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])
@microposts = @user.microposts.paginate(page: params[:page])
end
def new
@user = User.new
end
def create
@user = User.new(user_params)
if @user.save
sign_in @user
flash[:success] = "Welcome to the my app"
redirect_to @user
else
render 'new'
end
end
def edit
end
def update
if @user.update_attributes(user_params)
flash[:success] = "Profile updated"
redirect_to @user
else
render 'edit'
end
end
def destroy
User.find(params[:id]).destroy
flash[:success] = "just got destroyed."
redirect_to users_url
end
def following
@title = "Connections"
@user = User.find(params[:id])
@users = @user.followed_users.paginate(page: params[:page])
render 'show_follow'
end
def followers
@title = "known by"
@user = User.find(params[:id])
@users = @user.followers.paginate(page: params[:page])
render 'show_follow'
end
private
def user_params
params.require(:user).permit(:first_name, :middle_name, :last_name, :preferred_name, :email, :password,
:password_confirmation)
end
# Before filters
def correct_user
@user = User.find(params[:id])
redirect_to(root_url) unless current_user?(@user)
end
def admin_user
redirect_to(root_url) unless current_user.admin?
end
end
第二次注册页面
视图/用户/ signup2.html.erb
<div class="container">
<% provide(:title, 'Sign up2') %>
<h1 class="center">Sign up2</h1>
<div class="row">
<div class="col s12 m10 l8 offset-m1 offset-l2">
<%= form_for(@Profile) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<%= f.label :primary_instrument %>
<%= f.text_field :primary_instrument %>
<%= f.label :bio %>
<%= f.text_field :bio %>
<div class="row center">
<%= f.submit "Create my account2", class: "btn btn-large btn-primary" %>
</div>
<% end %>
</div>
</div>
</div>
models / profile.rb
class Profile < ActiveRecord::Base
belongs_to :user
end
controllers / profiles_controller.rb
class ProfilesController < ApplicationController
before_filter :get_user
def get_user
@profile = User.find(params[:user_id])
end
# generate new-profile form
def new
@user.profile = Profile.new
@profile = @user.profile
end
# process new-profile-form post
def create
@user.profile = Profile.new(params[:profile])
@profile = @user.profile
respond_to do |format|
if @profile.save
flash[:notice] = 'Profile was successfully created.'
format.html { redirect_to(@profile) }
format.xml { render :xml => @profile, :status => :created, :location => @profile }
...
end
end
end
# generate edit-profile form
def edit
@profile = Profile.find(params[:id])
end
# generate edit-profile-form post
def update
@profile = @user.profile
respond_to do |format|
if @profile.update_attributes(params[:profile])
flash[:notice] = 'Profile was successfully updated.'
# format.html { redirect_to(@profile) }
format.html { redirect_to(user_profile(@user)) }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => @profile.errors, :status => :unprocessable_entity }
end
end
end
的routes.rb
root to: 'static_pages#home'
match '/signup', to: 'users#new', via: 'get'
match '/signup2', to: 'profiles#new', via: 'get'
match '/signin', to: 'sessions#new', via: 'get'
match '/signout', to: 'sessions#destroy', via: 'delete'
match '/help', to: 'static_pages#help', via: 'get'
match '/about', to: 'static_pages#about', via: 'get'
match '/contact', to: 'static_pages#contact', via: 'get'
end
答案 0 :(得分：0)
您的@Profile变量在标记中大写，而控制器中设置的变量是大写的。在标记中重写变量，如下所示：
<%= form_for(@profile) do |f| %>
希望它有所帮助！
答案 1 :(得分：0)
除了@ Zoran的答案，你可以使用以下宝石，这将使你的生活变得简单，多阶段形式。