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我正在創建數據庫網站。爲了進行任何編輯，用戶需要登錄該網站。用戶也可以註冊。目前，您可以登錄/註銷。如果你想註冊，用戶必須註銷，然後才能註冊。Rails：特定身份驗證用戶
我想更改此身份驗證，爲了訪問註冊頁面，某個登錄的用戶可以註冊一個用戶。換句話說，除非管理員登錄並且管理員爲新用戶創建帳戶，否則註冊選項不會顯示。我將如何更改我的代碼來執行此操作？
new.html.erb /確認
<h2>Resend confirmation instructions</h2>
<%= form_for(resource, as: resource_name, url: confirmation_path(resource_name), html: { method: :post }) do |f| %>
<%= devise_error_messages! %>
<div class="field">
<%= f.label :email %><br />
<%= f.email_field :email, autofocus: true, value: (resource.pending_reconfirmation? ? resource.unconfirmed_email : resource.email) %>
</div>
<div class="actions">
<%= f.submit "Resend confirmation instructions" %>
</div>
<% end %>
<%= render "devise/shared/links" %>
new.html.erb /登記
<article class = "sign" >
<%= form_for(resource, as: resource_name, url: registration_path(resource_name)) do |f| %>
<%= devise_error_messages! %>
<div class="field">
<%= f.label :email %><br />
<%= f.email_field :email, autofocus: true %>
</div>
<div class="field">
<%= f.label :password %>
<% if @minimum_password_length %>
<em>(<%= @minimum_password_length %> characters minimum)</em>
<% end %><br />
<%= f.password_field :password, autocomplete: "off" %>
</div>
<div class="field">
<%= f.label :password_confirmation %><br />
<%= f.password_field :password_confirmation, autocomplete: "off" %>
</div>
<div class="actions">
<%= f.submit "Sign up" %>
</div>
<% end %>
<%= render "devise/shared/links" %>
</article>
創建用戶遷移
class DeviseCreateUsers < ActiveRecord::Migration[5.1]
def change
create_table :users do |t|
## Database authenticatable
t.string :email, null: false, default: ""
t.string :encrypted_password, null: false, default: ""
## Recoverable
t.string :reset_password_token
t.datetime :reset_password_sent_at
## Rememberable
t.datetime :remember_created_at
## Trackable
t.integer :sign_in_count, default: 0, null: false
t.datetime :current_sign_in_at
t.datetime :last_sign_in_at
t.string :current_sign_in_ip
t.string :last_sign_in_ip
## Confirmable
# t.string :confirmation_token
# t.datetime :confirmed_at
# t.datetime :confirmation_sent_at
# t.string :unconfirmed_email # Only if using reconfirmable
## Lockable
# t.integer :failed_attempts, default: 0, null: false # Only if lock strategy is :failed_attempts
# t.string :unlock_token # Only if unlock strategy is :email or :both
# t.datetime :locked_at
t.timestamps null: false
end
add_index :users, :email, unique: true
add_index :users, :reset_password_token, unique: true
# add_index :users, :confirmation_token, unique: true
# add_index :users, :unlock_token, unique: true
end
end
用戶模型
class User < ApplicationRecord
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
end
edit.html.erb /登記
<h2>Edit <%= resource_name.to_s.humanize %></h2>
<%= form_for(resource, as: resource_name, url: registration_path(resource_name), html: { method: :put }) do |f| %>
<%= devise_error_messages! %>
<div class="field">
<%= f.label :email %><br />
<%= f.email_field :email, autofocus: true %>
</div>
<% if devise_mapping.confirmable? && resource.pending_reconfirmation? %>
<div>Currently waiting confirmation for: <%= resource.unconfirmed_email %> </div>
<% end %>
<div class="field">
<%= f.label :password %> <i>(leave blank if you don't want to change it)</i><br />
<%= f.password_field :password, autocomplete: "off" %>
<% if @minimum_password_length %>
<br />
<em><%= @minimum_password_length %> characters minimum</em>
<% end %>
</div>
<div class="field">
<%= f.label :password_confirmation %><br />
<%= f.password_field :password_confirmation, autocomplete: "off" %>
</div>
<div class="field">
<%= f.label :current_password %> <i>(we need your current password to confirm your changes)</i><br />
<%= f.password_field :current_password, autocomplete: "off" %>
</div>
<div class="actions">
<%= f.submit "Update" %>
</div>
<% end %>
<h3>Cancel my account</h3>
<p>Unhappy? <%= button_to "Cancel my account", registration_path(resource_name), data: { confirm: "Are you sure?" }, method: :delete %></p>
<%= link_to "Back", :back %>
new.html.erb /會話
<body>
<div class = "head">
<h1>Log In</h1>
<div class = "image1" >
<img src= "http://dx.deucex.com/i/logo.png" >
</div>
</div>
</body>
<article class = "sign">
<%= form_for(resource, as: resource_name, url: session_path(resource_name)) do |f| %>
<div class="field">
<%= f.label :email %><br />
<%= f.email_field :email, autofocus: true %>
</div>
<div class="field">
<%= f.label :password %><br />
<%= f.password_field :password, autocomplete: "off" %>
</div>
<% if devise_mapping.rememberable? -%>
<div class="field">
<%= f.check_box :remember_me %>
<%= f.label :remember_me %>
</div>
<% end -%>
<div class="actions">
<%= f.submit "Log in" %>
</div>
<% end %>
<%= render "devise/shared/links" %>
</article>
的代碼示例片，其中用戶只能編輯如果在
...
<% if user_signed_in? %>
<%= button_to "New Vendor", new_vendor_path, :method => "get" %>
<% end %>
<%= button_to "Inventory", inventories_path, :method => "get" %>
<%= form_tag vendors_path, :method => "get" do %>
<%= text_field_tag :search, params[:search] %>
<%= submit_tag "Search", :contact_name => nil %>
<% end %>
...