为什么不能在Rails中创建新记录？

Question

我正在尝试创建新的主持人：

index.erb

<%= link_to 'add new user', new_admin_moderator_path %>

Routes.rb

namespace :admin do
    resources :moderator
  end

moderator_controller.rb

 def new
   @moderator = Moderator.new
 end
 def create
   @moderator = Moderator.new(moderator_params)
   if @moderator.save
     redirect_to admin_moderator_index_url
   else
     render 'new'
   end
 end

 private
   def moderator_params
        params.require(:moderator).permit(:id, :fullname, :username, :password)
   end

new.erb

<h1>Create new</h1>
<%= form_for [:admin , @moderator] do |u| %>
    <p>
        <%= u.lable :fullname %>
        <%= u.text_field :fullname %>
    </p>
    <p>
        <%= u.lable :username %>
        <%= u.text_field :username %>
    </p>
    <p>
        <%= u.lable :password %>
        <%= u.password_field :password %>
    </p>
    <p>
        <%= u.submit %>
    </p>
<% end %>

它显示如下错误：

views/admin/moderator/new.erb where line #2 raised:
NoMethodError in Admin::Moderator#new
    undefined method `admin_moderators_path' for #<#<Class:0x607ce90>:0x907a0d0>
    Did you mean?  admin_moderator_path,
                   admin_moderator_index_path,
                   admin_moderator_url
Extracted source (around line #2):
<h1>Create new</h1> <%= form_for [:admin , @moderator] do |u| %> <p> <%= u.lable :fullname %> <%= u.text_field :fullname %> </p>

Answer 1

在您的new.html.erb

中更改此行

create table Pipeline
(
    ID int identity
    , Received_Date Date
    , Received_Count Int
)

Insert Into Pipeline
select '01/01/2018', 75 + (RAND() * 50)
union all select '01/15/2018', 75 + (RAND() * 50)
union all select '02/01/2018', 75 + (RAND() * 50)
union all select '02/15/2018', 75 + (RAND() * 50)
union all select '03/01/2018', 75 + (RAND() * 50)
union all select '03/15/2018', 75 + (RAND() * 50)
union all select '04/01/2018', 75 + (RAND() * 50)
union all select '04/15/2018', 75 + (RAND() * 50)
union all select '05/01/2018', 75 + (RAND() * 50)
union all select '05/15/2018', 75 + (RAND() * 50)
union all select '06/01/2018', 75 + (RAND() * 50)
union all select '06/15/2018', 75 + (RAND() * 50)


select * from Pipeline        -- so you can see the values you got

select 
    P1.Received_Date
    , (Select Sum(P2.Received_Count)
        from Pipeline as P2
        Where P2.Received_Date > DateAdd(MONTH, -3, P1.Received_Date) 
        and P2.Received_Date <= P1.Received_Date
        ) As Pipeline_Total
from Pipeline as P1