rails中缺少模板错误

Question

new.html is a registration form ,which creates tutor account . It involves error handling . _error_messages.html.erb is the file which handles the error ,like should be filling in all text fields . eg , showing : `

The form contains 3 errors.

    Name can't be blank
    Password confirmation can't be blank
    Password confirmation doesn't match Password

However ,when submits the form without any input in new.html ,it shows the error

Missing template tutors/register, application/register with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:erb, :builder, :raw, :ruby, :coffee, :jbuilder]}. Searched in: * "C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/web-console-2.0.0/lib/action_dispatch/templates" * "D:/Sites/abc/app/views"

new.html.erb

 <% provide(:title, 'Registeration') %>
    <h1>Tutor Registration</h1>
    <div class="row">
      <div class="col-md-6 col-md-offset-3">
        <%= form_for(@tutor) do |f| %>
        <%= render 'shared/error_messages' %>

          <%= f.label :name %>
          <%= f.text_field :name, class: 'form-control' %>

          <%= f.label :email %>
          <%= f.text_field :email, class: 'form-control' %>

          <%= f.label :password %>
          <%= f.password_field :password, class: 'form-control' %>

          <%= f.label :password_confirmation, "Confirm Password" %>
          <%= f.password_field :password_confirmation, class: 'form-control' %>



     <%= f.label :gender %>
                <%= f.select(:gender, ['Male', 'Female'] , class: 'form-control' )%>


          <%= f.label :tutor_education_level %>
                    <%= f.select(:education_level, ['Bachelor', 'Master', 'Doctor'] , class: 'form-control' )%>


          <%= f.label :tutor_institution %>
          <%= f.text_field :institution, class: 'form-control' %>

                <%= f.label :tutorial_experience %>
          <%= f.text_field :experience, class: 'form-control' %>

                <%= f.label :tutor_preferred_district %>
          <%= f.text_field :district, class: 'form-control' %>

          <%= f.label :tutor_preferred_subject %>
          <%= f.text_field :subject, class: 'form-control' %>

                <%= f.label :tutor_required_student_level %>

           <%= f.select(:student_level, ['P1-P3', 'P4-P6', 'S1-S3', 'S4-S6'] , class: 'form-control' )%>


          <%= f.submit "Create tutor's account", class: "btn btn-primary" %>

        <% end %>
      </div>
    </div>

views/shared/_error_messages.html.erb

<% if @tutor.errors.any? %>
  <div id="error_explanation">
    <div class="alert alert-danger">
      The form contains <%= pluralize(@tutor.errors.count, "error") %>.
    </div>
    <ul>
    <% @tutor.errors.full_messages.each do |msg| %>
      <li><%= msg %></li>
    <% end %>
    </ul>
  </div>
<% end %>

Tutor -controller

 class TutorsController < ApplicationController
  before_action :logged_in_tutor, only: [:edit, :update]
  before_action :correct_tutor,   only: [:edit, :update]

  def index
    @tutors = Tutor.all
  end

  def show
    @tutor = Tutor.find(params[:id])
  end

  def new
    @tutor = Tutor.new
  end

  def create
    @tutor = Tutor.new(tutor_params)
    if @tutor.save
      log_in @tutor
      flash[:success] = "Congratulations! Your registration is successful!"
      redirect_to @tutor
    else
      render 'register'
    end
  end

  def edit
    @tutor = Tutor.find(params[:id])
  end

  def update
    if @tutor.update_attributes(tutor_params)
      flash[:success] = "Profile updated successfuly!"
      redirect_to @tutor
    else
      render 'edit'
    end
  end

  # Handle sign-up failure, to redirect the tutor to the registeration form again
  def tutor_params
    params.require(:tutor).permit(:name, :email, :password, :password_confirmation, :address,:gender ,:education_level,:institution,:exprience,:district,:subject,:student_level)
  end

  def logged_in_tutor
    unless logged_in?
      store_location
      flash[:danger] = "Please log in."
      redirect_to login_url
    end
  end

  def correct_tutor
    @tutor = Tutor.find(params[:id])
    redirect_to(root_url) unless current_tutor?(@tutor) 
  end
end

Answer 1

When you submit the form, request sends to the create action:

 def create
    @tutor = Tutor.new(tutor_params)
    if @tutor.save
      # if @tutor valid save it and redirect to show action
      redirect_to @tutor
    else
      # else render the register template(or action)
      render 'register'
    end
  end

In the create action there is a conditional if , in the first case all is good, @tutor has been saved and Rails call redirect to show action, otherwise Rails trying to render register template which is not exists(the errors claims about it). To resolve that issue create register template with desired html code which should run if @tutor isn't saved.