Question

我是关于Ruby on Rails的新手......

我想在我的应用中，在我的会议页面上显示：按钮＆＃34;预订座位＆＃34;如果尚未为会议预订current_user或显示信息＆＃34;已预订＆＃34;如果已经为会议预订了current_user。（只有管理员才能创建会议）

我正在使用设计..

我知道这并不难，但我没有成功摆脱这个功能。

提前致谢。

这是我的代码：

meetings.html.erb：

  <% @meetings.each do |meeting| %>
  <div class="col-xs-12 col-sm-4">
    <div class="panel panel-default box-shadow">
      <div class="panel-body">
        <div class="col-xs-12 text-center">
          <strong><%= meeting.name %></strong>
          <br><%= meeting.details %><hr>
        </div>
        <div class="col-xs-12 text-center">
          <%= image_tag "place.png", heigth:15, width: 30 %> <strong><%= meeting.address %></strong><br>
          <%= image_tag "date.png", heigth:20, width: 45 %> <%= meeting.start_time.strftime("%d/%m/%Y") %>
          <hr>
          <% if user_signed_in? %>
          <% if meeting == current_user.meetings %>
          Already booked
          <% else %>

          <%= link_to "Book a seat", meeting_participate_path(meeting), method: :post, class: 'btn btn-md btn-info' %><br>
          <% end %>
          <% else %>
          <%- if controller_name != 'sessions' %>
          <%= link_to "connectez-vous", new_session_path(resource_name), class:"btn btn-info" %><br />
          <% end -%>
          <% end %>
        </div>
      </div>
    </div>
  </div>
<% end %>

MeetingController.rb：

    def index
     @meetings = Meeting.where('start_time > ?', Time.now)
    end

  def create
    @meeting = current_user.meetings.create(meeting_params)
    if @meeting.save
      redirect_to meetings_path
    else
      render :new
    end
  end

  def participate
   meeting = Meeting.find(params[:meeting_id])
   current_user.meetings << meeting
   redirect_to meetings_path, alert: "Booked on the meeting"
 end

     private
    def set_meeting
      @meeting = Meeting.find(params[:id])
    end

    def meeting_params
      params.require(:meeting).permit(:name, :details, :address, :start_time, :highlight, :user_id)
    end

Answer 1

您可以按照以下步骤

来实现这一目标

在#=> Check if already added? def meeting_already_added?(id) meeting = Meeting.find(id) return false unless meeting user_meetings.where(meeting_id: meeting.id).exists? end #=> Pass id by following method def can_book_meeting?(id) !meeting_already_added?(id) end

上

meetings.html.erb

在<% if user_signed_in? %> # Check user signed in? <% if current_user.can_book_meeting?(meeting.id) %> # current_user added already? if not then... <%= link_to "Book a seat", meeting_participate_path(meeting), method: :post, class: 'btn btn-md btn-info' %><br> <% else %> Already booked <% end %> <% else %> # Not signed in Please SignIn <% end %>

上

before_action :authenticate_user!, only: [:create, :participate]

通过在控制器顶部添加此行来为用户添加限制，该行需要对用户进行身份验证。

["3a67ef_V1", "3a67ef", "2b678_V1", "1b", "3a67ef_V2", "2b678_V2", "2b678"]

Rails：显示current_user的按钮或显示已预订的其他消息

1 个答案: