Question

我的活动模型代码是这样的：

def current_date
    Date.today
end

def self.count_past(current_date = Date.today)
   Event.count :all, :conditions => ['start_date < ?', current_date], :order => 'start_date'
end

def self.count_upcoming(current_date = Date.today)
   Event.count :all, :conditions => ['start_date > ?', current_date], :order => 'start_date'
   #this statment is equivalent to
   #select * from events where start_date > current_date order by start_date
end

def self.count_today(current_date = Date.today)
    Event.count :all, :conditions => ['start_date = ?', current_date], :order => 'start_date'
end

我的view(index file)代码是这样的：

%li
  %a.tt-top-center{:title => "Total Events", :href => events_path}#{Event.all.size}
  %span Total events
%li
  %a.blue.tt-top-center{:title => "Today's Events", :href => events_path(:view => "today")}#{Event.count_today}
  %span Today's Events
%li
  %a.green.tt-top-center{:title => "Past Events", :href => events_path(:view => "past")}#{Event.count_past}
  %span Past Events
%li
  %a.tt-top-center{:title => "Upcoming Events", :href => events_path(:view => "upcoming")}#{Event.count_upcoming} 
  %span Upcoming Events

我的controllers代码是这样的： def index

case params[:view]
when 'past'
  @events  = Event.find (:all, :conditions => ['start_date < ?', current_date], :order => 'start_date')
when 'today'
  @events = Event.find (:all, :conditions => ['(start_date  = current_date)'], :order => 'start_date ')
when 'upcoming'
  @events = Event.find(:all, :conditions => ['start_date > ?', current_date], :order => 'start_date')
else
  @events = Event.all
end
  end

请点击各个链接ajax，today's events等，告诉我如何使用total events？如何使用jquery <更新事件计数？ / p>

Answer 1

您必须使用:remote => true进行AJAX调用。

为此，您需要在控制器方法中添加一个响应js（respond_to）的format.js块。有关respond_to的更多信息。

然后，这将在您的视图中执行相应的.js.erb文件。从那里，您可以使用javascript更新视图（并更新事件计数）。

使用AJAX on Rails的一个很好的起点。

如何用ajax更新计数

1 个答案: