Question

我的表格通过ajax添加了新行。

_group.html.erb

$("#grouptable").prepend('<%= j render(@group)%>');

create.js.rb

<table class="table table-striped">
  <thead>
  <tr>
    <th>title</th>
    <th>ID</th>
    <th></th>
  </tr>
  </thead>

  <tbody id="grouptable">

  <%= content_tag_for(:tr, @groups) do |group| %>
      <td><%= group.title %></td>
      <td><%= group.owner_id %></td>
      <td>
        <%= link_to 'edit', edit_group_path(:id => group.id), class: "btn btn-primary btn-xs" %>
        <%= link_to 'delete', group, remote: true, method: :delete,  data: { confirm: 'sure?' },
                    class: "btn btn-danger btn-xs" %>
      </td>

  <% end %>

  </tbody>

</table>

_table.html.erb

:new_folow

通过API请求检索数据的后台作业。工作完成后，记录的false字段变为:new_follow。如何定期刷新此行，直到true条件为while :new_follow == true do refresh prepended row every 5 seconds end？

换句话说：

override func drawRect(rect: CGRect) {
    let width  = 200
    let height = 300
    let boundingBox = CGRectMake(0, 0, CGFloat(width), CGFloat(height))
    let context = createBitmapContext(width, height)

    let data = CGBitmapContextGetData(context)

    let pixels = UnsafeMutablePointer<CUnsignedChar>(data)
    var n = 0
    for var j = 0; j < height; j++ {
        for var i = 0; i < width; i++ {
            pixels[n++] = 0 //B
            pixels[n++] = 255 //G
            pixels[n++] = 0 //R
            pixels[n++] = 255 //A
        }
    }
    let image = CGBitmapContextCreateImage(context!)
    if let currentContext: CGContext! = UIGraphicsGetCurrentContext() {
        UIImagePNGRepresentation(UIImage(CGImage:image!))?.writeToFile("/Users/admin/Desktop/aaaaa.png", atomically: true)
        CGContextDrawImage(currentContext, boundingBox, image)
    }
}

Answer 1

在你的js中

var newFollow = true;
var getNewRow = function(){
 if(newFollow){
    $.ajax({
       // ur call here 
    })
  }else{
    clearInterval(interval);
  }
}
var interval = setInterval("getNewRow",5000);

在你的create.js.erb

中

$("#grouptable").prepend('<%= j render(@group)%>');
newFollow = // model.new_follow, this should be true or false;

我希望这会有所帮助。

如何刷新表行直到db条件？

1 个答案: