如何在这里修改图片大小?:
var image = new Image();
image.src = 'http://www.ziiweb.com/images/logo.png';
image.width = 200; //this is not modifying the width of the image
$('canvas').css({
background: 'url(' + image.src + ')'
});
<script src="https://ajax.googleapis.
我的模型是:(使用mongoid version2)
class Trip
include Mongoid::Document
include Mongoid::Timestamps
include Mongoid::MultiParameterAttributes
field :images, :type => Array, :default => []
end
我可以搜索出图片大小不为0的条目,方法是:
Trip.where(:images.size => 1).size #=>1, correct
而此方法不能用于搜索空数组字段:
Trip.wh