如何重新加载/重新订阅以在Meteor中显示更新的照片裁剪

Question

我有一张带有jquery裁剪器的照片页面。当对裁剪尺寸感到满意时，用户单击按钮并调用方法来裁剪图像。

'update_crop': function(
          fileObj_id, photoSpec
    )
    {

        PhotoCollection.find({"_id" : fileObj_id}).forEach(function (fileObj) {
            console.log("Photo Spec in server: " + photoSpec.x);
            var readStream = fileObj.createReadStream('ImageStore');
            var writeStream = fileObj.createWriteStream('ImageStore');
            gm(readStream, fileObj.name()).crop(photoSpec.width, photoSpec.height, photoSpec.x, photoSpec.y).stream().pipe(writeStream);
        });

    }

我使用图形魔法来裁剪图像并且它有效。但是，要查看裁剪的图像，您必须手动刷新页面，这不是我想要做的。我在照片助手中编写了以下代码，但即使重新订阅发生也不会更改照片。该页面仍需要刷新。

Template.profile_photo.helpers({
    replace_upload_photo: function() {
        return Session.get("replace_upload_photo");
    },
    profile_photo: function() {
                var controller = Iron.controller();
                var id = controller.state.get('profileId');
                var photoHandle = Meteor.subscribe('profile_photo', id);

                if (Session.get("crop")) {
                  console.log
                  photoHandle.stop(); //Deletes the profile photo subscription and re subscribes by using the handler
                  Session.set("crop", false);
                  photoHandle = Meteor.subscribe('profile_photo', id);
                }

                return PhotoCollection.findOne({parentId: id, photoType: "profile"});           
    }
});