如何临时禁用反应性并仅更新/检索本地mongodb? [英] How to disable reactivity temporarily and just update/retrieve local mongodb?

问题描述

考虑此要求.

在发布新帖子时，在编辑的同时，会有一个预览面板，该面板将在您键入内容时呈现您的帖子内容.

Before you publishing a new post, while editing, there is a preview panel which will render your post contents as you typing.

因为它不是真实的帖子，所以我们只希望它仅更新本地mongodb(并从中检索内容)，并且不希望此帖子将被同步到服务器. 如何实现呢?

Because it is not a real post, we just want it will only update ( and retrieve content from) local mongodb and do not want this post will be synced to server. How to implement that?

我在模板中尝试过

Template.newPost.events
  'keyup .post-content' : (event, templ)->
    event.preventDefault()
    Deps.nonreactive ->
      Post.update({_id: post_id}, {content: event.currentTarget.value })

还有这个

Template.newPost.events
  'keyup .post-content' : (event, templ)->
    event.preventDefault()
    Meteor.call 'updatePostContent', post_id, event.currentTarget.value


Meteor.methods
  updatePostContent: (postId, value)->
    if (this.isSimulation)
      Post.update({_id: postId}, {content: value })
    else
      this.stop()

以上所有内容均无效.

对不起，我的英语不好.

Sorry for my poor english.

推荐答案

它将在您的助手中.

您可以像平常一样插入文档.但是在查看时，您可以打开和关闭反应性.

You insert the document like normal. But when viewing it you can switch reactivity on and off.

Template.newPost.helpers({
    yourpost:function() {
        return YourPosts.find({},{reactive: false});
    }
});

您可以在find或findOne查询中忽略reactive: false作为选项.您可以使用Session之类的东西来获取其真值或假值，然后在需要时进行更改.

You pass off reactive: false as an option in your find or findOne query. You could use something like a Session to get its true or false value then change it when you need to.

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