如何使用meteor.js更新嵌套的json数组

Question

我想将这些值插入到mongodb中,这是我的代码,我能够插入它但是当我在admin_section中只更新access_policy时,我无法做到这一点,任何人都可以帮助我,我该如何解决它:meteor.json

{
    "_id" : ObjectId("555ebffa7c88507a4a683e81"),
    "section_id" : "Admin Section",
    "is_active" : true,
    "admin_section" : [
        {
            "_id" : 1,
            "info" : "Setup custom access policy for user groups",
            "sub_section" : "Setup - access policy",
            "access_policy" : "ROOT"
        },
        {
            "_id" : 2,
            "info" : "Customize access policy for main sections",
            "sub_section" : "Manage - access policy",
            "access_policy" : "ROOT"
        },
        {
            "_id" : 3,
            "info" : "Manage user groups for DX-Client application",
            "sub_section" : "Manage - user groups",
            "access_policy" : "ROOT"
        },
        {
            "_id" : 4,
            "info" : "Manage users for DX-Client application",
            "sub_section" : "Create - user",
            "access_policy" : "ADMINISTRATOR"
        },
    ],
    "access_policy" : "ADMINISTRATOR"
     }

meteor.html

  <table class="table table-bordered">
      <tbody>
        {{#each temp_admin_section}}
          {{#if admin_section}}
              <tr class="bgLight">
                    <td class="left" id="one"><b>{{ section_id }}</b></td> 
                    <td class="left" id="two"><b>RESTRICTED</b> - <code contenteditable="true" class="edited"><input value="{{ access_policy }}" /></code><a class="add-access pull-right">add</a></td>
               </tr>
          {{#each admin_section}}
               <tr>
                  <td class="left" id="one">{{ sub_section }}</td> 
                  <td class="left" id="two">RESTRICTED - <code contenteditable="true" class="edited">
                  <input value="{{ access_policy }}" /></code></td>
              </tr>
          {{/each}}
          {{/if}}
        {{/each}}
      </tbody>
  </table>

meteor.js

 'change .edited': function(event, template){
  var to = event.target.value;
  var list = to.split(",");
   map.update(
    {"_id": this._id, "admin_section._id" : 1}, 
    {$set: {"admin_section.$.access_policy": list}}
  );
 }

Answer 1

所有客户端代码都被视为不可信，除非您调用 aMeteor.call并让服务器端方法执行更新。如果您查看控制台，您可能会看到如下错误：

 {
  error: 403, 
  reason: "Not permitted. Untrusted code may only update documents by ID.", 
  details: undefined, message: "Not permitted. Untrusted code may only update documents by ID. [403]", 
  errorType: "Meteor.Error"
}

在客户端，一次只能更新 1 个文档，并且必须通过 ID 选择要更新的文档，因此第一个参数需要是 mongo 文档 ID，而不是 mongo 选择器：

MyCollection.update(
  this._id, 
  {
    $set: { "admin_section.1.access_policy": "TEST" }
  }
) 

另外，要更新数组的子文档，请注意我如何在语句内指定 ID，而不是将第一个参数中的 ID 指定为选择器$set。

如果要更新数组中的所有元素，则必须单独循环遍历所有元素：

var doc = MyCollection.findOne(this._id);
var adminSections = doc.admin_section;

for (i = 0; i < adminSections.length; i++) {
  // If you need to access a value in the nested doc:
  var nestedDoc = adminSections[i];
  MyCollection.update(
    this._id,
    { 
      $set: { "admin_section." + (i+1) + ".access_policy": "someValue" } 
    }
  );
{