Question

我有关于关系和autoform的collection2的问题。我尝试实现1：n关系，其中每个对象只有1个objectType，而对于每个objectType，可以引用多个对象。

我的架构如下所示：

// register collections
Objects = new Mongo.Collection('objects');
ObjectTypes = new Mongo.Collection('objectTypes');

// define schema
var Schemas = {};

Schemas.ObjectType = new SimpleSchema({ // object type schema
    name: {
      type: String
    }
});

Schemas.Object = new SimpleSchema({ // object schema
    type: {
        type: ObjectTypes.Schema,
        optional: true
    },
    title: {
        type: String
    }
});

// attach schemas
ObjectTypes.attachSchema(Schemas.ObjectType);
Objects.attachSchema(Schemas.Object);

我的autoform看起来像这样：

{{> quickForm collection="Objects" id="insertTestForm" type="insert"}}

我实际上希望我的type属性有一个select选项字段，但会出现一个文本输入。谁知道为什么？

根据文档[1]，它应该是一个选择选项字段：

If you use a field that has a type that is a Mongo.Collection instance, autoform will automatically provide select options based on _id and name fields from the related Mongo.Collection. You may override with your own options to use a field other than name or to show a limited subset of all documents. You can also use allowedValues to limit which _ids should be shown in the options list.

[1] https://github.com/aldeed/meteor-collection2/blob/master/RELATIONSHIPS.md#user-content-autoform

修改如果我使用

type: ObjectTypes,

而不是

type: ObjectTypes.Schema,

我的应用崩溃，引发以下错误：

Your app is crashing. Here's the latest log.

/Users/XXX/.meteor/packages/meteor-tool/.1.1.3.ik16id++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle/server-lib/node_modules/fibers/future.js:245
                        throw(ex);
                              ^
RangeError: Maximum call stack size exceeded
Exited with code: 8
Your application is crashing. Waiting for file change.

Answer 1

您的类型不是＆＃34; Mongo.Collection实例＆＃34;就像文件说的那样;它是一个架构。试试这个：

Schemas.Object = new SimpleSchema({
    type: {
        type: ObjectTypes,
        optional: true
    },
    ...

Answer 2

由于没有人能帮助我解决这一事件，我提出了另一种解决方案：

a uid search uid 1:2

正如您所见，我将// register collections Objects = new Mongo.Collection('objects'); ObjectTypes = new Mongo.Collection('objectTypes'); // define schema var Schemas = {}; Schemas.Object = new SimpleSchema({ // object schema type: { type: String, optional: true, autoform: { return ObjectTypes.find().map(function(c) { return{label: c.name, value: c._id} }); } }, // ... }); // attach schema Objects.attachSchema(Schemas.Object);集合中需要的属性手动映射到objectTypes属性。由于它返回一个包含autoform和label属性的对象数组，因此autoform将自动呈现一个select选项。

autoform不会渲染选择选项字段

2 个答案: