如何在 emberfire/emder-data 中指定异步belongsTo/hasMany关系?

问题描述

我是 Ember/ED/EmberFire 的新手，如果这是一个微不足道的问题，我深表歉意.我可以将记录保存到 Firebase，但无法在控制器中指定与这些记录的关系.我正在使用

I am very new at Ember/ED/EmberFire so apologies if this is a trivial question. I am able to save records to Firebase but I am unable to specify relationships to those records in my controller. I am using

DEBUG: Ember      : 1.10.0
DEBUG: Ember Data : 1.0.0-beta.12
DEBUG: Firebase   : 2.2.3
DEBUG: EmberFire  : 1.4.3
DEBUG: jQuery     : 1.11.2

我有一个这样的模型:

var Patient = DS.Model.extend({
    lastName: DS.attr('string'),
    firstName: DS.attr('string'),
    encounters: DS.hasMany('encounter', {async: true})
});

var Encounter = DS.Model.extend({
    dateOfEncounter: DS.attr('string'),
    patient: DS.belongsTo('patient', {async: true})
});

我只是想指定与我新创建的 encounter 对象相关联的 patient.这是我的控制器:

I am simply trying to specify the patient that my newly created encounter object is associated with. This is my controller:

actions: {
        registerEncounter: function() {
            var newEncounter = this.store.createRecord('encounter', {
            dateOfEncounter: this.get('dateOfEncounter'),
            patient: this.store.find('patient', '-Jl8u8Tph_w4PMAXb9H_')
            });

        newEncounter.save();

        this.setProperties({
            dateOfEncounter: ''
        });
    }
}

我可以在 Firebase 中成功创建 encounter 记录，但是没有关联的 patient 属性.我得到的只是

I can successfully create the encounter record in Firebase, but there is no associated patient property. All I get is

https://github.com/firebase/emberfire/issues/232

推荐答案

this.store.find('patient', '-Jl8u8Tph_w4PMAXb9H_') 返回一个 promise.

this.store.find('patient', '-Jl8u8Tph_w4PMAXb9H_') returns a promise.

试试这个:

this.store.find('patient', '-Jl8u8Tph_w4PMAXb9H_').then(function(pat) {
     var newEncounter = this.store.createRecord('encounter', {
        dateOfEncounter: this.get('dateOfEncounter'),
        patient: pat
     });

     newEncounter.save();
});

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