Ember Data嵌套模型

时间:2013-10-08 09:31:55

标签: ember.js ember-data

我在使用NDB的Google App Engine项目中使用EmberJs和Ember-Data。在数据库中,我有Host,Probe和Check实体。只要我的REST api按顺序排列,数据库模型并不重要,但为了清楚起见,这里是我的数据库类:

class Host(ndb.Model):
    hostName = ndb.StringProperty()

hostKey = ndb.Key('Host', 'SomeHostId')

class Probe(ndb.Model):
    checkName = ndb.StringProperty()

probeKey = ndb.Key('Host', 'SomeHostId', 'Probe', 'SomeProbeId')

class Check(ndb.Model):
    checkName = ndb.StringProperty()

checkKey = ndb.Key('Host', 'SomeHostId', 'Probe', 'SomeProbeId', 'Check', 'SomeCheckId')

我已经添加了密钥,以显示每个主机上都运行了一些探针,每个探针都会执行一些检查。

  • 主机
    • 探针
      • 检查

在我的App.Js中,我定义了以下模型:

App.Host = DS.Model.extend({
    hostName: DS.attr('string')
    probes: DS.hasMany('probe',{async:true})
});

App.Probe = DS.Model.extend({
    host: DS.belongsTo('host'),
    probeName: DS.attr('string')
    checks: DS.hasMany('check',{async:true})
});

App.Check = DS.Model.extend({
    probe: DS.belongsTo('probe'),
    hostName: DS.attr('string')
});

我已经定义了以下路由器:

App.Router.map(function() {
    this.resource('hosts', function(){
        this.resource('host', { path:':host_id'}, function(){
            this.resource('probes', function(){
                this.resource('probe', { path:':probe_id'}, function(){
                    this.resource('checks', function(){
                        this.resource('check', { path:':check_id'}, function(){

                        });
                    });
                });
            });
        });
    });
});

在AppEngine中,如果已构建以下URL路径:

app = webapp2.WSGIApplication([
    ('/', MainHandler),
    webapp2.Route('/hosts', HostsHandler),
    webapp2.Route('/hosts/<hostId>/', HostHandler),
    webapp2.Route('/hosts/<hostId>/probes', ProbesHandler),
    webapp2.Route('/hosts/<hostId>/probes/<probeId>/checks', ChecksHandler),
    webapp2.Route('/hosts/<hostId>/probes/<probeId>/checks/<checkId>/', CheckHandler)
])

http://example.com/hosts返回:

{
    "hosts": [
        {
            "hostName": "SomeHostName1",
            "id": "SomeHostId1"
        },
        {
            "hostName": "SomeHostName2",
            "id": "SomeHostId2"
        }
    ]
}

http://example.com/hosts/SomeHostId1/probes返回:

{
    "probes": [
        {
            "probeName": "SomeProbeName1",
            "id": "SomeProbeId1",
            "host_id": "SomeHostId1"
        },
        {
            "probeName": "SomeProbeName2",
            "id": "SomeProbeId2",
            "host_id": "SomeHostId1"
        }
    ]
}

http://example.com/hosts/SomeHostId1/probes/SomeProbeId1/checks返回:

{
    "checks": [
        {
            "checkName": "SomeCheckName1",
            "id": "SomeCheckId1",
            "probe_id": "SomeProbeId1"
        },
        {
            "checkName": "SomeCheckName2",
            "id": "SomeCheckId2",
            "probe_id": "SomeProbeId1"
        }
    ]
}

我的模板是:

<script type="text/x-handlebars" id="host">
  <h3>{{hostName}}</h3>
  {{#link-to 'probes' probes}}probes{{/link-to}}

  {{outlet}}
</script>

<script type="text/x-handlebars" id="probes">
  {{#each probe in probes}}
    Probe: {{probe.probeName}}
    {{#link-to 'checks' probe.checks}}checks{{/link-to}}
  {{/each}}

  {{outlet}}
</script>

<script type="text/x-handlebars" id="checks">
  {{#each check in checks}}
    Check: {{check.checkName}}
  {{/each}}
</script>

现在我已经拥有了所有这些...但不知道如何将它组合在一起以便Ember-Data提供正确的http请求。到目前为止,我只看到请求转到http://example.com/modelName/

3 个答案:

答案 0 :(得分:3)

目前,Ember Data不支持API端点的此类嵌套路由。有一些关于此的讨论,但它似乎没有取得任何进展。

答案 1 :(得分:3)

我对App引擎一无所知,但是如果你能获得这样的配置,那么for ember-data rest adapter

app = webapp2.WSGIApplication([
    ('/', MainHandler),
    webapp2.Route('/hosts', HostsHandler),
    webapp2.Route('/hosts/<hostId>', HostHandler),
    webapp2.Route('/probes', ProbesHandler),
    webapp2.Route('/probes/<probeId>', ProbesHandler),
    webapp2.Route('/checks/', CheckHandler)
    webapp2.Route('/checks/<checkId>/', CheckHandler)
])

http://example.com/hosts的响应应该返回一个json数组主机:[{},{}]和http://example.com/hosts/1表示主机对象主机的json:{}和其他AppEngine相同路由

答案 2 :(得分:2)

您已经定义了两次主机模型,我认为应该不是这种情况。我是ember的新手,并没有使用async:true功能,但我能够做的事情(但我没有使用嵌套路由):

App.Host = DS.Model.extend({
    hostName: DS.attr('string')
    probes: DS.hasMany('probe')
});

App.Probe = DS.Model.extend({
    probeName: DS.attr('string')
    checks: DS.hasMany('check')
});

App.Check = DS.Model.extend({
    checkName: DS.attr('string')
});

你可以为返回的主机启动一个rest api:

{
    "hosts": [
        {
            "hostName": "SomeHostName1",
            "id": "SomeHostId1",
            "probes":["p1","p2"]
        },
        {
            "hostName": "SomeHostName2",
            "id": "SomeHostId2",
            "probes":["p2","p3"]
        }
    ],
    "probes": [
        {
            "probeName": "SomeProbeName1",
            "id": "p1",
            "checks":["c1","c2"]
        },
        {
            "probeName": "SomeProbeName2",
            "id": "p2",
            "checks":["c2","c3"]
        }
    ],
    "checks": [
        {
            "checkName": "SomeCheckName1",
            "id": "c1"
        },
        {
            "checkName": "SomeCheckName2",
            "id": "c2"
        }
    ]
} 

在我的情况下,我没有嵌套路由,但我认为我们应该能够以某种方式从主有效负载设置控制器内容,因为所有必需的内容已经存储!我不知道它是否有任何帮助,但这也是我想知道的答案。