data 对象数组嵌套取不到值问题

<text>{{sons[0].gsons[0]._openid}}</text>取不到值

data如下：

1. sons:Array(1)

1. 0:

1. gsons:Array(1)

1. 0:{_id: "XJ4A2JT75u223hvj", _openid: "o4mgg0XJmnZjCjHOqfHnpjyGxtfk", isSeller: false, phone: "159****3703", pid: "o4mgg0bw14VjeUS_iInjr12hl7sE", …}

2. length:1

3. nv_length:(...)

4. __proto__:Array(0)

2. isSeller:false

3. pid:"o4mgg0XJmnZjCjHOqfHnpjyGxtfk"

4. userInfo:{avatarUrl: "https://wx.qlogo.cn/mmopen/vi_32/z4wepTcrcmEtyABhk…WocBU0eZqKvWKQrwz1T9kMrFxtxxgjbFFLRPKxxN5Oaew/132", city: "Jinhua", country: "China", gender: 1, language: "zh_CN", …}

5. _id:"XKR4nHffS3SWepQL"

6. _openid:"o4mgg0bw14VjeUS_iInjr12hl7sE"