humans.json
{
"_id": "22YAE7bEXdST9MyrZ",
"createdAt": {
"$date": "2016-11-22T15:09:25.968Z"
},
"abilities": {
"power": {
"mana":78,
"chakra":0
"energy":60
}
},
"emails": [
{
"address": "Rob6@rob.com",
"working": false
}
],
"roles": [
"killing":true
]
}
所以我只想获取第一个字符为大写的emails.address
。
答案 0 :(得分:0)
使用可以像javascript一样使用正则表达式:
None
如果阵列中有许多电子邮件,但只想返回匹配的电子邮件(以大写字母开头),则可以使用其他投影:
2018-07-27 09:03:41,189 INFO sqlalchemy.engine.base.Engine INSERT INTO emp_man_history (emp_id, man_id_from, man_id_to, "when") VALUES (?, ?, ?, ?)
2018-07-27 09:03:41,189 INFO sqlalchemy.engine.base.Engine ('2', None, '1', '2018-07-27 09:03:41.188906')