}, { "id": 8, "created_at": "2023-05-31T04:01:11.000Z", "updated_at": "2023-05-31T04:01:11.000Z", "gatewayMac": "e491127eaa15", "deviceId": "710co", "pointId": "710co1", "pointName": "710一氧化碳1", "value": "0" }, { "id": 9, "created_at": "2023-05-31T04:10:34.000Z", "updated_at": "2023-05-31T04:10:34.000Z", "gatewayMac": "e491127eaa15", "deviceId": "710no2", "pointId": "710no2", "pointName": "710二氧化氮", "value": "4" }, { "id": 10, "created_at": "2023-05-31T04:11:36.000Z", "updated_at": "2023-05-31T04:11:36.000Z", "gatewayMac": "e491127eaa15", "deviceId": "710co2", "pointId": "710co2", "pointName": "710一样化碳2", "value": "0" }, { "id": 11, "created_at": "2023-05-31T04:12:08.000Z", "updated_at": "2023-05-31T05:19:39.000Z", "gatewayMac": "e491127eaa15", "deviceId": "710o22", "pointId": "710o22", "pointName": "710氧气2", "value": "205" }, {
时间: 2023-08-31 09:08:40 浏览: 39
I'm sorry, but your question is incomplete. It looks like you copied and pasted some code related to device readings from a database. Can you please provide a complete question or clarify what you would like me to help you with?
相关问题
"created_at": "2023-06-01T13:19:42.903" python改成yyyy-mm-dd HH:MM:SS
可以使用Python中的datetime库来实现时间格式的转换。具体代码如下:
```python
from datetime import datetime
created_at = "2023-06-01T13:19:42.903"
dt = datetime.strptime(created_at, "%Y-%m-%dT%H:%M:%S.%f")
new_format = dt.strftime("%Y-%m-%d %H:%M:%S")
print(new_format)
```
输出结果为:`2023-06-01 13:19:42`,即将原始时间字符串转换为了指定格式的时间字符串。
<ActiveRecord::Relation [#<UserPromission id: 651, user_id: 35, bp_id: 18, created_at: "2023-06-06 09:11:59", updated_at: "2023-06-06 09:11:59", data_power: 1>]> 怎么取id
你可以使用以下方式来获取 `id`:
```ruby
user_promission = UserPromission.first # 获取第一个 UserPromission 对象
id = user_promission.id # 获取 id 属性
```
或者你也可以直接在查询中选择只返回 `id` 列,例如:
```ruby
user_promission_ids = UserPromission.select(:id)
```
这样查询结果就只包含 `id` 列的值了。
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