我正在使用typeorm从DB获取数据,我想列出所有问题以及每个问题的最新状态。
我的数据库有2个表:Issues和IssueStatus进入IssueStatus我将保存每个状态更改以及有关如何解决Issue的注释。
我的代码:
var issues = await issuesRepository
.createQueryBuilder('issue')
.select(['issue', 'history.status'])
.innerJoin('issue.history', 'history')
.leftJoin(
'issue.history',
'history2',
'history.date < history2.date OR (history.date = history2.date AND history.id < history2.id)'
)
.where('history2.id IS NULL')
.getMany();
我得到这个结果:
{
"id": "5ff86c81-a202-4211-84f4-afe2d5c0fc0d",
"cod": 1,
"opendate": "2020-12-08T13:18:55.683Z",
"closedate": null,
"type": "systems",
"subtype": "avance",
"description": "first test",
"mailto": "[email protected]",
"hostname": "dskcwbti02",
"username": "glenn.veloso",
"solution": null,
"supportby": null,
"history": [
{
"status": 0
}
]
}
但是我想要这个:
{
"id": "5ff86c81-a202-4211-84f4-afe2d5c0fc0d",
"cod": 1,
"opendate": "2020-12-08T13:18:55.683Z",
"closedate": null,
"type": "systems",
"subtype": "avance",
"description": "first test",
"mailto": "[email protected]",
"hostname": "dskcwbti02",
"username": "glenn.veloso",
"solution": null,
"supportby": null,
"status": 0
}
您可以像下面这样进行创建,但是您需要使用别名覆盖所有必填字段select
:
var issues = await issuesRepository
.createQueryBuilder('issue')
.select(['issue', 'history.status AS status']) // <- changes here
.innerJoin('issue.history', 'history')
.leftJoin(
'issue.history',
'history2',
'history.date < history2.date OR (history.date = history2.date AND history.id < history2.id)'
)
.where('history2.id IS NULL')
.getRawMany(); // <- changes here
我的意思是
您将需要使用中的别名覆盖所有必填字段
select
.select([
'issue.id AS id',
'issue.cod AS cod',
'issue.opendate AS opendate',
...
...
...
'issue.solution AS solution',
'issue.supportby AS supportby',
'history.status AS status'
])
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