如何在knex/mysql中获取所有更新记录的列表 [英] How to get a list of all updated records in knex / mysql
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问题描述
这是我正在处理的查询:
Here's the query I'm working on:
return knex('table')
.returning('id')
.where('boolean', false)
.andWhere('fooID', foo.id)
.update({
boolean : true
})
.limit(num)
.then(function(ids) {
console.log('\nids');
console.log(ids); //outputs num
ids
现在包含3,即受影响的行数.有什么方法可以获取那3行的ID?我印象中.returning()
做到了,但似乎没有.
ids
now contains 3, which is the number of affected rows. Is there any way to get the ids of those 3 rows? I was under the impression .returning()
did that, but it appears to not.
推荐答案
Mysql数据库不支持returning
语句,它仅返回更新行的计数
Mysql database doesn't support returning
statement and it returns just count of updated rows http://dev.mysql.com/doc/refman/5.7/en/update.html.
在您看来,您必须先查询要更新的行的ID,然后在事务内进行更新并获取它们.
In your case looks like you must first query ids of the rows to be updated and then update and fetch them inside a transaction.
赞:
return knex.transaction(trx => {
return trx('table')
.select('id')
.where('boolean', false)
.andWhere('fooID', foo.id)
.limit(num)
.then(ids => {
return trx('table').update({ boolean: true })
.whereIn('id', ids)
.then(() => {
return trx('table').whereIn('id', ids);
});
});
});
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