我不想删除并重新插入每一行,所以我使用以下内容尝试使用带有anorm的多行:
SQL("""
delete from PERSON_ROLES
WHERE person_id = {userId}
and role_id not in ({rolescommastring})
)
""").on('userId -> userId,
'rolescommastring -> rolescommastring).execute()
上面会产生一个它不喜欢的字符串,我得到:
c.j.b.PreparedStatementHandle - delete from PERSON_ROLES WHERE person_id = 1460 and role_id not in ( '1, 3, 8, 9' )
我可以使用anorm创建动态sql吗?
答案 0 :(得分:4)
自Anorm 2.3以来,支持多值参数。
SQL("""
delete from PERSON_ROLES
WHERE person_id = {userId}
and role_id not in ({rolescommastring})
)
""").on('userId -> userId,
'rolescommastring -> Seq("id1", "id2", "id3")).execute()
https://www.playframework.com/documentation/2.3.x/ScalaAnorm
有更多类似的例子答案 1 :(得分:0)
Anorm并不支持' IN'条款。大多数ORM(如scala-slick)都是一样的,因为预处理语句不支持IN子句
我使用的流程来自https://groups.google.com/forum/#!topic/play-framework/qls6dhhdayc/discussion
基本上这样的事情应该有效
val params = List(1, 3, 8, 9)
val paramsList = for ( i <- 0 until params.size ) yield ("role_id" + i)
SQL("""
delete from PERSON_ROLES
WHERE person_id = {userId}
and role_id not in ({%s})
)
""".format(paramsList.mkString("},{"))).on('userId -> userId ++
paramsList.zip(params)).execute()