在play-slick中使用sql查詢，其功能類似於包含

Question

我是新來的華而不實，而且問題在困擾着我。 我要查詢一個叫附加表，發現包含在數組b這是正常的斯卡拉陣列中attach_id：

val attaches: TableQuery[AttachTable] = TableQuery[AttachTable] 
val b = Array[Int](1,2,3) 

// This query works well, but I actually need the attach_id that in the array b 
def query = for { 
    a <- attaches if (a.attach_id === 1) 
} yield (a.url) 

// If I replace it like this, it doesn't work, and I don't know why 
def query = for { 
    a <- attaches if (b.contains(a.attach_id)) 
} yield (a.url) 

// This also failed, because b is Array[Int] 
def query = for { 
    a <- attaches if (a.attach_id in b) 
} yield (a.url) 

誰能幫助我嗎？

Answer 1

使用

def query = for{ 
    a<-attaches if a.attach_id inSetBind(b) 
} yield (a.url)