swift - Swift 中等效的 SQL IN 子句

Question

我想知道MySQL的IN子句的Core Data/Swift中是否有等价的命令:

“SELECT details FROM tbl_details WHERE ticket IN (1,2,3)

Answer 1

这应该有效:

let list = [1, 2, 3]
let inPred = NSPredicate(format: "ticket IN %@", list)
var request = NSFetchRequest(entityName: "details")
request.returnsObjectsAsFaults = false
request.predicate = inPred

之后，以通常的方式调用context.executeFetchRequest 来获取结果。