Swift 核心数据-通过属性获取和筛选一对多关系

我的数据模型

一个客户可以有多个评估，但一个评估只能有一个客户作为反向关系。我的目标是获取客户拥有的所有评估，并根据初始客户的“firstName”属性进行筛选

我的过滤功能：

  func filterData(){

let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
let words = textInSearchField.components(separatedBy: " ")

for word in words{

  if (word).count == 0{
    continue
  }

  let firstNamePredicate = NSPredicate(format: "firstName contains[c] %@", word)
  let lastNamePredicate = NSPredicate(format: "lastName contains[c] %@", word)
  let idPredicate = NSPredicate(format: "id contains[c] %@", word)

  // I am using a Compound Predicate so that I can filter by first name, last name but also the id property.
  let orPredicate = NSCompoundPredicate(type: NSCompoundPredicate.LogicalType.or, subpredicates: [firstNamePredicate, lastNamePredicate, idPredicate])

  clientsEntity.predicate = orPredicate

  // results is an array of type [NSManagedObject], I am using the compound predicate I created above to fetch specific clients. 
  results = try! context.fetch(clientsEntity) as! [NSManagedObject]

 }
}

我基本上是想通过名字、姓氏或ID获得客户的所有评估。NSPredicate是最好的方法吗

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谢谢。

使用此选项，您可以从核心数据中获取所有筛选数据。取下客户机，并通过获得评估结果。