领域可可:是否可以对链接进行查询 [英] realm cocoa: is it possible to do queries on links

问题描述

在以下对象模型上:

// Dog model
class Dog: RLMObject {
    var name = ""
    var owner = Person()
}

// Person model
class Person: RLMObject {
    name = ""
    birthdate = NSDate(timeIntervalSince1970: 1)
    dogs = RLMArray(objectClassName: Dog.className())
}

是否可以查询所有拥有以'B'开头的狗的人，例如

is it possible to query for all person's who have a dog whose name starts with 'B' i.e. something like

Person.objectsWhere("ANY dogs.name name BEGINSWITH 'B'")

我已经尝试过了，似乎无法在realm-cocoa 0.89.1上使用

I have tried it, doesn't seem to work on realm-cocoa 0.89.1

推荐答案

这应该有效，您在谓词语句中有一个额外的名称，它应如下所示:

This should work, you have an extra name in the predicate statement, it should read like this:

Person.objectsWhere("ANY dogs.name BEGINSWITH 'B'")

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