CoreStore分段列表监视器如何在运行时指定.where子句

import CoreStore

// 假设有一个实体叫做 'Person'，具有 'name' 和 'age' 属性
struct Person: CoreStoreEntity {
    var name: String?
    var age: Int16?
}

// 创建一个数据栈
let dataStack = DataStack(xcodeModelName: "YourModelName")

// 运行时构建查询
func fetchPersons(nameFilter: String?, ageFilter: Int?) {
    let persons = dataStack.fetch(
        from: Person.entity(),
        where: {
            if let name = nameFilter {
                $0.where(\.$name == name)
            }
            if let age = ageFilter {
                $0.where(\.$age == age)
            }
        }
    )
    
    // 处理结果
    for person in persons {
        print("Name: \(person.name ?? ""), Age: \(person.age ?? 0)")
    }
}

// 调用函数并传入运行时参数
fetchPersons(nameFilter: "John", ageFilter: 30)