Question

api返回的所有模型中都很少有字段。但它们并不是一个单独的对象。他们在其他领域。

两个模型的示例：

活动：

[  
   {  
      "event":{  
         "id":3,
         "company_id":18,
         "archived":false,
         "created_by":229,
         "updated_by":229,
         "owner_id":229,
         "subject":"",
         "start_date":null,
         "end_date":null,
         "name":null,
         "name_class_name":"",
         "related_to":null,
         "related_to_class_name":"",
         "status":"",
         "created_at":"2018-05-07T01:59:38.921-04:00",
         "updated_at":"2018-05-07T01:59:38.921-04:00",
         "custom_nf":false
      }
   }
]

机会：

[  
   {  
      "opportunity":{  
         "id":4,
         "company_id":18,
         "archived":false,
         "created_by":229,
         "updated_by":229,
         "owner_id":229,
         "account_id":null,
         "name":"",
         "lead_source":"",
         "amount":null,
         "close_date":null,
         "probability":null,
         "stage":"",
         "created_at":"2018-05-07T01:49:55.441-04:00",
         "updated_at":"2018-05-07T01:49:55.441-04:00"
      }
   }
]

如图所示，初始字段在两个（所有）模型中都很常见 - id，company_id，archived，created_by 等。
我使用 ObjectMapper 进行了大量项目，但之前没有遇到过这种情况。我完全了解处理嵌套模型，但这是一个不同的情况虽然我可以通过重复所有模型中的所有常见字段来轻松处理此问题。 但这听起来不太好。 我正在寻找一种方法，我可以创建一个包含所有常见字段的单独模型类。但问题是 - 如何使用ObjectMapper将其与api响应进行映射？

举个例子，这就是我创建机会模型的方式：

import UIKit
import ObjectMapper

class Opportunity: NSObject, Mappable {

    var id: Int?
    var companyId: Int?
    var archived: Int?
    var createdBy: Int?
    var updatedBy: Int?
    var ownerId: Int?
    var accountId: Int?
    var name: String?
    var leadSource: String?
    var amount: String?
    var closeDate: String?
    var probability: String?
    var stage: String?
    var createdAt: String?
    var updatedAt: String?

    required init?(map: Map) {

    }

     func mapping(map: Map) {
        self.id <- map["id"]
        self.companyId <- map["company_id"]
        self.archived <- map["archived"]
        self.createdBy <- map["created_by"]
        self.updatedBy <- map["updated_by"]
        self.ownerId <- map["owner_id"]
        self.accountId <- map["account_id"]
        self.name <- map["name"]
        self.leadSource <- map["lead_source"]
        self.amount <- map["amount"]
        self.closeDate <- map["close_date"]
        self.probability <- map["probability"]
        self.stage <- map["stage"]
        self.createdAt <- map["created_at"]
        self.updatedAt <- map["updated_at"]
    }
}

Answer 1

您可以创建基本实体并放置公共字段。

示例：

import UIKit import ObjectMapper class BaseEntity: NSObject, Mappable { var id: Int? var companyId: Int? var archived: Int? var createdBy: Int? var updatedBy: Int? var ownerId: Int? var name: String? var createdAt: String? var updatedAt: String? required init?(map: Map) { } func mapping(map: Map) { self.id <- map["id"] self.companyId <- map["company_id"] self.archived <- map["archived"] self.createdBy <- map["created_by"] self.updatedBy <- map["updated_by"] self.ownerId <- map["owner_id"] self.name <- map["name"] self.createdAt <- map["created_at"] self.updatedAt <- map["updated_at"] } } class Opportunity: BaseEntity { var accountId: Int? var leadSource: String? var amount: String? var closeDate: String? var probability: String? var stage: String? required init?(map: Map) { super.init(map: map) } override func mapping(map: Map) { super.mapping(map: map) self.accountId <- map["account_id"] self.leadSource <- map["lead_source"] self.amount <- map["amount"] self.closeDate <- map["close_date"] self.probability <- map["probability"] self.stage <- map["stage"] } }

注意： BaseEntity不是一个好名字，我想你可以给出更好的名字。

Alamofire ObjectMapper - 从所有模型中提取公共字段并映射它们

1 个答案: