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

Question

api 返回的所有模型中共有几个字段。但它们不是作为单独的对象出现的。它们存在于其他领域中。

两个模型的示例：

事件：

[  
   {  
      "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 等等。
我曾与 ObjectMapper 合作过很多项目，但之前没有遇到过。我完全了解处理嵌套模型，但这是不同的情况。
尽管我可以通过在所有模型中重复所有公共字段来轻松处理这个问题。 但这听起来不太好。
我正在寻找的是一种可以创建包含所有公共字段的单独模型 class 的方法。但问题是 - 我如何使用 ObjectMapper 将其映射到 api 响应？

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

您可以创建基础实体并将公共字段放在那里。

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： BaseEntity不是好名字，我觉得你可以起个更好的名字。

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

Alamofire ObjectMapper - Extract common fields from all models and map them

json

ios

swift

alamofire

objectmapper