In my project, I use Vue + TypeScript and Axios to get objects from the backend. So, I have an object type like this:
class Annoucement { id!: string; description?: string; deal?: Deal; realty?: Reality; user?: User; }and a response like this:
{"id": "guid","description": "string","deal": { //... },"realty": { //... },"user": { //... }}The main problem is that deal and reality can have different properties, thats why I cant just use something like this
let annoucement = new Annoucement();annoucement.realty.floor = dto.realty.floor;//...EDIT:These are my classes
class Deal { private _id!: string; private _dealInfo!: Sell | Rent; public get id(): string { return this._id; } public set id(value: string) { this._id = value; } public get dealInfo(): Sell | Rent { return this._dealInfo; } public set dealInfo(value: Sell | Rent) { this._dealInfo = value; } public constructor(id: string) { this.id = id; } } class Sell extends Deal { public readonly dealType: string = "Sell"; private _conditions!: SellConditions; public get conditions(): SellConditions { return this._conditions; } public set conditions(value: SellConditions) { this._conditions = value; } public constructor(id: string, conditions: SellConditions) { super(id); this.conditions = conditions; } } class SellConditions { private _id!: string; public get id(): string { return this._id; } public set id(value: string) { this._id = value; } private _price!: number; public get price(): number { return this._price; } public set price(value: number) { this._price = value; } private _type?: string | undefined; public get type(): string | undefined { return this._type; } public set type(value: string | undefined) { this._type = value; } private _yearInOwn!: number; public get yearInOwn(): number { return this._yearInOwn; } public set yearInOwn(value: number) { this._yearInOwn = value; } private _ownersCount!: number; public get ownersCount(): number { return this._ownersCount; } public set ownersCount(value: number) { this._ownersCount = value; } private _prescribersCount!: number; public get prescribersCount(): number { return this._prescribersCount; } public set prescribersCount(value: number) { this._prescribersCount = value; } private _haveChildOwners!: boolean; public get haveChildOwners(): boolean { return this._haveChildOwners; } public set haveChildOwners(value: boolean) { this._haveChildOwners = value; } private _haveChildPrescribers!: boolean; public get haveChildPrescribers(): boolean { return this._haveChildPrescribers; } public set haveChildPrescribers(value: boolean) { this._haveChildPrescribers = value; } } class Rent extends Deal { public readonly dealType: string = "Rell"; private _conditions!: RentConditions; public get conditions(): RentConditions { return this._conditions; } public set conditions(value: RentConditions) { this._conditions = value; } public constructor(id: string, rentConditions: RentConditions) { super(id); this.conditions = rentConditions; } } class RentConditions { private _id!: string; public get id(): string { return this._id; } public set id(value: string) { this._id = value; } private _price!: number; public get price(): number { return this._price; } public set price(value: number) { this._price = value; } private _period?: string | undefined; public get period(): string | undefined { return this._period; } public set period(value: string | undefined) { this._period = value; } private _deposit!: number; public get deposit(): number { return this._deposit; } public set deposit(value: number) { this._deposit = value; } private _communalPays!: number; public get communalPays(): number { return this._communalPays; } public set communalPays(value: number) { this._communalPays = value; } private _prepay!: number; public get prepay(): number { return this._prepay; } public set prepay(value: number) { this._prepay = value; } private _facilities?: string | undefined; public get facilities(): string | undefined { return this._facilities; } public set facilities(value: string | undefined) { this._facilities = value; } private _withKids!: boolean; public get withKids(): boolean { return this._withKids; } public set withKids(value: boolean) { this._withKids = value; } private _withAnimals!: boolean; public get withAnimals(): boolean { return this._withAnimals; } public set withAnimals(value: boolean) { this._withAnimals = value; } private _canSmoke!: boolean; public get canSmoke(): boolean { return this._canSmoke; } public set canSmoke(value: boolean) { this._canSmoke = value; } } class Reality { private _id!: string; public get id(): string { return this._id; } public set id(value: string) { this._id = value; } private _area!: number; public get area(): number { return this._area; } public set area(value: number) { this._area = value; } private _type?: string | undefined; public get type(): string | undefined { return this._type; } public set type(value: string | undefined) { this._type = value; } public constructor(id: string, area: number, type?: string | undefined) { this.id = id; this.area = area; this.type = type; } }class Office extends CommercialBuilding { private _name?: string | undefined; public get name(): string | undefined { return this._name; } public set name(value: string | undefined) { this._name = value; } private _roomsCount!: number; public get roomsCount(): number { return this._roomsCount; } public set roomsCount(value: number) { this._roomsCount = value; }}class CommercialBuilding extends Reality { private _floorsCount!: number; public get floorsCount(): number { return this._floorsCount; } public set floorsCount(value: number) { this._floorsCount = value; } private _entry!: boolean; public get entry(): boolean { return this._entry; } public set entry(value: boolean) { this._entry = value; } private _adress!: string; public get adress(): string { return this._adress; } public set adress(value: string) { this._adress = value; } private _isUse!: boolean; public get isUse(): boolean { return this._isUse; } public set isUse(value: boolean) { this._isUse = value; } private _isAcces!: boolean; public get isAcces(): boolean { return this._isAcces; } public set isAcces(value: boolean) { this._isAcces = value; } private _building?: Building | undefined; public get building(): Building | undefined { return this._building; } public set building(value: Building | undefined) { this._building = value; } class Building { private _id!: string; public get id(): string { return this._id; } public set id(value: string) { this._id = value; } private _class!: string; public get classBuilding(): string { return this._class; } public set classBuilding(value: string) { this._class = value; } private _buildingYear!: number; public get buildingYear(): number { return this._buildingYear; } public set buildingYear(value: number) { this._buildingYear = value; } private _centerName?: string | undefined; public get centerName(): string | undefined { return this._centerName; } public set centerName(value: string | undefined) { this._centerName = value; } private _haveParking!: boolean; public get haveParking(): boolean { return this._haveParking; } public set haveParking(value: boolean) { this._haveParking = value; } private _isEquipment!: boolean; public get isEquipment(): boolean { return this._isEquipment; } public set isEquipment(value: boolean) { this._isEquipment = value; } }Class diagram that demonstrates an inheritance hierarchy
As you can see, when i want to retrieve some announcements from the db, i can get different types of realty. I have no idea which way is the best to map response to an entity.
So I have just two solution of this problem:
- Check responses properties with
ifand define type - Get responses in different functions, where i will know the response structure.
I have tried to find a solution in Google. But in most cases, people ask how to map an entity to a DTO.
