create nested dto in typeorm - javascript

I've a dto called updateUserDTO and the class looks like this
#IsString()
full_name: string;
#IsNumber()
mobile: string;
#IsEmail()
email: string;
#IsOptional()
location: string;
#IsOptional()
landmark: string;
#IsOptional()
city: string;
How can I create a nested DTO, so when my response I post to my controller looks like this
{
"full_name": "xyz",
"mobile": 1231341451,
"email": "xyz#abc.com",
"address": {
"location": "new avenue",
"landmark": "Opp to St louis",
"city": "Buffalo"
}
}

you can use automapper to do that check the doc here :
https://automapperts.netlify.app/docs/nestjs

Just class-transformer for nested validation.
Divide you JSON into Parts
Do the use of class-transformer to validate a nested object
For Example
import { Type } from 'class-transformer';
import { IsDefined, IsNotEmptyObject, IsOptional, IsString,
ValidateNested } from 'class-validator';
// ################# Second Level Class #################
export class SecondLevel {
#IsOptional()
location: string;
#IsOptional()
landmark: string;
#IsOptional()
city: string;
}
// ############## First Level Class ###############
export class firstLevel {
#IsString()
full_name: string;
#IsNumber()
mobile: string;
#IsEmail()
email: string;
#IsDefined()
#IsNotEmptyObject()
#ValidateNested()
#Type(() => SecondLevel)
address: SecondLevel;
}

Related

Typescrip Mapping One Object to Another

I am having difficulty in mapping one object to another object in Type script especially when objects contain different types and properties
interface PassengerV1 {
firstName: string;
lastName: string;
address: Address;
temp1:strng;
temp2:string;
phoneNumbers: PhoneNumber[];
}
interface PassengerV2 {
firstName: string;
lastName: string;
address: Address;
}
interface ObjectA{
lossCause: string;
lossDate: string;
vehicleInformation: {
vehicle: [
{
passengerInformation: {
passenger: PassengerV1[];};
}
];
};
}
interface ObjectB{
lCause: string;
lDate: string;
vehicleInfo: {
vehicle: [
{
passengerInformation: {
passenger: PassengerV2[];
};
];
};
}
const requestData: ObjectB= {
lCause: ObjectA.lossCause,
lDate: ObjectA.lossDate,
vehicleInformation: vehicleInfo??
}
Above is the ObjectB, iam building from Object A but got stuck with vehicle information. Researched map, objectfromentries but not clear how can be applied with child types differ in properties?

Validate array object - Swagger/NestJS

I am wondering if there's a way to create a dto to validate array of object?
Example array:
[
{
"name": "Tag 1",
"description": "This is the first tag"
},
{
"name": "Tag 2",
"description": "This is the second tag"
}
]
At the moment I have this, while it works, it isn't what I am after.
export class Tags {
#ApiProperty({
description: 'The name of the tag',
example: 'Tag 1',
required: true
})
#IsString()
#MaxLength(30)
#MinLength(1)
name: string;
#ApiProperty({
description: 'The description of the tag',
example: 'This is the first tag',
required: true
})
#IsString()
#MinLength(3)
description: string;
}
export class CreateTagDto {
#ApiProperty({ type: [Tags] })
#Type(() => Tags)
#ArrayMinSize(1)
#ValidateNested({ each: true })
tags: Tags[];
}
Just use ParseArrayPipe:
Update your Controller:
#Post()
createExample(#Body(new ParseArrayPipe({ items: Tags, whitelist: true })) body: Tags[]) {
...
}
Ensure to have items and whitelist set.
Update your DTO:
import { IsString, Length } from "class-validator";
export class Tags {
#IsString()
#Length(1, 30)
name: string;
#IsString()
#Length(3)
description: string;
}

How to properly use spread opeartor in Javascript/Typescript [duplicate]

This question already has answers here:
How can I clone a JavaScript object except for one key?
(25 answers)
Closed 1 year ago.
I have two objects with two different types, I want to use one object to assign another.
interface From {
type: string;
timestamp: number;
aid?: string;
bid?: string;
cid?: string;
did?: string;
eid?: string;
fid?: string;
gid?: string;
}
interface To {
fromSocketID: string;
type: string;
timestamp: number;
aid?: string;
bid?: string;
cid?: string;
did?: string;
eid?: string;
fid?: string;
}
const from: From = {
type: "aaa",
timestamp: 1231231231,
gid: "ddd"
};
// Method1
const to1: To = {
fromSocketID: "temp",
type: from.type,
timestamp: from.timestamp
};
if (from.aid) {
to1.aid = from.aid
}
if (from.bid) {
to1.bid = from.bid;
}
if (from.cid) {
to1.cid = from.cid;
}
// ...three more if statements
// Method2
const to2: To = {
fromSocketID: "temp",
...from
}
// #ts-ignore
delete to2.gid;
interface To has a fromSocketID which From doesn't, and To lacks a gid property. In my real work scenario, I use Method1. I tried Method2, but i had to use ts-ignore. I wonder if there is a better solution.
You can use the rest operator to deconstruct the 'from', ignoring the gid property, like so:
interface From {
type: string;
timestamp: number;
aid?: string;
bid?: string;
cid?: string;
did?: string;
eid?: string;
fid?: string;
gid?: string;
}
interface To {
fromSocketID: string;
type: string;
timestamp: number;
aid?: string;
bid?: string;
cid?: string;
did?: string;
eid?: string;
fid?: string;
}
const from: From = {
type: "aaa",
timestamp: 1231231231,
gid: "ddd"
};
const { gid, ...rest } = from;
const to: To = {
fromSocketID: "temp",
...rest
};

how to define location in an entity using mongodb

I am using nest js in my sample application. I define the entity of my application .Entity means a document. But I struck at one place to define the location.
using mongoose I define the schema of my document like this see link
https://raw.githubusercontent.com/webmakaka/Node.js-API-Masterclass-With-Express-MongoDB/master/api/models/Bootcamp.js
location: {
// GeoJSON Point
type: {
type: String,
enum: ['Point']
},
coordinates: {
type: [Number],
index: '2dsphere'
},
formattedAddress: String,
street: String,
city: String,
state: String,
zipcode: String,
country: String
},
careers: {
// Array of strings
type: [String],
required: true,
enum: [
'Web Development',
'Mobile Development',
'UI/UX',
'Data Science',
'Business',
'Other'
]
},
same thing I want to do using typeorm using mongoDB without mongoos .can you please help me how I will do that.
here is my entity class
import { BaseEntity, Entity, PrimaryGeneratedColumn, Column, ManyToOne, ObjectID, ObjectIdColumn } from 'typeorm';
import { IsNotEmpty, MaxLength } from 'class-validator';
#Entity('bootcamp')
export class BootcampEntity extends BaseEntity {
#ObjectIdColumn() id: ObjectID;
#Column({type:'text',unique:true,length:50,nullable: false})
name:string;
#Column({type:'text'})
slug: string;
#Column({type:'text',length:500,nullable: false})
description: string;
#Column({type:'text'})
website: string;
#Column({type:'text',length:20})
phone: string;
#Column({type:'text',})
email: string;
#Column({type:'text',nullable: false})
address: string;
#Column({type:'text',array: true })
careers: string[];
#Column({type:'int'})
averageRating:number
#Column({type:'int'})
averageCost:number
//
#Column({type:'string',default:'no-photo.jpg'})
photo: string;
//
#Column({type:'boolean',default:false})
housing: boolean;
#Column({type:'boolean',default:false})
jobAssistance: boolean;
#Column({type:'boolean',default:false})
jobGuarantee: boolean;
#Column({type:'boolean',default:false})
acceptGi: boolean;
#Column({type:'date',default:Date.now()})
createdAt: Date;
}
I am using this framework
https://docs.nestjs.com/
typeorm link
https://typeorm.io/#/entities
there is schema
https://raw.githubusercontent.com/webmakaka/Node.js-API-Masterclass-With-Express-MongoDB/master/api/models/Bootcamp.js
I want make same schema using typeorm .I struck only defining the location attribute ?
how to define ?could you please tell me how I will define location in my entity class ?
I think location would have similar structure to code below.
source 1
source 2
enum GeoJSONPoint {
Point = "Point"
}
enum Careers {
WebDevelopment = 'Web Development',
MobileDevelopment = 'Mobile Development',
UIUX = 'UI/UX',
DataScience = 'Data Science',
Business = 'Business',
Other = 'Other'
}
#Entity('location')
export class LocationEntity extends BaseEntity {
#Column({
type: "enum",
enum: GeoJSONPoint
})
type: GeoJSONPoint;
#Column({type:'int'})
coordinates: number;
#Column({type:'text'})
formattedAddress: string;
#Column({type:'text'})
street: string;
#Column({type:'text'})
city: string;
#Column({type:'text'})
state: string;
#Column({type:'text'})
zipcode: string;
#Column({type:'text'})
country: string;
#Column({type:'simple-array'})
careers: Careers[];
}

Typescript Errors in Function Pushing Objects to an Array

I am trying to push new objects to an array in my Angular 2 app, but I am running into an issue (which I suspect may be a Typescript type issue, though I'm not certain). This is what the array I'm pushing to looks like:
locations = [
{ city: 'Los Angelas', postalCode: '90001', coordinates: 2321 },
{ city: 'New York', postalCode: '10001', coordinates: 3432 },
];
And here is the function I am using to push new zipcodes to the array with:
addZipcode(event) {
this.locations.push({ postalCode: this.newPostalCode });
this.newPostalCode = '';
this.addZipInput = false;
event.preventDefault();
}
The error I'm getting re: this function is:
Argument of type '{ postalCode: any; }' is not assignable to parameter
of type '{ city: string; postalCode: string; coordinates: number; }'.
Property 'city' is missing in type '{ postalCode: any; }'.
How can I deal with this issue? Users will be pushing postalCodes, not cities or coordinates. I would think I could push an object of any kind to the array, but it seems typescript is preventing this.
TypeScript has inferred array type as { city: string; postalCode: string; coordinates: number; }[] , but you are trying to push {postalCode:string} - this is error. If you still want to do this then it is necessary to set appropriate type for location:
location:any[]
//or
interface ILocation {
city?:string;
postalCode?:string;
coordinates?:string;
}
location:ILocation[];
You can declare locations as array of objects with optional city and coordinates:
type Loc = {city?: string; postalCode: string; coordinates?: number};
let locations: Loc[] = [
{ city: 'Los Angelas', postalCode: '90001', coordinates: 2321 },
{ city: 'New York', postalCode: '10001', coordinates: 3432 },
];

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