Argument of type 'User' is not assignable to parameter of type 'string'

Question

I have created an interface of User to put in some value from ngModel. Take a look at this.

user.ts

export class User{
    _id: String;
    username: String;
    password: String;
    firstname: String;
    lastname: String;
    gender: String;
    address: String;
    contact: Number;
    email?: String;
}

Example of ngModel binding

<input type="text" [(ngModel)]="user.username" class="form-control" name="username" id="username" placeholder="Enter your Username" formControlName="username"/>

Output from the console log

I want to make the result to a json. I use JSON.parse but the error on the title pops up. How can I convert it to a json object? Thanks

Jason W · Accepted Answer · 2016-12-17 03:21:15Z

5

JSON.parse is meant for creating a javascript object from a string (that is already formatted for JSON). What you're looking for is JSON.stringify instead to convert your javascript object into JSON text.

answered Dec 17, 2016 at 3:21

Jason W

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6 Comments

Mix Austria Over a year ago

i think this is a dumb question but do you consider the User to be a JSON object?

Oden Over a year ago

@MixAustria there's no such thing as a "JSON object" in JavaScript. Your user type is simply an object, and any JavaScript object can be turned into a JSON string.

Jason W Over a year ago

User is a javascript object in this case. JSON is "Javascript Object Notation", which is a text-based format to represent objects in javascript (many great definitions out there to learn more about the difference)

Jason W Over a year ago

JSON text would be a string in Javascript that represents the User object, such as "{ _id:'1', username:'abc' /**... and so on ...**/ }"

Mix Austria Over a year ago

now I pass this object to an express server and here is what I got on the request body. kindly see this please prntscr.com/dkfgwy There are \n on the object and I cannot access it for example req.body.username etc. can you tell my why?

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