I'm trying to create a TS User class with angular. I declared my attributes as shown in the code below, but I'm getting this error.
An argument for 'id' was not provided.
export class User {
private id: number;
private etabName: string;
constructor(id: number, etabName: string, ) {
this.id = id;
this.etabName = etabName;
}
get _id(): number {
return this. id;
}
set _id(value: number) {
this. id = value;
}
}The issue occurs when you try to instantiate the class without passing arguments, as you did not specify arguments will be optional.
Make arguments optional like this
export class User {
...
constructor(id?: number, etabName?: string, ) {
this.id = id || 0; //Specify default value
this.etabName = etabName || ''; //Specify default value
}
...
}
then you can instantiate class without arguments
const user = new User();//works
You can write it even better with this syntax below, Typescript will take care of creating properties and assigning default values to it.
class User {
constructor(private id: number = 0, private etabName: string = '') {
}
...setters and getters omitted for readability
}
The above typescript will be converted to below javascript
class User {
constructor(id = 0, etabName = '') {
this.id = id;
this.etabName = etabName;
}
...setters and getters omitted for readability
}
Remove the extra space of this. id = value;. Change it to this.id = value;.
I think you need to provide move Information
export class User {
private id: number;
private etabName: string;
constructor(id: number, etabName: string) {
this.id = id;
this.etabName = etabName;
}
get _id(): number {
return this.id;
}
set _id(value: number) {
this.id = value;
}
}
