The issue of a property name not existing on a type in Typescript and Angular2

The answer provided for this particular question using the find method is not functioning in TypeScript, resulting in a compilation error. After reviewing similar inquiries, it appears that each one has its own unique context.

Below is the array being referenced:

categories: Category[] = [];

Here is the Category object structure:

export class Category{
  constructor(
    id: string,
    name: string,
    category_types: Object[]
  ) {}
}

In an attempt to search for a specific value (such as 'Wood'), I am using the following syntax:

let a = this.categories.find(v => v.name === value);

The error received states "Property name does not exist on type 'Category'."

Answer №1

The reason for this is due to your class Category lacking any properties. You can utilize parameter properties to directly create properties from constructor parameters:

export class Category{
  constructor(
    public id: string,
    public name: string,
    public category_types: Object[]
  ) {}
}

By implementing parameter properties in this way, all the parameters of the Category class become its public properties as well.

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