Guide on converting general objects into a TypeScript class

Having recently started working with Typescript, I have a JSON object that needs to be mapped to a generic interface. However, my initial attempt at creating the interface seems to be incorrect. I need assistance in constructing a generic interface or class that can properly handle the mapping of the JSON object below.

JSON Object

"parentValue": {
            "childValue1": {
                "resource": "childValue1",
                "application": "childValue1",
                "permissions": [
                    "READ"
                ],
                "attributeConstraints": {},
                "attributeConstraintsCount": 0
            },"childValue2": {
                "resource": "childValue2",
                "application": "childValue2",
                "permissions": [
                    "READ"
                ],
                "attributeConstraints": {},
                "attributeConstraintsCount": 0
            },
            "childValue3": {
                "resource": "childValue3",
                "application": "childValue3",
                "permissions": [
                    "READ"
                ],
                "attributeConstraints": {},
                "attributeConstraintsCount": 0
            }

}

Typescript Interface

interface ParentValue{
   childValue: ChildValue<T>
}

export interface ChildValue<T>{
  childDetails: ChildDetails
}

export ChildDetails{
 resource: string;
  application: string;
  permissions: string[];
  attributeConstraints: AttributeConstraints;
  attributeConstraintsCount: number;
}

Answer №1

Your situation is unique and requires a specific approach. Consider implementing the following structure:

export ChildDetails {
  resource: string;
  application: string;
  permissions: string[];
  attributeConstraints: AttributeConstraints;
  attributeConstraintsCount: number;
}

interface ParentValue {
  childValue1: ChildDetails,
  childValue2: ChildDetails,
  childValue3: ChildDetails,
}

If you find yourself with an unknown number of childValueX, consider using the following pattern:

interface ParentValue { 
  [key: string]: ChildDetails 
}

Keep in mind that it's challenging to define the structure without specifying the keys explicitly.

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