export enum RoleTypesEnum {
RoleA = 'Role is A',
RoleB = 'Role is B',
}
// in TypeScript file
public RoleTypesEnum = RoleTypesEnum;
I am trying to obtain the string value (e.g. Role is B) from an enum using an integer.
If I use the following code in my HTML or TypeScript file:
console.log(RoleTypesEnum[0])
it returns undefined.
This issue arises because I receive integers from the backend (e.g., through JSON -> RoleTypes: 0 or 1).
While I can create a pipe to fetch enum values using Object.values(RoleTypesEnum);, I'm curious about best practices. The pipe solution can be found here: Angular Pipe extracts from Enum values, but generic for any Enum
Ensuring Backend-Frontend Synchronicity
The database stores enums as integers. In the backend (ASP.NET), DTOs and models have fields with enum types. Upon returning from the Controller, it automatically converts the enum into an integer in the JSON response.
- If I were to return the string value from the backend (json: "roleB") instead of the integer (json: 1), I would need to convert the enum into a string before sending the JSON, which might complicate the DB and backend design.
- In the case of returning an integer from the backend (as seen in the current scenario), custom string values cannot be utilized. For instance, retrieving 'RoleTypesEnum[1]' results in undefined. Unless I reset the enum to work solely with integers
export enum RoleTypesEnum {
RoleA = 0,
RoleB = 1,
}
However, this approach eliminates the possibility of using custom string values (e.g. "Role is B").