Can you explain how to specify individual keys in an object literal in TypeScript?

So I've been working with this data structure

export interface StoreData {
    msdb: {[tableName: string]: List<StoreModel>};
}

However, I'm looking to restrict and enable auto-completion for specific string values in my tableName field. I attempted the following approach but it didn't succeed:

var tableNames:'table_campaigns' | 'table_resources'
export interface StoreData {
    msdb: {[tableName]: List<StoreModel>};
}

I also tried the following without any luck:

interface IMyTables {
    'table_campaigns: string
    'table_resources: string;
}

type MyTables = keyof IMyTables;

export interface StoreData {
    participants: { [key: number]: any };
    threads: { [key: number]: any };
    messages: { [key: number]: any };
    msdb: {MyTables: List<StoreModel>};
}

I attempted something else as well:

type allMyTables = 'table_campaigns' | 'table_resources'

export interface StoreData {
    msdb: {[tableName: allMyTables]: List<StoreModel>};
}




Thanks for taking the time to read,

Sean

Answer №1

Thank you Jeff, your solution worked perfectly:

export interface StoreData {
    participants: { [key: number]: any };
    threads: { [key: number]: any };
    messages: { [key: number]: any };
    msdb: {
        'table_campaigns': List<StoreModel>;
        'table_resources': List<StoreModel>;
    };
}

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