Handling Either Left Error in Effect Typescript
hi everyone,
why my usage of Either stops the code from executing, I am trying to retrieve a key that currently doesn't exist and I want to return
why my usage of Either stops the code from executing, I am trying to retrieve a key that currently doesn't exist and I want to return
Either.leftEither.left and then handle it, but I get an Uncaught ErrorUncaught Errorconst getManifestId = Effect.gen(function* () {
const { region, Name } = yield* SSMClientConfigContext;
const ssmClient = new SSMClient({ region });
const command = new GetParameterCommand({
Name,
WithDecryption: false,
});
const manifestId$ = yield* Effect.tryPromise({
try: async () => {
return Either.right((await ssmClient.send(command)).Parameter?.Value);
},
catch: (e) => Either.left(e),
});
return manifestId$;
});const getManifestId = Effect.gen(function* () {
const { region, Name } = yield* SSMClientConfigContext;
const ssmClient = new SSMClient({ region });
const command = new GetParameterCommand({
Name,
WithDecryption: false,
});
const manifestId$ = yield* Effect.tryPromise({
try: async () => {
return Either.right((await ssmClient.send(command)).Parameter?.Value);
},
catch: (e) => Either.left(e),
});
return manifestId$;
});const program = Effect.gen(function* () {
const manifestId$ = yield* getManifestId;
Either.mapBoth(
manifestId$,
{
onRight: (manifestId) =>
downloadVpkDir(manifest).pipe(
Effect.unless(() => manifestId == latestManifestId),
),
onLeft: (_) => downloadVpkDir(manifest),
},
);
})const program = Effect.gen(function* () {
const manifestId$ = yield* getManifestId;
Either.mapBoth(
manifestId$,
{
onRight: (manifestId) =>
downloadVpkDir(manifest).pipe(
Effect.unless(() => manifestId == latestManifestId),
),
onLeft: (_) => downloadVpkDir(manifest),
},
);
})error: Uncaught (in promise) (FiberFailure) Error: {
"_id": "Either",
"_tag": "Left",
"left": {
"name": "ParameterNotFound",
"$fault": "client",
"$metadata": {
"httpStatusCode": 400,
"requestId": "d28f8884-59ad-4694-b9cc-62ce28e3146c",
"attempts": 1,
"totalRetryDelay": 0
},
"__type": "ParameterNotFound",
"message": "UnknownError"
}
}error: Uncaught (in promise) (FiberFailure) Error: {
"_id": "Either",
"_tag": "Left",
"left": {
"name": "ParameterNotFound",
"$fault": "client",
"$metadata": {
"httpStatusCode": 400,
"requestId": "d28f8884-59ad-4694-b9cc-62ce28e3146c",
"attempts": 1,
"totalRetryDelay": 0
},
"__type": "ParameterNotFound",
"message": "UnknownError"
}
}
