15 replies

Option to Effect.fail

given a function that returns an

Effect<_, _, Option<T>>

Effect<_, _, Option<T>>

, i want to produce an error when the option is none and otherwise unwrap the some value. I will deal with the error later on. I came to this solution after a bit of playing around, is this a reasonable way of doing this?

const user = yield* _(
    userService.getUserByUsernameOrEmail(tenantId, usernameOrEmail),
    Effect.flatMap(Effect.orElseFail(() => new UserNotFoundError())),
);

const user = yield* _(
    userService.getUserByUsernameOrEmail(tenantId, usernameOrEmail),
    Effect.flatMap(Effect.orElseFail(() => new UserNotFoundError())),
);

Effect Community•3y ago•

15 replies

James Birtles

Option to Effect.fail

given a function that returns an

Effect<_, _, Option<T>>

Effect<_, _, Option<T>>

const user = yield* _(
    userService.getUserByUsernameOrEmail(tenantId, usernameOrEmail),
    Effect.flatMap(Effect.orElseFail(() => new UserNotFoundError())),
);

const user = yield* _(
    userService.getUserByUsernameOrEmail(tenantId, usernameOrEmail),
    Effect.flatMap(Effect.orElseFail(() => new UserNotFoundError())),
);

Option to Effect.fail

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