GRgraphweaver·Aug 27, 2023
We add validation using https://github.com/typestack/class-validator.
I will make sure we get this documented.
In Show HN: Graphweaver – Instant GraphQL API on Postgres, MySQL, SQLite and Moretypestack
class-validator
TypeScript2019–2023
typestack / class-validator
class-validator
Decorator-based property validation for classes.
4Distinct people
5Mentions
0Explicit recommenders
11.9KGitHub stars
What to know before exploring
What it is
Decorator-based property validation for classes.
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
No recommendation phrase was found in the indexed comments.
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Also in these discussions
- typestack/class-transformer · linked in 2 of the same discussions
Mentioned in the same Hacker News threads. That is not proof they are substitutes.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 1:49:46 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year5 dated mentions
Observed mentions: 2019-08-22 14:08:12 UTC to 2023-08-27 21:27:56 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 3 | 1 | 2 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
5 sourcesBeanvalidation Like Validators in TypeScript
1 points · Open discussionI use a combination of class-transformer[1] and then class-validator[2].
First transform the JSON into proper class-objects and then validate the object for correctnes.
IMHO this has nothing to do with TypeScript because in your runtime all the type information is gone and you need to validate the remote data never the less. TypeScript can help you structure your validations but you need to write them.
[1] https://github.com/typestack/class-transformer
[2] https://github.com/typestack/class-validator
In How porting to TypeScript solved our API woesThere is also class-validator, which I've used and I find elegant and working well:
https://github.com/typestack/class-validator
In Designing the perfect TypeScript schema validation libraryThere is also class-transformer[1] and class-validator[2] which also do the same job but integrate a bit better into the whole typescript cosmos.
[1] https://github.com/typestack/class-transformer
[2] https://github.com/typestack/class-validator
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