4 ms·

ForgJs – A lightweight object validator

38 points by forg_js 8y ago

coding123 8y ago
Very nice API. I do have a question, and not to be dismissive, but is there a strong reason to use Forg over Validatejs. The APIs are pretty similar so I don't know what I would choose Forg over ValidateJS. Some things to address: * Typescript definitions * ES/6 import documentation * There are a lot of tiny typos in the readme, it would make sense to spell check that. Thanks for the contribution.
- forg_js 8y ago
  Thank you, i tried to fix typos but im sure some are left. I dont think that there is a strong reason, I just wanted a modern lightweight validation library where rules are easy to write and closer to buisness rules
deleted 8y ago
[deleted]
LiterallyDoge 8y ago
Very cool idea. Something I would enjoy using is a shorthand syntax for validation rule object declarations eg: new Validator = ({ age: 'int 22-48' }); If memory serves you can parse that type of string in the Validator constructor and insert the Rule structures you already have in place of it.
- forg_js 8y ago
  I can't make this possible becacuse if there are nested objects forgjs cant make the diference between a rule and a value
Siilwyn 8y ago
With two mature packages doing the same: Joi & ajv. What made you write this? https://www.npmjs.com/package/joi https://www.npmjs.com/package/joi https://www.npmjs.com/package/ajv https://www.npmjs.com/package/ajv
- chickenfries 8y ago
  Joi is much larger. https://bundlephobia.com/result?p=joi@14.3.0 https://bundlephobia.com/result?p=joi@14.3.0
  - andyfleming 8y ago
    Once forg has more features, won't it be bigger as well?
    - chickenfries 8y ago
      Not if their goal is to be “lightweight” like they say it is.
- gyoubu 8y ago
  Came here looking to find / provide this comment.
jaklfdjkasf 8y ago
This is very cool, but I highly recommend using a standard like JSON schema instead. It will make your life easier long term. The initial hurdle of learning may be harder, but lots of libraries/languages support JSON schema. If you are using typescript, I highly recommend using a generator to create JSON schema definitions. This one has worked really well recently https://github.com/YousefED/typescript-json-schema https://github.com/YousefED/typescript-json-schema
- pagnol 8y ago
  Been using runtypes and it works well enough, but now I'm wondering if this may be a smarter option.
mtrpcic 8y ago
Out of curiosity, why have a singular Rule class that has a type (with internal branching logic based on that field), rather than separate Rule classes for each type of Rule, with Rule being a base class that users can extend to define their own rules?
nnq 8y ago
anything like this for Python?
- lfx 8y ago
  I have seen used this quite a bit https://github.com/Julian/jsonschema https://github.com/Julian/jsonschema Here is some sample https://gist.github.com/nmarley/afe61a36f71ed1e4a9728c0f5f6f7f6f https://gist.github.com/nmarley/afe61a36f71ed1e4a9728c0f5f6f...
dstjean 8y ago
Any attributes for required/optional fields?
- forg_js 8y ago
  by default every value is required, until optional is set to true
zhs 8y ago
I've found https://github.com/ianstormtaylor/superstruct https://github.com/ianstormtaylor/superstruct to be really flexible/powerful.

38 points by forg_js 8y ago

Very nice API. I do have a question, and not to be dismissive, but is there a strong reason to use Forg over Validatejs. The APIs are pretty similar so I don't know what I would choose Forg over ValidateJS. Some things to address: * Typescript definitions * ES/6 import documentation * There are a lot of tiny typos in the readme, it would make sense to spell check that. Thanks for the contribution.

forg_js 8y ago
Thank you, i tried to fix typos but im sure some are left. I dont think that there is a strong reason, I just wanted a modern lightweight validation library where rules are easy to write and closer to buisness rules

deleted 8y ago

[deleted]

LiterallyDoge 8y ago

Very cool idea. Something I would enjoy using is a shorthand syntax for validation rule object declarations eg: new Validator = ({ age: 'int 22-48' }); If memory serves you can parse that type of string in the Validator constructor and insert the Rule structures you already have in place of it.

forg_js 8y ago
I can't make this possible becacuse if there are nested objects forgjs cant make the diference between a rule and a value

Siilwyn 8y ago

With two mature packages doing the same: Joi & ajv. What made you write this? https://www.npmjs.com/package/joi https://www.npmjs.com/package/joi https://www.npmjs.com/package/ajv https://www.npmjs.com/package/ajv

chickenfries 8y ago
Joi is much larger. https://bundlephobia.com/result?p=joi@14.3.0 https://bundlephobia.com/result?p=joi@14.3.0
- andyfleming 8y ago
  Once forg has more features, won't it be bigger as well?
  - chickenfries 8y ago
    Not if their goal is to be “lightweight” like they say it is.
gyoubu 8y ago
Came here looking to find / provide this comment.

jaklfdjkasf 8y ago

This is very cool, but I highly recommend using a standard like JSON schema instead. It will make your life easier long term. The initial hurdle of learning may be harder, but lots of libraries/languages support JSON schema. If you are using typescript, I highly recommend using a generator to create JSON schema definitions. This one has worked really well recently https://github.com/YousefED/typescript-json-schema https://github.com/YousefED/typescript-json-schema

pagnol 8y ago
Been using runtypes and it works well enough, but now I'm wondering if this may be a smarter option.

mtrpcic 8y ago

Out of curiosity, why have a singular Rule class that has a type (with internal branching logic based on that field), rather than separate Rule classes for each type of Rule, with Rule being a base class that users can extend to define their own rules?

nnq 8y ago

anything like this for Python?

lfx 8y ago
I have seen used this quite a bit https://github.com/Julian/jsonschema https://github.com/Julian/jsonschema Here is some sample https://gist.github.com/nmarley/afe61a36f71ed1e4a9728c0f5f6f7f6f https://gist.github.com/nmarley/afe61a36f71ed1e4a9728c0f5f6f...

dstjean 8y ago

Any attributes for required/optional fields?

forg_js 8y ago
by default every value is required, until optional is set to true

zhs 8y ago

I've found https://github.com/ianstormtaylor/superstruct https://github.com/ianstormtaylor/superstruct to be really flexible/powerful.