Validate body

[Sorikairox]

When using @Body decorator, we should be able to validate the body we are receiving

Using our validatte package, we should validate bodies.

This should be an opt-out feature, we validate by default.

opt-out may look like this :

export const bootstrap = async () => {
  const application = new DanetApplication();
  application.disableBodyValidation();
  await application.init(AppModule);
  return application;
}

Upon injecting the body in router.ts we can validate it, and throws a 400 Bad Request containing validateObject return value.

[talis-fb]

I could take this issue. But it isn't totally clear for me what exactly you mean with "validate" the body. I took a look at Body decorator's code and saw that the value of body is extracted inside a try catch block.

The validation would be to change the simple throw e by a handler to return a 400 Bad Request??

[Sorikairox]

Hi @talis-fb , thank you for coming here !

Here is an example of usage for the new feature requested by this issue :

First, we define how our body should look like by defining a class and using our package 'validatte'.

class MyBodyDTO {
 @IsString()
 @IsEmail()
 public email:string;

 @IsString()
 @LengthGreaterThan(5)
 public username: string;
}

The @Body decorator should, if user has not opt-out the body validation, call 'validatte' function validateObject on the body to ensure the body is a correct MyBodyDTO.

If not, it should throw a 400 with detailed error.

Hope this help !

[talis-fb]

Yeah! It helped me a lot! Thanks for explaination =D. I'll work on the feature!

[Sorikairox]

@talis-fb Cool ! Feel free to join our discord https://discord.gg/Q7ZHuDPgjA