Simple Typescript Validation and Mapping

• Clean entity validation and auto-mapping.
• Prevents overposting attacks.
• Simple and extensible.

Usage

Define your target model:

export class TargetModel {
  requiredField: string = "";
  optionalField: string | null = null;
}

And validate it! For example, if you want to check a request on ExpressJS:

const [targetModel, isValid, validationErrors] = validateModel(TargetModel, req.body);
    
if (!isValid) {
    res.status(400).send(validationErrors);
} else {
    const result = await doSomethingWithTargetModel({
        additionalFields: true,
        ...command,
    } as targetWithAdditionalFields)

    res.send(result);
}

For more examples, see sample.ts. To run this project locally simply use these commands:

npm install
npm start

FAQ

• How to integrate this with my project? Just copy the contents from validator.ts into your project, extend and modify as required.

• Why there is no NPM package? This is a base code that you can use, extend and customize so there isn't (and probably won't be) an available NPM package.