All files / src/options ValidationErrorsFormatter.ts

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1x
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
import { ValidationError } from 'class-validator';
 
export class ValidationErrorsFormatter {
    /**
     * @param validationErrors
     * @returns {string}
     */
    public static format (validationErrors: ValidationError[]): string {
        let errorsArray: string[] = [];
 
        for (const error of validationErrors) {
            errorsArray.push(ValidationErrorsFormatter.formatError(error));
        }
 
        return errorsArray.join('\n');
    }
 
    /**
     * @param validationError
     * @returns {string}
     */
    private static formatError (validationError: ValidationError): string {
        let errorString: string = `\`${validationError.property}\` errors:\n`,
            constraints: {[type: string]: string} = validationError.constraints;
 
        for (const constraint in constraints) {
            if (!constraints.hasOwnProperty(constraint)) {
                continue;
            }
 
            errorString += `    - ${constraints[constraint]}\n`;
        }
 
        return errorString;
    }
}