diff --git a/package.json b/package.json
index 6c32638..2ddb679 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
-	"name": "prisma-class-generator",
-	"version": "0.2.9",
+	"name": "prisma-class-generator-custom",
+	"version": "1.2.5",
 	"description": "Class generator from Prisma schema",
 	"main": "dist/index.js",
 	"license": "MIT",
@@ -10,10 +10,10 @@
 		"typescript",
 		"generator"
 	],
-	"homepage": "https://github.com/kimjbstar/prisma-class-generator",
+	"homepage": "https://github.com/ABHwan/prisma-class-generator",
 	"repository": {
 		"type": "git",
-		"url": "git://github.com/kimjbstar/prisma-class-generator.git"
+		"url": "git://github.com/ABHwan/prisma-class-generator.git"
 	},
 	"scripts": {
 		"format": "prettier --write \"src/**/*.ts\"",
@@ -29,8 +29,8 @@
 		"node": ">=14"
 	},
 	"author": {
-		"name": "kimjbstar",
-		"email": "kimjbstar@gmail.com"
+		"name": "ABHwan",
+		"email": "say5131@gmail.com"
 	},
 	"dependencies": {
 		"@prisma/client": "^5.5.2",
diff --git a/prisma/postgresql.prisma b/prisma/postgresql.prisma
index 9560e8b..a420e80 100755
--- a/prisma/postgresql.prisma
+++ b/prisma/postgresql.prisma
@@ -13,6 +13,8 @@ generator prismaClassGenerator {
   output                 = "../src/_gen/prisma-class"
   dryRun                 = "false"
   separateRelationFields = "false"
+  useValidator           = "false"
+  rewrite                = "false"
 }
 
 enum ProductType {
diff --git a/src/components/field.component.ts b/src/components/field.component.ts
index 9c78f2d..3d3e392 100755
--- a/src/components/field.component.ts
+++ b/src/components/field.component.ts
@@ -26,7 +26,7 @@ export class FieldComponent extends BaseComponent implements Echoable {
 
 		let defaultValue = ''
 		if (this.default) {
-			if (!isNaN(Date.parse(this.default))) {
+			if (this.type === 'Date' && !isNaN(Date.parse(this.default))) {
 				defaultValue = `= new Date('${this.default}')`
 			} else {
 				defaultValue = `= ${this.default}`
diff --git a/src/convertor.ts b/src/convertor.ts
index c08d547..8d86395 100755
--- a/src/convertor.ts
+++ b/src/convertor.ts
@@ -3,13 +3,7 @@ import { ClassComponent } from './components/class.component'
 import { DecoratorComponent } from './components/decorator.component'
 import { FieldComponent } from './components/field.component'
 import { PrismaClassGeneratorConfig } from './generator'
-import {
-	arrayify,
-	capitalizeFirst,
-	uniquify,
-	wrapArrowFunction,
-	wrapQuote,
-} from './util'
+import { arrayify, capitalizeFirst, uniquify, wrapArrowFunction, wrapQuote } from './util'
 
 /** BigInt, Boolean, Bytes, DateTime, Decimal, Float, Int, JSON, String, $ModelName */
 type DefaultPrismaFieldType =
@@ -185,6 +179,44 @@ export class PrismaConvertor {
 		return decorator
 	}
 
+	extractValidatorDecoratorsFromField = (
+		dmmfField: DMMF.Field,
+	): DecoratorComponent[] => {
+		const decorators: DecoratorComponent[] = []
+		const importFrom = 'class-validator'
+		let name: string;
+		switch (dmmfField.type) {
+			case 'Int':
+				name = 'IsInt'
+				break;
+			case 'DateTime':
+				name = 'IsDate'
+				break;
+			case 'String':
+				name = 'IsString'
+				break;
+			case 'Boolean':
+				name = 'IsBoolean'
+				break;
+		}
+		if (name && !dmmfField.isList) {
+			decorators.push(new DecoratorComponent({ name, importFrom }))
+		}
+
+		if (dmmfField.isRequired) {
+			name = 'IsDefined'
+			decorators.push(new DecoratorComponent({ name, importFrom }))
+		} else {
+			name = 'IsOptional'
+			decorators.push(new DecoratorComponent({ name, importFrom }))
+		}
+		if (dmmfField.kind === 'enum') {
+			name = 'IsEnum'
+			decorators.push(new DecoratorComponent({ name, importFrom, params: [`${String(dmmfField.type)}`] }))
+		}
+		return decorators;
+	}
+
 	getClass = (input: ConvertModelInput): ClassComponent => {
 		/** options */
 		const options = Object.assign(
@@ -212,7 +244,11 @@ export class PrismaConvertor {
 		const relationTypes = uniquify(
 			model.fields
 				.filter(
-					(field) => field.relationName && (this._config.separateRelationFields ? true : model.name !== field.type),
+					(field) =>
+						field.relationName &&
+						(this._config.separateRelationFields
+							? true
+							: model.name !== field.type),
 				)
 				.map((v) => v.type),
 		)
@@ -343,6 +379,11 @@ export class PrismaConvertor {
 			field.decorators.push(decorator)
 		}
 
+		if (this.config.useValidator) {
+			const decorators = this.extractValidatorDecoratorsFromField(dmmfField)
+			field.decorators.push(...decorators)
+		}
+
 		if (this.config.useGraphQL) {
 			const decorator =
 				this.extractTypeGraphQLDecoratorFromField(dmmfField)
diff --git a/src/generator.ts b/src/generator.ts
index 608c23f..5d076d8 100755
--- a/src/generator.ts
+++ b/src/generator.ts
@@ -2,13 +2,7 @@ import { GeneratorOptions } from '@prisma/generator-helper'
 import { parseEnvValue } from '@prisma/internals'
 import * as path from 'path'
 import { PrismaConvertor } from './convertor'
-import {
-	getRelativeTSPath,
-	parseBoolean,
-	parseNumber,
-	prettierFormat,
-	writeTSFile,
-} from './util'
+import { getRelativeTSPath, parseBoolean, parseNumber, prettierFormat, rmdir, writeTSFile } from './util'
 import { INDEX_TEMPLATE } from './templates/index.template'
 import { ImportComponent } from './components/import.component'
 import * as prettier from 'prettier'
@@ -53,6 +47,14 @@ export const PrismaClassGeneratorOptions = {
 		defaultValue: false,
 		desc: 'preserve default nullable behavior',
 	},
+	useValidator: {
+		desc: 'use nest js class-validator decorators',
+		defaultValue: false,
+	},
+	rewrite: {
+		defaultValue: false,
+		desc: 'rewrite output at generate'
+	},
 } as const
 
 export type PrismaClassGeneratorOptionsKeys =
@@ -133,6 +135,8 @@ export class PrismaClassGenerator {
 		const config = this.getConfig()
 		this.setPrismaClientPath()
 
+		await rmdir(output, config.rewrite)
+
 		const convertor = PrismaConvertor.getInstance()
 		convertor.dmmf = dmmf
 		convertor.config = config
diff --git a/src/util.ts b/src/util.ts
index 9f44edc..2487ca9 100755
--- a/src/util.ts
+++ b/src/util.ts
@@ -89,3 +89,17 @@ export const writeTSFile = (
 export const prettierFormat = (content: string, options: Options = {}) => {
 	return format(content, { ...options, parser: 'typescript' })
 }
+
+export const rmdir = async (
+	dirPath: string,
+	rewrite: boolean = false,
+) => {
+	if (fs.existsSync(dirPath) && rewrite) {
+		const deletePromises = fs.readdirSync(dirPath).map(async (file) => {
+			const filePath = path.join(dirPath, file)
+			log(`Remove ${filePath}`)
+			return fs.unlinkSync(filePath)
+		})
+		await Promise.all(deletePromises)
+	}
+}