Add Swagger and relation splitting features

- Add swagger flag to generate @ApiProperty decorators alongside class-validator decorators
- Add separateRelationFields flag to split models into base/relation classes for better NestJS integration
- Support for all Prisma types including proper Float handling with @IsNumber
- Comprehensive test coverage for both new features
- Updated documentation with examples and usage patterns
- Backward compatible - existing schemas work unchanged

Fixes #18

Author: omar-dulaimi

CLAUDE.md

@@ -64,13 +64,99 @@ generated/
     └── index.ts
 ```
 
+### Configuration Options
+
 The generator is configured via Prisma schema:
 ```prisma
+generator class_validator {
+  provider               = "prisma-class-validator-generator"
+  output                 = "./generated"  // optional, defaults to ./generated
+  swagger                = "true"         // optional, adds @ApiProperty decorators
+  separateRelationFields = "true"         // optional, creates separate base/relation classes
+}
+```
+
+#### Configuration Flags
+
+**`swagger`** (optional, default: `false`)
+- Adds NestJS Swagger `@ApiProperty` decorators alongside class-validator decorators
+- Includes type information, examples, array handling, and enum values
+- Useful for automatic API documentation generation in NestJS applications
+
+**`separateRelationFields`** (optional, default: `false`)
+- Splits models into separate base and relation classes for better NestJS integration
+- Creates `ModelBase` (scalar fields only), `ModelRelations` (relations only), and combined `Model` class
+- Enables use of NestJS mapped types like `PickType`, `PartialType`, etc.
+- Perfect for DTOs that need to exclude relations or work with specific field subsets
+
+#### Example Usage
+
+**Basic Usage (class-validator only):**
+```prisma
+generator class_validator {
+  provider = "prisma-class-validator-generator"
+  output   = "./generated"
+}
+```
+Generates:
+```typescript
+export class User {
+  @IsDefined()
+  @IsInt()
+  id!: number;
+
+  @IsDefined()
+  @IsString()
+  email!: string;
+}
+```
+
+**With Swagger Support:**
+```prisma
 generator class_validator {
   provider = "prisma-class-validator-generator"
-  output   = "./generated"  // optional, defaults to ./generated
+  output   = "./generated"
+  swagger  = "true"
+}
+```
+Generates:
+```typescript
+export class User {
+  @IsDefined()
+  @ApiProperty({ example: 'Generated by autoincrement', type: "integer" })
+  @IsInt()
+  id!: number;
+
+  @IsDefined()
+  @ApiProperty({ type: "string" })
+  @IsString()
+  email!: string;
+}
+```
+
+**With Relation Splitting:**
+```prisma
+generator class_validator {
+  provider               = "prisma-class-validator-generator"
+  output                 = "./generated"
+  separateRelationFields = "true"
+}
+```
+Generates:
+- `UserBase.model.ts` - Only scalar fields with decorators
+- `UserRelations.model.ts` - Only relation fields with decorators  
+- `User.model.ts` - Combined class extending UserBase with relations
+
+**Full NestJS Integration:**
+```prisma
+generator class_validator {
+  provider               = "prisma-class-validator-generator"
+  output                 = "./generated"
+  swagger                = "true"
+  separateRelationFields = "true"
 }
 ```
+Perfect for NestJS APIs with automatic Swagger docs and flexible DTOs.
 
 ## Modern Development Setup (Prisma 6+)
 

README.md

@@ -235,8 +235,10 @@ Customize the generator behavior:
 
 ```prisma
 generator class_validator {
-  provider = "prisma-class-validator-generator"
-  output   = "./src/models"           // Output directory
+  provider               = "prisma-class-validator-generator"
+  output                 = "./src/models"           // Output directory
+  swagger                = "true"                   // Add Swagger decorators
+  separateRelationFields = "true"                   // Split base/relation classes
 }
 ```
 
@@ -245,6 +247,53 @@ generator class_validator {
 | Option | Type | Default | Description |
 |--------|------|---------|-------------|
 | `output` | `string` | `"./generated"` | Output directory for generated models |
+| `swagger` | `string` | `"false"` | Add NestJS `@ApiProperty` decorators for Swagger docs |
+| `separateRelationFields` | `string` | `"false"` | Generate separate base and relation classes for flexible DTOs |
+
+### 🌟 New in v6.0.0-beta.1: NestJS & Swagger Integration
+
+#### Swagger Support (`swagger = "true"`)
+
+Automatically generates NestJS Swagger decorators alongside class-validator decorators:
+
+```typescript
+export class User {
+  @IsDefined()
+  @ApiProperty({ example: 'Generated by autoincrement', type: "integer" })
+  @IsInt()
+  id!: number;
+
+  @IsDefined()
+  @ApiProperty({ type: "string" })
+  @IsString()
+  email!: string;
+
+  @IsOptional()
+  @ApiProperty({ type: "string", required: false })
+  @IsString()
+  name?: string | null;
+}
+```
+
+#### Relation Field Splitting (`separateRelationFields = "true"`)
+
+Perfect for NestJS DTOs - generates separate classes for maximum flexibility:
+
+- **`UserBase.model.ts`** - Only scalar fields with validation decorators
+- **`UserRelations.model.ts`** - Only relation fields  
+- **`User.model.ts`** - Combined class extending UserBase
+
+This enables powerful NestJS patterns:
+```typescript
+// Create DTO without relations using PickType
+export class CreateUserDto extends PickType(UserBase, ['email', 'name']) {}
+
+// Update DTO with partial fields
+export class UpdateUserDto extends PartialType(UserBase) {}
+
+// Full model with relations for responses
+export class UserResponseDto extends User {}
+```
 
 ## 📚 Advanced Usage
 
@@ -457,7 +506,7 @@ This project is licensed under the MIT License - see the [LICENSE](LICENSE) file
 ---
 
 <div align="center">
-  <p>Made with ❤️ by the Prisma Class Validator Generator team</p>
+  <p>Made with ❤️ by <strong>Omar Dulaimi</strong></p>
   <p>
     <a href="https://github.com/omar-dulaimi/prisma-class-validator-generator/stargazers">⭐ Star us on GitHub</a> •
     <a href="https://github.com/omar-dulaimi/prisma-class-validator-generator/issues">🐛 Report Issues</a> •