@ParsedBody

export const ParsedBody = () => (target, key, index) => {
  Reflect.defineMetadata(PARSED_BODY_METADATA, { index }, target[key]);
};

import { Controller } from '@nestjs/common';
import { Crud, Override, ParsedBody, ParsedRequest, CrudRequest } from '@nestjsx/crud';
import { User } from './user.entity';
import { CreateUserDto } from './dto/create-user.dto';
import { UserService } from './user.service';

@Crud({
  model: { type: User },
})
@Controller('users')
export class UserController {
  constructor(public service: UserService) {}

  @Override()
  async createOne(
    @ParsedBody() dto: CreateUserDto,
    @ParsedRequest() req: CrudRequest
  ) {
    console.log('Validated user data:', dto);
    return this.service.createOne(req, dto);
  }
}

import { CreateManyDto } from '@nestjsx/crud';

@Crud({
  model: { type: Product },
})
@Controller('products')
export class ProductController implements CrudController<Product> {
  constructor(public service: ProductService) {}

  get base(): CrudController<Product> {
    return this;
  }

  @Override('createManyBase')
  async createBulk(
    @ParsedBody() dto: CreateManyDto<Product>,
    @ParsedRequest() req: CrudRequest
  ) {
    console.log(`Creating ${dto.bulk.length} products`);
    
    // Custom validation or processing
    for (const product of dto.bulk) {
      if (product.price < 0) {
        throw new BadRequestException('Price cannot be negative');
      }
    }
    
    return this.base.createManyBase(req, dto);
  }
}

@Crud({
  model: { type: Post },
})
@Controller('posts')
export class PostController implements CrudController<Post> {
  constructor(
    public service: PostService,
    private slugService: SlugService,
  ) {}

  get base(): CrudController<Post> {
    return this;
  }

  @Override()
  async createOne(
    @ParsedBody() dto: Post,
    @ParsedRequest() req: CrudRequest,
    @Request() request
  ) {
    // Add computed fields
    dto.slug = this.slugService.generate(dto.title);
    dto.authorId = request.user.id;
    dto.createdAt = new Date();
    
    // Sanitize content
    dto.content = this.sanitizeHtml(dto.content);
    
    return this.base.createOneBase(req, dto);
  }

  private sanitizeHtml(html: string): string {
    // Your sanitization logic
    return html;
  }
}

@Crud({
  model: { type: Task },
})
@Controller('tasks')
export class TaskController implements CrudController<Task> {
  constructor(public service: TaskService) {}

  get base(): CrudController<Task> {
    return this;
  }

  @Override('updateOneBase')
  async updateOne(
    @ParsedRequest() req: CrudRequest,
    @ParsedBody() dto: Task
  ) {
    // Track modifications
    dto.updatedAt = new Date();
    
    // Business rule: can't change status to completed if no assignee
    if (dto.status === 'completed' && !dto.assigneeId) {
      throw new BadRequestException('Cannot complete task without assignee');
    }
    
    return this.base.updateOneBase(req, dto);
  }
}

import { IsString, IsEmail, MinLength, IsOptional } from 'class-validator';
import { Transform } from 'class-transformer';

export class CreateUserDto {
  @IsString()
  @MinLength(2)
  firstName: string;

  @IsString()
  @MinLength(2)
  lastName: string;

  @IsEmail()
  @Transform(({ value }) => value.toLowerCase())
  email: string;

  @IsOptional()
  @IsString()
  bio?: string;
}

@Crud({
  model: { type: User },
  dto: {
    create: CreateUserDto,
    update: UpdateUserDto,
  },
})
@Controller('users')
export class UserController implements CrudController<User> {
  constructor(public service: UserService) {}

  get base(): CrudController<User> {
    return this;
  }

  @Override()
  async createOne(
    @ParsedBody() dto: CreateUserDto,
    @ParsedRequest() req: CrudRequest
  ) {
    // dto is already validated and transformed
    console.log('Email (lowercase):', dto.email);
    
    // Check for existing user
    const exists = await this.service.findByEmail(dto.email);
    if (exists) {
      throw new ConflictException('Email already registered');
    }
    
    return this.base.createOneBase(req, dto);
  }
}

import { UseInterceptors, UploadedFile } from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';

@Crud({
  model: { type: Document },
})
@Controller('documents')
export class DocumentController implements CrudController<Document> {
  constructor(
    public service: DocumentService,
    private storageService: StorageService,
  ) {}

  get base(): CrudController<Document> {
    return this;
  }

  @Override()
  @UseInterceptors(FileInterceptor('file'))
  async createOne(
    @ParsedBody() dto: Document,
    @ParsedRequest() req: CrudRequest,
    @UploadedFile() file: Express.Multer.File
  ) {
    // Upload file to storage
    const fileUrl = await this.storageService.upload(file);
    
    // Add file URL to DTO
    dto.fileUrl = fileUrl;
    dto.fileName = file.originalname;
    dto.fileSize = file.size;
    
    return this.base.createOneBase(req, dto);
  }
}

@Crud({
  model: { type: Order },
})
@Controller('orders')
export class OrderController implements CrudController<Order> {
  constructor(
    public service: OrderService,
    private inventoryService: InventoryService,
    private paymentService: PaymentService,
  ) {}

  get base(): CrudController<Order> {
    return this;
  }

  @Override()
  async createOne(
    @ParsedBody() dto: Order,
    @ParsedRequest() req: CrudRequest,
    @Request() request
  ) {
    // Validate inventory
    for (const item of dto.items) {
      const available = await this.inventoryService.checkStock(item.productId, item.quantity);
      if (!available) {
        throw new BadRequestException(`Insufficient stock for product ${item.productId}`);
      }
    }
    
    // Calculate totals
    dto.subtotal = dto.items.reduce((sum, item) => sum + (item.price * item.quantity), 0);
    dto.tax = dto.subtotal * 0.1;
    dto.total = dto.subtotal + dto.tax;
    
    // Set customer
    dto.customerId = request.user.id;
    
    // Create order
    const order = await this.base.createOneBase(req, dto);
    
    // Process payment
    if (dto.paymentMethod) {
      await this.paymentService.charge(order.id, dto.total, dto.paymentMethod);
    }
    
    return order;
  }
}

interface CreateManyDto<T> {
  bulk: T[];
}

@Override('createManyBase')
async createBulk(
  @ParsedBody() dto: CreateManyDto<Product>
) {
  console.log('Number of items:', dto.bulk.length);
  
  dto.bulk.forEach((product, index) => {
    console.log(`Product ${index}:`, product);
  });
  
  return this.service.createMany(dto);
}