Utilize Pipe for every instance of a variable in the Controller

Question

Utilize Pipe for every instance of a variable in the Controller

In my controller, I have multiple requests (POST, GET etc.) where the path includes an id parameter that needs to be a number string. I want to validate this parameter once and have it apply to all instances.

Here is the current code snippet:

  @Get(':account_id')
  @ApiOperation({
    description: 'Get account information',
    operationId: 'getAccount',
    title: 'Get account information',
  })
  @ApiOkResponse({ type: AccountDto })
  @ApiUnauthorizedResponse({ type: ApiErrorDto })
  @ApiForbiddenResponse({ type: ApiErrorDto })
  @ApiNotFoundResponse({ type: ApiErrorDto })
  @ApiBadRequestResponse({ type: ApiErrorDto })
  @ApiImplicitParam({ name: 'account_id', description: 'The account Id' })
  async findOne(@Param('account_id', new ParseIntPipe()) accountId: string): Promise<AccountDto> {
    return await this.accountService.findOne(accountId);
  }

I find myself needing to call the validation pipe every time.

Is there a way for me to apply validation to all occurrences of `account_id` variables in my controller?

typescript rest nestjs

Answer 1

Answer №1

When working with classes in TypeScript, you can easily apply validation rules to their properties.

An example of using a class as a parameter with validation:

@Get(':id')
findOne(@Param() params: FindOneParams) {
  return params.id;
}

Here is the corresponding class for the above controller method:

import { IsNumberString } from 'class-validator';

export class FindOneParams {
  @IsNumberString()
  id: number;
}

Answer 2

When working with classes in TypeScript, you can easily apply validation rules to their properties.

An example of using a class as a parameter with validation:

@Get(':id')
findOne(@Param() params: FindOneParams) {
  return params.id;
}

Here is the corresponding class for the above controller method:

import { IsNumberString } from 'class-validator';

export class FindOneParams {
  @IsNumberString()
  id: number;
}

Utilize Pipe for every instance of a variable in the Controller

Answer №1

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