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NestJS Filters with Swagger deepObject (example: `?filters[name]=thing1&filters[description]=thing2`)
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import { applyDecorators } from '@nestjs/common'; | |
import { ApiExtraModels, ApiQuery, getSchemaPath } from '@nestjs/swagger'; | |
/** | |
* Combines Swagger Decorators to create a description for `filters[name]=something` | |
* - has support for swagger | |
* - automatic transformation with nestjs | |
*/ | |
// eslint-disable-next-line @typescript-eslint/ban-types,@typescript-eslint/explicit-module-boundary-types | |
export function ApiFilterQuery(fieldName: string, filterDto: Function) { | |
return applyDecorators( | |
ApiExtraModels(filterDto), | |
ApiQuery({ | |
required: false, | |
name: fieldName, | |
style: 'deepObject', | |
explode: true, | |
type: 'object', | |
schema: { | |
$ref: getSchemaPath(filterDto), | |
}, | |
}), | |
); | |
} |
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import { Controller, Get, Query } from '@nestjs/common'; | |
import { ApiOperation } from '@nestjs/swagger'; | |
import { ApiFilterQuery } from './api-filter-query'; | |
import { ApiPropertyOptional } from '@nestjs/swagger'; | |
import { IsOptional, IsString } from 'class-validator'; | |
class ThingFiltersDto { | |
@ApiPropertyOptional({ description: 'Thing Name', example: 'Ficus' }) | |
@IsString() | |
@IsOptional() | |
readonly name?: string; | |
@ApiPropertyOptional({ description: 'Thing Description', example: 'Large' }) | |
@IsString() | |
@IsOptional() | |
readonly description?: string; | |
} | |
@Controller() | |
export class FlowerController { | |
@Get('things') | |
@ApiOperation({ summary: ' List/Filter' }) | |
@ApiFilterQuery('filters', ThingFiltersDto) | |
async list(@Query('filters') filters: ThingFiltersDto): Promise<void> { | |
console.log({ filters }); | |
// from: filters[name]=thing1&filters[description]=thing2 | |
// to: { name: "thing1", description: "thing2" | |
} | |
} |
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