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packages/common/interfaces/features/pipe-transform.interface.ts
45 строк
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Kamil Mysliwiec
Merge pull request #3085 from nestjs/renovate/sequelize-5.x
02 окт 2019, 22:46
02 окт 2019, 22:46
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import { Type } from '../type.interface'; import { Paramtype } from './paramtype.interface'; export type Transform<T = any> = (value: T, metadata: ArgumentMetadata) => any; /** * Interface describing a pipe implementation's `transform()` method metadata argument. * * @see [Pipes](https://docs.nestjs.com/pipes) * * @publicApi */ export interface ArgumentMetadata { /** * Indicates whether argument is a body, query, param, or custom parameter */ readonly type: Paramtype; /** * Underlying base type (e.g., `String`) of the parameter, based on the type * definition in the route handler. */ readonly metatype?: Type<any> | undefined; /** * String passed as an argument to the decorator. * Example: `@Body('userId')` would yield `userId` */ readonly data?: string | undefined; } /** * Interface describing implementation of a pipe. * * @see [Pipes](https://docs.nestjs.com/pipes) * * @publicApi */ export interface PipeTransform<T = any, R = any> { /** * Method to implement a custom pipe. Called with two parameters * * @param value argument before it is received by route handler method * @param metadata contains metadata about the value */ transform(value: T, metadata: ArgumentMetadata): R; }