Graphql 输入对象类型“TypeName”必须定义一个或多个字段

我正在试验

NestJS

和

TypeGraphQL

。我有一个猫的模型

import { Document } from 'mongoose';
import { ObjectType, InputType, Field, ID } from 'type-graphql';

export interface Cat extends Document {
  readonly name: string;
  readonly age?: number;
}

class CatBase {
  @Field()
  name: string;

  @Field({ nullable: true })
  age?: number;
}

@ObjectType()
export class CatObjectType extends CatBase implements Cat {
  @Field(type => ID)
  id: string;
}

@InputType()
export class CatInputType extends CatBase implements Cat {
}

在这里，我试图在

CatObjectType

和

CatInputType

中重用

BaseCat

。但是我得到了这个错误：

[ { GraphQLError: Input Object type CatInputType must define one or more fields.
      at SchemaValidationContext.reportError (/Users/pavel/Dev/exampleproject/node_modules/graphql/type/validate.js:90:19)
      at validateInputFields (/Users/pavel/Dev/exampleproject/node_modules/graphql/type/validate.js:432:13)
      at validateTypes (/Users/pavel/Dev/exampleproject/node_modules/graphql/type/validate.js:240:7)
      at validateSchema (/Users/pavel/Dev/exampleproject/node_modules/graphql/type/validate.js:54:3)
      at graphqlImpl (/Users/pavel/Dev/exampleproject/node_modules/graphql/graphql.js:79:62)
      at /Users/pavel/Dev/exampleproject/node_modules/graphql/graphql.js:28:59
      at new Promise (<anonymous>)
      at Object.graphql (/Users/pavel/Dev/exampleproject/node_modules/graphql/graphql.js:26:10)
      at Function.<anonymous> (/Users/pavel/Dev/exampleproject/node_modules/type-graphql/dist/schema/schema-generator.js:18:52)
      at Generator.next (<anonymous>)
      at /Users/pavel/Dev/exampleproject/node_modules/tslib/tslib.js:110:75
      at new Promise (<anonymous>)
      at Object.__awaiter (/Users/pavel/Dev/exampleproject/node_modules/tslib/tslib.js:106:16)
      at Function.generateFromMetadata (/Users/pavel/Dev/exampleproject/node_modules/type-graphql/dist/schema/schema-generator.js:15:24)
      at /Users/pavel/Dev/exampleproject/node_modules/type-graphql/dist/utils/buildSchema.js:11:65
      at Generator.next (<anonymous>)
    message:
     'Input Object type CatInputType must define one or more fields.' } ]
(node:72485) UnhandledPromiseRejectionWarning: Error: Generating schema error
    at Function.<anonymous> (/Users/pavel/Dev/exampleproject/node_modules/type-graphql/dist/schema/schema-generator.js:20:27)
    at Generator.next (<anonymous>)
    at fulfilled (/Users/pavel/Dev/exampleproject/node_modules/tslib/tslib.js:107:62)
    at processTicksAndRejections (internal/process/next_tick.js:81:5)
(node:72485) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:72485) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

[{GraphQLError:输入对象类型CatInputType必须定义一个或多个字段。
在SchemaValidationContext.reportError（/Users/pavel/Dev/exampleproject/node_modules/graphql/type/validate.js:90:19）
在validateInputFields（/Users/pavel/Dev/exampleproject/node_modules/graphql/type/validate.js:432:13）
在validateType（/Users/pavel/Dev/exampleproject/node_modules/graphql/type/validate.js:240:7）
在validateSchema（/Users/pavel/Dev/exampleproject/node_modules/graphql/type/validate.js:54:3）
在graphqlImpl（/Users/pavel/Dev/exampleproject/node_modules/graphql/graphql.js:79:62）
at/Users/pavel/Dev/exampleproject/node_modules/graphql/graphql.js:28:59
在新的承诺（）
在Object.graphql（/Users/pavel/Dev/exampleproject/node_modules/graphql/graphql.js:26:10）
at函数。（/Users/pavel/Dev/exampleproject/node_modules/type graphql/dist/schema/schema generator.js:18:52）
在Generator.next（）处
at/Users/pavel/Dev/exampleproject/node_modules/tslib/tslib.js:110:75
在新的承诺（）
at Object.u waiter（/Users/pavel/Dev/exampleproject/node_modules/tslib/tslib.js:106:16）
位于Function.generateFromMetadata（/Users/pavel/Dev/exampleproject/node_modules/type graphql/dist/schema/schema generator.js:15:24）
at/Users/pavel/Dev/exampleproject/node_modules/type graphql/dist/utils/buildSchema.js:11:65
在Generator.next（）处
信息：
“输入对象类型CatInputType必须定义一个或多个字段。”}]
（节点：72485）未处理的PromisejectionWarning:错误：生成架构错误
在功能上。（/Users/pavel/Dev/exampleproject/node_modules/type graphql/dist/schema/schema generator.js:20:27）
在Generator.next（）处
完成时（/Users/pavel/Dev/exampleproject/node_modules/tslib/tslib.js:107:62）
在处理和拒绝时（内部/处理/下一个_tick.js:81:5）
（节点：72485）未处理的Promisejection警告：未处理的承诺拒绝。此错误源于在没有catch块的异步函数中抛出，或者拒绝未使用.catch（）处理的承诺。（拒绝id:1）
（节点：72485）[DEP0018]弃用警告：未处理的承诺拒绝被弃用。将来，未处理的承诺拒绝将使用非零退出代码终止Node.js进程。

---

当在

CatInputType

中时，描述了

BaseCat

中的所有字段，所有字段均按预期工作。我做错了什么？

默认情况下，TypeGraphQL不会从父类继承所有未使用

@InputType

或

@ObjectType

修饰的

@Field

字段，因为不应混合这些类型，因为联合和接口等都是无效的GraphQL输入类型

因此，如果您确定没有违反此规则，只需将两个装饰器放在类的顶部：

@ObjectType({ isAbstract: true })
@InputType({ isAbstract: true })
class CatBase {
  @Field()
  name: string;

  @Field({ nullable: true })
  age?: number;
}