阿波罗联邦打字稿解析器参数

Question

您好，我有一个与 apollo federation 有关的问题，我一直在使用 apollo server 来试验 graphql 和 typescript 我一切正常，但我想搬到 apollo federation，我不得不将架构构建方法更改为 buildSubgraphSchema，我是我的解析器的类型定义有些问题。

这是我的 graphql 架构：

import { gql } from 'apollo-server-koa';

const typeDefs = gql` 
type State {
  stateId: Int
  name: String
}

extend type Query {
  state(stateId: Int!): State
  stateList: [State]
}

extend type Mutation {
  createState(
    name: String!
  ) : State

  updateState(
    stateId: Int!
    name: String!
  ) : State

  deleteState(
    stateId: Int!
  ) : State
}
`;

export default typeDefs;

这是我在阿波罗服务器中的解析器：

import { PrismaClient } from '@prisma/client';
import { State, UpdateStateInput, DeleteStateInput } from '../types/state';

const prisma = new PrismaClient();

const stateResolver = {
  Query: {
    state: (_params: any, args: { stateId: number }) => {
      return prisma.state.findUnique({
        where: { stateId: args.stateId || undefined },
      });
    },
    stateList: () => {
      return prisma.state.findMany();
    },
  },
  Mutation: {
    createState: (_parent: any, args: State) => {
      return prisma.state.create({ data: { name: args.name } });
    },
    updateState: (_parent: any, args: UpdateStateInput) => {
      const { stateId, ...data } = args;
      return prisma.state.update({ where: { stateId }, data });
    },
    deleteState: (_parent: any, args: DeleteStateInput) => {
      return prisma.state.delete({ where: { stateId: args.stateId } });
    },
  },
  // Relation resolvers
  State: {
    notary: (parent: any) => {
      return prisma.notary.findMany({ where: { stateId: parent?.stateId } });
    },
  },
};

export default stateResolver;

当我将该解析器传递给 buildSubgraphSchema 时，打字稿显示此错误：

Type '{ Query: { state: (_params: any, args: {    stateId: number;}) => Prisma.Prisma__StateClient<State | null>; stateList: () => PrismaPromise<State[]>; }; Mutation: { createState: (_parent: any, args: State) => Prisma.Prisma__StateClient<...>; updateState: (_parent: any, args: UpdateStateInput) => Prisma.Prisma__StateC...' is not assignable to type 'GraphQLResolverMap<any>'.
  Property 'Query' is incompatible with index signature.
    Type '{ state: (_params: any, args: {    stateId: number;}) => Prisma.Prisma__StateClient<State | null>; stateList: () => PrismaPromise<State[]>; }' is not assignable to type 'GraphQLScalarType | { [enumValue: string]: string | number; } | { [fieldName: string]: GraphQLFieldResolver<any, any, { [argName: string]: any; }> | { ...; }; }'.
      Type '{ state: (_params: any, args: {    stateId: number;}) => Prisma.Prisma__StateClient<State | null>; stateList: () => PrismaPromise<State[]>; }' is not assignable to type '{ [fieldName: string]: GraphQLFieldResolver<any, any, { [argName: string]: any; }> | { requires?: string | undefined; resolve: GraphQLFieldResolver<any, any, { [argName: string]: any; }>; }; }'.
        Property 'state' is incompatible with index signature.
          Type '(_params: any, args: {    stateId: number;}) => Prisma.Prisma__StateClient<State | null>' is not assignable to type 'GraphQLFieldResolver<any, any, { [argName: string]: any; }> | { requires?: string | undefined; resolve: GraphQLFieldResolver<any, any, { [argName: string]: any; }>; }'.
            Type '(_params: any, args: {    stateId: number;}) => Prisma.Prisma__StateClient<State | null>' is not assignable to type 'GraphQLFieldResolver<any, any, { [argName: string]: any; }>'.
              Types of parameters 'args' and 'args' are incompatible.
                Property 'stateId' is missing in type '{ [argName: string]: any; }' but required in type '{ stateId: number; }'.

如果我在所有解析器方法上设置args: any，错误就会得到解决。考虑到它丢失了那里的类型定义，我想知道这是否是正确的方法。

谢谢。

Answer 1

我遇到了同样的问题，但我使用的是 apollo 服务器 fastify。我使用了来自 apollo-graphql 的 GraphqlResolverMap 类型。只需将此类型提供给您的解析器并指定您的上下文类型，如下所示：GraphqlResolverMap

顺便说一句，我在启动网关时遇到了问题。如果你能帮助我，我将不胜感激。 Apollo federation can't start gateway