首先,我们需要确定变异错误的原因。一种常见的原因是在数据库上进行的变异。然后,我们需要检查我们的服务器代码和模式定义,以确保它们正确匹配。如果还出现问题,我们可以尝试使用Apollo服务器的调试工具进行诊断。例如,我们可以在服务器端启用日志记录,以便在出现错误时查看更多详细信息。以下是一些处理GraphQL变异错误的示例代码:
const { ApolloServer, gql } = require('apollo-server');
const { makeExecutableSchema } = require('@graphql-tools/schema');
const { applyMiddleware } = require('graphql-middleware');
const { makePrismaSchema } = require('@prisma/sdk');
const prisma = new PrismaClient();
const typeDefs = gql`
type User {
id: ID!
firstName: String!
lastName: String!
email: String!
age: Int
posts: [Post!]!
}
type Post {
id: ID!
title: String!
content: String!
published: Boolean!
author: User
}
type Query {
users: [User!]!
posts: [Post!]!
user(id: ID!): User!
post(id: ID!): Post!
}
type Mutation {
createUser(data: CreateUserInput!): User!
updateUser(id: ID!, data: UpdateUserInput!): User!
deleteUser(id: ID!): User!
createPost(data: CreatePostInput!): Post!
updatePost(id: ID!, data: UpdatePostInput!): Post!
deletePost(id: ID!): Post!
}
input CreateUserInput {
firstName: String!
lastName: String!
email: String!
age: Int
}
input UpdateUserInput {
firstName: String
lastName: String
email: String
age: Int
}
input CreatePostInput {
title: String!
content: String!
published: Boolean!
authorId: ID!
}
input UpdatePostInput {
title: String
content: String