Question

我正在尝试将指令添加到我们的GraphQL API中，并遵循此示例https://www.apollographql.com/docs/apollo-server/features/creating-directives.html#Uppercasing-strings，但是，我不断收到服务器错误（没有该指令，服务器就可以工作！）：</ p>

** Uncaught Error: Duplicate schema type name Integer **
    at home/node_modules/apollo-server-core/node_modules/graphql-tools/dist/schemaVisitor.js:243:27
    at home/node_modules/apollo-server-core/node_modules/graphql-tools/dist/schemaVisitor.js:527:9
    at Array.forEach (<anonymous>)
    at each (home/node_modules/apollo-server-core/node_modules/graphql-tools/dist/schemaVisitor.js:526:32)
    at heal (home/node_modules/apollo-server-core/node_modules/graphql-tools/dist/schemaVisitor.js:234:13)
    at healSchema (home/node_modules/apollo-server-core/node_modules/graphql-tools/dist/schemaVisitor.js:225:5)
    at Function.SchemaDirectiveVisitor.visitSchemaDirectives (home/node_modules/apollo-server-core/node_modules/graphql-tools/dist/schemaVisitor.js:474:9)
    at Object.makeExecutableSchema (home/node_modules/apollo-server-core/node_modules/graphql-tools/dist/makeExecutableSchema.js:54:48)
    at new ApolloServerBase (home/node_modules/apollo-server-core/dist/ApolloServer.js:142:43)
    at new ApolloServer (home/node_modules/apollo-server-express/dist/ApolloServer.js:44:1)

模式非常大，因此无法在此处发布，但是，模式类型'Integer'尚未重复。我遵循了多种不同的指南，但一直遇到此错误。

我们正在使用Apollo Server 2.1.0和GraphQL 14.0.2

服务器设置：

class error_extension extends GraphQLExtension {
  willSendResponse(o) {
    const { context, graphqlResponse } = o;

    context.add_additional_error_reporting(graphqlResponse.errors);

    return o;
  }
}


// Create (or import) a custom schema directive
class UpperCaseDirective extends SchemaDirectiveVisitor {
  visitFieldDefinition(field) {
    const { resolve = defaultFieldResolver } = field;
    field.resolve = async function (...args) {
      const result = await resolve.apply(this, args);
      if (typeof result === 'string') {
        return result.toUpperCase();
      }
      return result;
    };
  }
}


// Server settings
const server = new ApolloServer({
  typeDefs,
  resolvers,
  schemaDirectives: {
    upper: UpperCaseDirective,
  },
  context: async ({ req, res }) => {
    // some auth logic here - removed for the purpose of this

    return {
      add_additional_error_reporting(errors) {
        if (!errors) return;

        errors = errors.map(item => {

          // add request data to the returned error
          if (`extensions` in item && item.extensions !== undefined)
            item.extensions.request_details = req.body;

          return item;
        });

        return errors;
      },
      req,
      res
    };
  },
  extensions: [() => new error_extension()],
  validationRules: [

    depthLimit(5),

    costAnalysis({ // GraphQL Query Cost 
      maximumCost: 100, // maximum cost of a single  query
      defaultCost: 1, // default cost of a field
      onComplete: (async request_cost => {
        // Callback function to retrieve the determined query cost. It will be invoked whether the query is rejected or not. 
        // This can be used for logging or to implement rate limiting (for example, to store the cost by session and define a max cost the user can have in a specific time).
        try { 
          cost_data = await helper.run_connector_cost_logic(request_cost);
        } catch (err) { throw err; }
      }),
      createError: (maximumCost, cost) => {
        // Function to create a custom error
        throw new ApolloError(`The maximum cost per request is ${maximumCost} however this request is greater than this limit, with a cost of ${cost}.`, `EXCEEDED_MAX_REQ_COST`);
      }
    })

  ],
  formatError: err => { 
    console.error(err); // eslint-disable-line
    return err; 
  },
  formatResponse: res => {
    res.extensions.cost = cost_data;

    // wipe the cost data for the next request
    cost_data = {};

    return res;
  },
  introspection: false,
  tracing: false,
  debug: false
});

任何帮助将不胜感激！

Answer 1

这是使用JS逻辑生成的Scalars的一个问题，但是有一条语句存在缺陷，导致多个具有相同名称值的Scalars。

对于其他任何人，如@Daniel Rearden在评论中所说：“错误来自graphql-tools。除非您包含指令，否则不会调用该验证逻辑”，因此，为什么错误只是在这里出现，即与指令无关。

GraphQL / Apollo服务器指令导致架构错误

1 个答案: