在使用applyResolversEnhanceMap时，需要确保装饰器函数在类型定义文件中被声明，并且其名称与resolver中的字段名称相同。

例如，假设我们有一个自定义装饰器函数myDecorator：

import { SchemaDirectiveVisitor } from 'graphql-tools';

export class MyDecoratorDirective extends SchemaDirectiveVisitor {
  public visitFieldDefinition(field) {
    const { resolve = defaultFieldResolver } = field;
    field.resolve = async (...args) => {
      const result = await resolve.apply(this, args);
      // some logic here
      return result;
    };
  }
}

我们在类型定义文件中使用该装饰器：

directive @myDecorator on FIELD_DEFINITION

type Query {
  hello: String @myDecorator
}

我们将该装饰器与resolver函数一起传递给applyResolversEnhanceMap：

import { applyResolversEnhanceMap } from 'type-graphql';
import { MyDecoratorDirective } from './myDecorator';

const resolvers = {
  Query: {
    hello: async (): Promise => {
      return 'world';
    },
  },
};

const resolversEnhanceMap = {
  Query: {
    hello: [MyDecoratorDirective],
  },
};

applyResolversEnhanceMap(resolvers, resolversEnhanceMap);

现在运行服务器，并查询hello字段，我们将会看到装饰器生效并执行myDecorator函数。