如何扩展node-fhir-server-core中患者配置文件中的结构定义

npm install node-fhir-server-core

const { Patient } = require('node-fhir-server-core').resources.R4;

const CustomPatient = {
  ...Patient,
  // 在这里添加自定义的扩展字段
  extension: [
    {
      url: 'http://example.com/fhir/StructureDefinition/custom-field',
      valueString: 'Custom Value'
    }
  ]
};

module.exports = CustomPatient;

const { FhirServer } = require('node-fhir-server-core');
const CustomPatient = require('./resources/CustomPatient');

const config = {
  profiles: {
    Patient: {
      service: './services/patient.service.js',
      versions: ['4_0_0'],
      custom: CustomPatient
    }
  }
};

const server = new FhirServer(config);

server.listen(3000, () => {
  console.log('FHIR server is running on port 3000');
});

const { BaseService } = require('node-fhir-server-core');

class PatientService extends BaseService {
  constructor(config) {
    super(config);
  }

  async search(args) {
    // 实现搜索逻辑
    return [];
  }

  async create(resource) {
    // 实现创建逻辑
    return resource;
  }

  async update(id, resource) {
    // 实现更新逻辑
    return resource;
  }

  async remove(id) {
    // 实现删除逻辑
    return { deleted: 1 };
  }
}

module.exports = new PatientService();

node index.js

{
  "resourceType": "Patient",
  "id": "example",
  "extension": [
    {
      "url": "http://example.com/fhir/StructureDefinition/custom-field",
      "valueString": "Custom Value"
    }
  ],
  "name": [
    {
      "use": "official",
      "family": "Doe",
      "given": [
        "John"
      ]
    }
  ]
}