// 示例：使用REST API获取关联文档
async function getRelatedDocuments(recordId, recordType) {
  const apiUrl = `https://your-crm-instance.com/api/v1/${recordType}/${recordId}/documents`;
  
  try {
    const response = await fetch(apiUrl, {
      method: 'GET',
      headers: {
        'Authorization': 'Bearer your-access-token',
        'Content-Type': 'application/json'
      }
    });
    
    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }
    
    const data = await response.json();
    return data.documents;
  } catch (error) {
    console.error('Error fetching related documents:', error);
    return [];
  }
}

// 使用示例
const customerDocuments = await getRelatedDocuments('12345', 'customers');

-- SQL示例（如果直接查询数据库）
SELECT d.* 
FROM documents d
JOIN record_documents rd ON d.id = rd.document_id
WHERE rd.record_id = '12345' AND rd.record_type = 'customer';

# GraphQL示例
query GetCustomerDocuments($customerId: ID!) {
  customer(id: $customerId) {
    id
    name
    documents {
      id
      title
      fileType
      createdAt
      downloadUrl
    }
  }
}

// 分页示例
const apiUrl = `https://your-crm-instance.com/api/v1/customers/12345/documents?page=1&limit=50`;