Extract expenses from emails and add to Google Sheet

工作流概述

这是一个包含6个节点的中等工作流,主要用于自动化处理各种任务。

工作流源代码

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{
  "id": 90,
  "name": "Extract expenses from emails and add to Google Sheet",
  "nodes": [
    {
      "name": "Check subject",
      "type": "n8n-nodes-base.if",
      "position": [
        800,
        300
      ],
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{$json[\"subject\"].toLowerCase()}}",
              "value2": "=/{{$json[\"subjectPatterns\"].toLowerCase()}}/",
              "operation": "regex"
            }
          ]
        },
        "combineOperation": "any"
      },
      "typeVersion": 1
    },
    {
      "name": "Setup Variables",
      "type": "n8n-nodes-base.set",
      "position": [
        620,
        300
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "subjectPatterns",
              "value": "(expenses|reciept)"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 1
    },
    {
      "name": "Check for new emails",
      "type": "n8n-nodes-base.emailReadImap",
      "position": [
        440,
        300
      ],
      "parameters": {
        "format": "resolved",
        "mailbox": "Inbox",
        "options": {
          "allowUnauthorizedCerts": true
        }
      },
      "credentials": {
        "imap": {
          "id": "24",
          "name": "GMAIL"
        }
      },
      "typeVersion": 1
    },
    {
      "name": "Read Receipts",
      "type": "n8n-nodes-base.mindee",
      "position": [
        1020,
        280
      ],
      "parameters": {
        "binaryPropertyName": "attachment_0"
      },
      "credentials": {
        "mindeeReceiptApi": {
          "id": "61",
          "name": "Mindee Receipt account"
        }
      },
      "typeVersion": 1
    },
    {
      "name": "Set column data",
      "type": "n8n-nodes-base.set",
      "position": [
        1200,
        280
      ],
      "parameters": {
        "values": {
          "string": [
            {
              "name": "Date",
              "value": "={{$json[\"date\"]}}"
            },
            {
              "name": "Description",
              "value": "={{$node[\"Check for new emails\"].json[\"subject\"].split(\"-\")[1]}}"
            },
            {
              "name": "Category",
              "value": "={{$json[\"category\"]}}"
            },
            {
              "name": "Currency",
              "value": "={{$json[\"currency\"]}}"
            },
            {
              "name": "Amount",
              "value": "={{$json[\"total\"]}}"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 1
    },
    {
      "name": "Add to Google Sheet",
      "type": "n8n-nodes-base.googleSheets",
      "position": [
        1380,
        280
      ],
      "parameters": {
        "range": "A:E",
        "options": {},
        "sheetId": "1xAtx1ORZYKu4urgqpOe3DawFjiWeOZO0VCVvOlQYnaE",
        "operation": "append",
        "authentication": "oAuth2"
      },
      "credentials": {
        "googleSheetsOAuth2Api": {
          "id": "8",
          "name": "Sheets"
        }
      },
      "typeVersion": 1
    }
  ],
  "active": false,
  "settings": {},
  "connections": {
    "Check subject": {
      "main": [
        [
          {
            "node": "Read Receipts",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Read Receipts": {
      "main": [
        [
          {
            "node": "Set column data",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Set column data": {
      "main": [
        [
          {
            "node": "Add to Google Sheet",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Setup Variables": {
      "main": [
        [
          {
            "node": "Check subject",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check for new emails": {
      "main": [
        [
          {
            "node": "Setup Variables",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}

功能特点

  • 自动检测新邮件
  • AI智能内容分析
  • 自定义分类规则
  • 批量处理能力
  • 详细的处理日志

技术分析

节点类型及作用

  • If
  • Set
  • Emailreadimap
  • Mindee
  • Googlesheets

复杂度评估

配置难度:
★★★☆☆
维护难度:
★★☆☆☆
扩展性:
★★★★☆

实施指南

前置条件

  • 有效的Gmail账户
  • n8n平台访问权限
  • Google API凭证
  • AI分类服务订阅

配置步骤

  1. 在n8n中导入工作流JSON文件
  2. 配置Gmail节点的认证信息
  3. 设置AI分类器的API密钥
  4. 自定义分类规则和标签映射
  5. 测试工作流执行
  6. 配置定时触发器(可选)

关键参数

参数名称 默认值 说明
maxEmails 50 单次处理的最大邮件数量
confidenceThreshold 0.8 分类置信度阈值
autoLabel true 是否自动添加标签

最佳实践

优化建议

  • 定期更新AI分类模型以提高准确性
  • 根据邮件量调整处理批次大小
  • 设置合理的分类置信度阈值
  • 定期清理过期的分类规则

安全注意事项

  • 妥善保管API密钥和认证信息
  • 限制工作流的访问权限
  • 定期审查处理日志
  • 启用双因素认证保护Gmail账户

性能优化

  • 使用增量处理减少重复工作
  • 缓存频繁访问的数据
  • 并行处理多个邮件分类任务
  • 监控系统资源使用情况

故障排除

常见问题

邮件未被正确分类

检查AI分类器的置信度阈值设置,适当降低阈值或更新训练数据。

Gmail认证失败

确认Google API凭证有效且具有正确的权限范围,重新进行OAuth授权。

调试技巧

  • 启用详细日志记录查看每个步骤的执行情况
  • 使用测试邮件验证分类逻辑
  • 检查网络连接和API服务状态
  • 逐步执行工作流定位问题节点

错误处理

工作流包含以下错误处理机制:

  • 网络超时自动重试(最多3次)
  • API错误记录和告警
  • 处理失败邮件的隔离机制
  • 异常情况下的回滚操作