如何将函数的默认值添加到 Sailsjs 中的模型 [英] How to add a default value from a function to the model in Sailsjs

问题描述

这是我的模型

module.exports = {

    attributes: {

        ip: {
            type: 'ip'
        },
        useragent: {
            type: 'text'
        },
        type: 'int'
        }
    }
};

所以我需要的是在创建记录之前我需要从传入的请求中自动填充 ip 和用户代理

So what I need is before the record is created I need the ip and the useragent to be filled automatically from the request that comes in

这可行吗?

谢谢

推荐答案

您可以通过 Sails policy 通过在 req.options 上设置一些属性.如果您有一个 User 模型并且正在使用蓝图 create 路由，那么在您的 config/policies 中，您将拥有:

You can do this via a Sails policy by setting some properties on req.options. If you have a User model and are using the blueprint create route, then in your config/policies you'd have:

UserController: {
  create: 'setValues'
}

在 api/policies/setValues.js 中:

module.exports = function(req, res, next) {

  req.options.values = req.options.values || {};
  req.options.values.ip = <SET IP>;
  req.options.values.agent = <SET USER AGENT>;
  return next();

};

我不记得获取用户 IP 的首选方式，但是 这个问题 看起来很有希望.对于用户代理，您可以尝试 req.headers['user-agent'].

I don't remember the preferred way to get user IP, but this question looks promising. For user agent you can try req.headers['user-agent'].

如果您使用的是自定义控制器操作而不是蓝图，这仍然可以正常工作，您只需要将随请求传递的值与 req.options.values 合并.

If you're using a custom controller action rather than the blueprints, this will still work fine, you'll just need to merge the values passed with the request with req.options.values.

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