Question

我对node.js，sails.js和javascript一般不熟悉。我正在尝试创建一个个人网站，用于在家中进行家庭医学应用程序。

在创建此sails.js应用程序的过程中，当我尝试在多对多关联中使用addToCollection函数时，我陷入了一个问题。

这是我的代码：

// dashboard.js

module.exports = {
  attributes: {
    owner: {
      model: 'user',
      unique: true
    },
    boxs: {
      collection: 'box',
      via: 'views'
    }
  }
};

// box.js module.exports = {

  attributes: {
      x: {
        type: 'integer',
        required: true
      },
      y: {
        type: 'integer',
        required: true
      },
      moduleinfo: {
        model: 'device',
        unique: true
      },
      views: {
        collection: 'dashboard',
        via: 'boxs'
      }
  }
};

当我在代码中的某个位置（在我创建一个盒子和一个仪表板之后）尝试调用addToCollection函数时，出现错误：

Dashboard.findOne({owner: req.session.User.id}).exec(function(err, dashboard){
    await Dashboard.addToCollection(dashboard.id, 'boxs', box.id);
});

这是日志：

info: Starting app...
error: A hook (`controllers`) failed to load!
error: `include-all` attempted to `require(/home/benjamin/Documents/nodejs/automathomejs/api/controllers/DeviceController.js)`, but an error occurred:: 
Details:SyntaxError: Unexpected identifier
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:374:25)
at Object.Module._extensions..js (module.js:417:10)
at Module.load (module.js:344:32)
at Function.Module._load (module.js:301:12)
at Module.require (module.js:354:17)
at require (internal/module.js:12:17)
at /usr/local/lib/node_modules/sails/node_modules/include-all/lib/help-include-all-sync.js:271:33
at Array.forEach (native)
at _recursivelyIncludeAll (/usr/local/lib/node_modules/sails/node_modules/include-all/lib/help-include-all-sync.js:174:11)
at includeAll (/usr/local/lib/node_modules/sails/node_modules/include-all/lib/help-include-all-sync.js:292:5)
at helpBuildDictionary (/usr/local/lib/node_modules/sails/node_modules/include-all/lib/help-build-dictionary.js:43:15)
at Function.module.exports.optional (/usr/local/lib/node_modules/sails/node_modules/include-all/index.js:67:10)
at Hook.loadControllers (/usr/local/lib/node_modules/sails/lib/hooks/moduleloader/index.js:324:18)
at Hook.wrapper [as loadControllers] (/usr/local/lib/node_modules/sails/node_modules/@sailshq/lodash/lib/index.js:3250:19)
at Hook.loadAndRegisterControllers (/usr/local/lib/node_modules/sails/lib/hooks/controllers/to-load-and-register-controllers.js:33:19)
at Hook.initialize (/usr/local/lib/node_modules/sails/lib/hooks/controllers/index.js:59:12)
at Hook.wrapper [as initialize] (/usr/local/lib/node_modules/sails/node_modules/@sailshq/lodash/lib/index.js:3250:19)
at /usr/local/lib/node_modules/sails/lib/hooks/index.js:88:16
at /usr/local/lib/node_modules/sails/node_modules/async/lib/async.js:52:16
at /usr/local/lib/node_modules/sails/node_modules/async/lib/async.js:548:17
at /usr/local/lib/node_modules/sails/node_modules/async/lib/async.js:542:17

谢谢您的时间！

本杰明

Answer 1

这里有很多要拆包的东西。

首先在Sails.js中出现此错误：

error: `include-all` attempted to `require(/home/benjamin/Documents/nodejs/automathomejs/api/controllers/DeviceController.js)`, but an error occurred:: Details:SyntaxError: Unexpected identifier

通常表示您在某处有错字。

您的代码在这里：

Dashboard.findOne({owner: req.session.User.id}).exec(function(err, dashboard){
await Dashboard.addToCollection(dashboard.id, 'boxs', box.id);});

第一个.exec很旧，不应与Sails.js一起真正使用同样，您不能同时使用.exec和await。

也就是说await必须在异步函数中。

代码的组织也令人困惑。您需要先进行垂直处理，然后再进行水平处理。

以下是重新编写代码的示例：

Good

var result = await whatever();//1
var result2 = await whatever2();//2


Bad (old)

//1
  whatever((err, result)=>{
  //2
   whatever2((err, result2)=>{
    //3
    })
  });

更多信息

https://github.com/mikermcneil/parley/tree/bf09a3abee35446217e799d057505a2eaf593172#flow-control

Answer 2

await只能在异步函数中使用。因此，您可以尝试以下操作：在函数之前放aync。

Dashboard.findOne({owner: req.session.User.id}).exec(async function(err, dashboard){
await Dashboard.addToCollection(dashboard.id, 'boxs', box.id);

}）;

sails.js addToCollection意外标识符

2 个答案: