Question

我正在使用风帆v0.10。我在/service/Utility.js中创建了一个服务，我想在/picies/addWhere.js中使用Ulitity.js方法我想知道是否可以在政策中使用服务。

我的Utility.js看起来像是：

var util = require('util'),
      _ = require('lodash');

module.exports = {

  getRequestAction: function (req) {
    if (req.options.action) return req.options.action;

    var controller = req.options.controller || req.options.model;

    var baseRoute = sails.config.blueprints.prefix + controller;
    var requestRoute = req.route.method + ' ' + req.route.path;

    var Model = sails.models[controller];

    if (req.options.shortcuts && Model) {
      var shortcutRoutes = {
        '/%s/find/:id?': 'find',
        '/%s/create': 'create',
        '/%s/update/:id?': 'update',
        '/%s/destroy/:id?': 'destroy'
      };

      var shortcutAction = _.findWhere(shortcutRoutes, function(blueprint, pattern){
        var shortcutRoute = util.format(pattern, baseRoute);
        return req.route.path === shortcutRoute;
      });

      if (shortcutAction) return shortcutAction;
    }

    if (req.options.rest && Model) {
      var restRoutes = {
        'get /%s/:id?': 'find',
        'post /%s': 'create',
        'put /%s/:id?': 'update',
        'delete /%s/:id?': 'destroy'
      };

      var restAction =_.findWhere(restRoutes, function(blueprint, pattern){
        var restRoute = util.format(pattern, baseRoute);
        return requestRoute === restRoute;
      });

      if (restAction) return restAction;

      var associationActions = _.compact(_.map(req.options.associations, function(association){
        var alias = association.alias;

        var associationRoutes = {
          'get /%s/:parentid/%s/:id?': 'populate',
          'post /%s/:parentid/%s': 'add',
          'delete /%s/:parentid/%s': 'remove'
        };

        return _.findWhere(associationRoutes, function(blueprint, pattern){
          var associationRoute = util.format(pattern, baseRoute, alias);
          return requestRoute === associationRoute;
        });
      }));

      if (associationActions.length > 0) return associationActions[0];
    }
  }
};

addWhere.js就像：

 var Utility=require('util');
  module.exports = function(req, res, next) {
      var action = Utility.getRequestAction(req);
      console.log("Request action is", action);
    }
      next();
  };

但是当我尝试执行它时，返回错误：

error: Sending 500 ("Server Error") response: 
 TypeError: Object #<Object> has no method 'getRequestAction'
    at module.exports (/var/www/sails/LayupSailsServer/api/policies/addWhere.js:7:26)
    at routeTargetFnWrapper (/var/www/sails/LayupSailsServer/node_modules/sails/lib/router/bind.js:178:5)
    at callbacks (/var/www/sails/LayupSailsServer/node_modules/sails/node_modules/express/lib/router/index.js:164:37)
    at param (/var/www/sails/LayupSailsServer/node_modules/sails/node_modules/express/lib/router/index.js:138:11)
    at pass (/var/www/sails/LayupSailsServer/node_modules/sails/node_modules/express/lib/router/index.js:145:5)
    at nextRoute (/var/www/sails/LayupSailsServer/node_modules/sails/node_modules/express/lib/router/index.js:100:7)
    at callbacks (/var/www/sails/LayupSailsServer/node_modules/sails/node_modules/express/lib/router/index.js:167:11)
    at /var/www/sails/LayupSailsServer/node_modules/sails/lib/router/bind.js:186:7
    at module.exports (/var/www/sails/LayupSailsServer/api/policies/isAuthorized.js:6:5)
    at routeTargetFnWrapper (/var/www/sails/LayupSailsServer/node_modules/sails/lib/router/bind.js:178:5) [TypeError: Object #<Object> has no method 'getRequestAction']

我想知道自己做错了什么。

Answer 1

试试这个：

var Utility = require('../services/util');
module.exports = function(req, res, next) {
  var action = Utility.getRequestAction(req);
  console.log("Request action is", action);
}
next();
};

Answer 2

这项服务看起来很好，即使在我看来还有很多重新发明轮子的事情。

错误在于：

var Utility=require('util');

你基本上用这行代码用util对象覆盖服务。为了清晰的代码，我建议使用服务后缀命名策略。因此，在这种情况下utilityService.js代替Utility.js 然后你在代码中的任何地方utilityService.getRequestAction()做，你不需要任何东西。

但我对帆很新，所以可能会有一些我看不到的东西。

编辑：当前操作和控制器名称应该可以通过req.options访问... sails.log.debug（JSON.stringify（req.options））;

Answer 3

addWhere.js

要调用的ServiceFileName.action

module.exports = function(req, res, next) {
  var action = Utility.getRequestAction(req);
  console.log("Request action is", action);
};

Utility.js （因为lodash是帆中的全球对象）

var util = require('util');

module.exports = {

  getRequestAction: function (req) {

Sails js：我如何在策略中使用服务方法

3 个答案: