承諾回報率從我的服務

Question

我用websql來自Web SQL

創建我的控制，我的模型，我的服務讓我的數據不確定：

服務

app.project.service('ProjectService', ['$webSql', 'config', function ($webSql, config) { 

    var db = $webSql.openDatabase('MyApp', '1.0', 'MyApp', 2 * 1024 * 1024); 

    this.getAll = function (params) { 
     var projects = []; 
     db.selectAll("projects").then(function(results) { 
      for(var i=0; i < results.rows.length; i++){ 
       projects.push(results.rows.item(i)); 
      } 
      return projects; 
     }) 
    }; 

    this.create = function (project) { 
     return db.insert('projects', project).then(function(results) { 
      console.log(results.insertId); 
     }); 
    }; 

    this.createTable = function() { 
     return db.createTable('projects', { 
      "id":{ 
       "type": "INTEGER", 
       "null": "NOT NULL", // default is "NULL" (if not defined) 
       "primary": true, // primary 
       "auto_increment": true // auto increment 
      }, 
      "created":{ 
       "type": "TIMESTAMP", 
       "null": "NOT NULL", 
       "default": "CURRENT_TIMESTAMP" // default value 
      }, 
      "name":{ 
       "type": "TEXT", 
       "null": "NOT NULL" 
      }, 
      "path": { 
       "type": "TEXT", 
       "null": "NOT NULL" 
      }, 
      "file": { 
       "type": "TEXT", 
       "null": "NOT NULL" 
      } 
     }); 
    }; 

}]); 

型號

app.project.factory('Project', function (ProjectService) { 

    var Project = function (properties) { 
     // Model 
     this.file = null; 
     this.name  = null; 
     this.path = null; 
     this.is_active = null; 

     angular.extend(this, properties); 
    }; 

    Project.prototype.setModel = function (obj) { 
     angular.extend(this, obj); 
    }; 

    // With service 
    // ------------------------------------------------------------------------------------------------------ 
    // ------------------------------------------------------------------------------------------------------ 

    Project.prototype.getAll = function() { 
     return ProjectService.getAll(); 
    }; 

    Project.prototype.create = function (project) { 
     return ProjectService.create(project); 
    }; 

    Project.prototype.createTable = function() { 
     return ProjectService.createTable(); 
    }; 

    return Project; 

}); 

控制器

app.home.controller('HomeController', ['$scope', '$http', '$webSql', 'Project', function ($scope, $http, $webSql, Project) { 

    var project = new Project(); 

    $scope.refresh = function(){ 

     new_project = {"name": 'Project1 WEB PREPROD', "path": 'project1.preprod.site.com', 'file': '/release.txt'}; 

     // project.createTable(); 

     project.create(new_project); 

     $scope.projects = project.getAll(); 

     console.log(project.getAll()); 
    }; 

    $scope.refresh(); 
}]); 

我可以CREATETABLE並創建一個新的對象（項目），但是當我執行$scope.projects = project.getAll(); 我的控制檯對數收益undefined

我在服務嘗試這個

this.getAll = function (params) { 
      var projects = []; 
      db.selectAll("projects").then(function(results) { 
       for(var i=0; i < results.rows.length; i++){ 
        projects.push(results.rows.item(i)); 
       } 
      }).then(function() { 
       return projects; 
      }) 
     }; 

但我有同樣的問題

Answer 1

你錯過了從服務返回承諾方法。基本上db.selectAll函數返回一個你沒有回來的承諾。

this.getAll = function (params) { 
    //return promise from here. 
    return db.selectAll("projects").then(function(results) { 
     for(var i=0; i < results.rows.length; i++){ 
      projects.push(results.rows.item(i)); 
     } 
     return projects; 
    }) 
}; 

和替換這樣的：

$scope.projects = project.getAll(); 

通過

project.getAll().then(function(results) { 
    $scope.projects = results; 
});