Backbone.js。 JSONデータをローカルストレージに保存します

Question

現在、私は私が作業している私のアプリケーションのためのこのコードを持っています。私はバックボーンに問題があります。私があなたを助けてくれることを願っています。

のlocalStorage-adapter.js

app.adapters.employee = (function() { 

console.log("Loading localstorage adapter module"); 

var findById = function (id) { 

     var deferred = $.Deferred(), 
      employees = JSON.parse(window.localStorage.getItem("employees")), 
      employee = null, 
      l = employees.length; 

     for (var i = 0; i < l; i++) { 
      if (employees[i].id === id) { 
       employee = employees[i]; 
       break; 
      } 
     } 

     deferred.resolve(employee); 
     return deferred.promise(); 
    }, 

    findByName = function (searchKey) { 
     var deferred = $.Deferred(), 
      employees = JSON.parse(window.localStorage.getItem("employees")), 
      results = employees.filter(function (element) { 
       var fullName = element.firstName + " " + element.lastName; 
       return fullName.toLowerCase().indexOf(searchKey.toLowerCase()) > -1; 
      }); 
     deferred.resolve(results); 
     return deferred.promise(); 
    }, 

    findByManager = function (managerId) { 
     var deferred = $.Deferred(), 
      employees = JSON.parse(window.localStorage.getItem("employees")), 
      results = employees.filter(function (element) { 
       return managerId === element.managerId; 
      }); 
     deferred.resolve(results); 
     return deferred.promise(); 
    }; 


// Store sample data in Local Storage 
window.localStorage.setItem("employees", JSON.stringify(
    [ 
     {"id": 1, "firstName": "James", "lastName": "King", "managerId": 0, "managerName": "", "reports": 4, "title": "President and CEO", "department": "Corporate", "cellPhone": "617-000-0001", "officePhone": "781-000-0001", "email": "jking@fakemail.com", "city": "Boston, MA", "pic": "james_king.jpg", "twitterId": "@fakejking", "blog": "http://coenraets.org"}, 
     {"id": 2, "firstName": "Julie", "lastName": "Taylor", "managerId": 1, "managerName": "James King", "reports": 2, "title": "VP of Marketing", "department": "Marketing", "cellPhone": "617-000-0002", "officePhone": "781-000-0002", "email": "jtaylor@fakemail.com", "city": "Boston, MA", "pic": "julie_taylor.jpg", "twitterId": "@fakejtaylor", "blog": "http://coenraets.org"}, 
     {"id": 3, "firstName": "Eugene", "lastName": "Lee", "managerId": 1, "managerName": "James King", "reports": 0, "title": "CFO", "department": "Accounting", "cellPhone": "617-000-0003", "officePhone": "781-000-0003", "email": "elee@fakemail.com", "city": "Boston, MA", "pic": "eugene_lee.jpg", "twitterId": "@fakeelee", "blog": "http://coenraets.org"}, 
     {"id": 4, "firstName": "John", "lastName": "Williams", "managerId": 1, "managerName": "James King", "reports": 3, "title": "VP of Engineering", "department": "Engineering", "cellPhone": "617-000-0004", "officePhone": "781-000-0004", "email": "jwilliams@fakemail.com", "city": "Boston, MA", "pic": "john_williams.jpg", "twitterId": "@fakejwilliams", "blog": "http://coenraets.org"}, 
     {"id": 5, "firstName": "Ray", "lastName": "Moore", "managerId": 1, "managerName": "James King", "reports": 2, "title": "VP of Sales", "department": "Sales", "cellPhone": "617-000-0005", "officePhone": "781-000-0005", "email": "rmoore@fakemail.com", "city": "Boston, MA", "pic": "ray_moore.jpg", "twitterId": "@fakermoore", "blog": "http://coenraets.org"}, 
     {"id": 6, "firstName": "Paul", "lastName": "Jones", "managerId": 4, "managerName": "John Williams", "reports": 0, "title": "QA Manager", "department": "Engineering", "cellPhone": "617-000-0006", "officePhone": "781-000-0006", "email": "pjones@fakemail.com", "city": "Boston, MA", "pic": "paul_jones.jpg", "twitterId": "@fakepjones", "blog": "http://coenraets.org"}, 
     {"id": 7, "firstName": "Paula", "lastName": "Gates", "managerId": 4, "managerName": "John Williams", "reports": 0, "title": "Software Architect", "department": "Engineering", "cellPhone": "617-000-0007", "officePhone": "781-000-0007", "email": "pgates@fakemail.com", "city": "Boston, MA", "pic": "paula_gates.jpg", "twitterId": "@fakepgates", "blog": "http://coenraets.org"}, 
     {"id": 8, "firstName": "Lisa", "lastName": "Wong", "managerId": 2, "managerName": "Julie Taylor", "reports": 0, "title": "Marketing Manager", "department": "Marketing", "cellPhone": "617-000-0008", "officePhone": "781-000-0008", "email": "lwong@fakemail.com", "city": "Boston, MA", "pic": "lisa_wong.jpg", "twitterId": "@fakelwong", "blog": "http://coenraets.org"}, 
     {"id": 9, "firstName": "Gary", "lastName": "Donovan", "managerId": 2, "managerName": "Julie Taylor", "reports": 0, "title": "Marketing Manager", "department": "Marketing", "cellPhone": "617-000-0009", "officePhone": "781-000-0009", "email": "gdonovan@fakemail.com", "city": "Boston, MA", "pic": "gary_donovan.jpg", "twitterId": "@fakegdonovan", "blog": "http://coenraets.org"}, 
     {"id": 10, "firstName": "Kathleen", "lastName": "Byrne", "managerId": 5, "managerName": "Ray Moore", "reports": 0, "title": "Sales Representative", "department": "Sales", "cellPhone": "617-000-0010", "officePhone": "781-000-0010", "email": "kbyrne@fakemail.com", "city": "Boston, MA", "pic": "kathleen_byrne.jpg", "twitterId": "@fakekbyrne", "blog": "http://coenraets.org"}, 
     {"id": 11, "firstName": "Amy", "lastName": "Jones", "managerId": 5, "managerName": "Ray Moore", "reports": 0, "title": "Sales Representative", "department": "Sales", "cellPhone": "617-000-0011", "officePhone": "781-000-0011", "email": "ajones@fakemail.com", "city": "Boston, MA", "pic": "amy_jones.jpg", "twitterId": "@fakeajones", "blog": "http://coenraets.org"}, 
     {"id": 12, "firstName": "Steven", "lastName": "Wells", "managerId": 4, "managerName": "John Williams", "reports": 0, "title": "Software Architect", "department": "Engineering", "cellPhone": "617-000-0012", "officePhone": "781-000-0012", "email": "swells@fakemail.com", "city": "Boston, MA", "pic": "steven_wells.jpg", "twitterId": "@fakeswells", "blog": "http://coenraets.org"} 
    ] 
)); 

    // The public API 
return { 
    findById: findById, 
    findByName: findByName, 
    findByManager: findByManager 
}; 

}（））。

EmployeeModel.js

app.models.Employee = Backbone.Model.extend({ 

}); 

app.models.EmployeeCollection = Backbone.Collection.extend({ 
    model: app.models.Employee, 
url: 'http://www.bonar.si/api/restaurants', 

initialize: function(){ 
    console.log("Employees initialize"); 
}, 

parse : function(response) { 
    console.log("response", response); 
    localStorage.setItem('json', JSON.stringify(response)); 
    console.log("local storage:", localStorage.getItem('json')); 
    return response; 

}}）。

私は自分のローカルストレージにJSONデータを持っていますが、私はこのデータを扱っています。しかし、今では、JSONデータをURLからローカルストレージに1日に1回だけ保存し、ローカルストレージに保存したいと考えています。

1日に1回新鮮なデータを取得してローカルストレージに保存し、ローカルストレージからこのデータを操作するので、私が行っているすべてのことからURLからJSONをリクエストする必要はありません。

（EmployeeModel.js）私はurlからコレクションにデータを取得し、それをlocalstorageに保存しますが、今は失われています。私はeasblyバックボーンで失われる。

ありがとうございました。

Answer 1

私が正しく理解していれば、従業員のデータを1日1回リフレッシュする必要がありますか？ これは私のアプリケーションの1つです。私のアプローチは、更新タイムスタンプでlocalStorage変数を保持することでした。 refresh関数は、（onDeviceReady関数から）アプリケーションを開くたびに呼び出されます。 localStorageのリフレッシュタイムスタンプが1日より古いか、またはnullの場合、URLからデータを取得し、更新日を現在に設定します。