聚合函数在页面刷新时重复 ng-repeat 中的项目。需要弄清楚如何停止重复。 Angularjs Mongodb 猫鼬
Aggregate function duplicates items in ng-repeat on page refresh. Need to figure out how to stop the duplication. Angularjs Mongodb mongoose
我在集合中有一些项目 运行 通过此聚合找到具有平均评级的项目，并在它们尚未被评论/评级时找到它们。
它有效，但现在每次我刷新页面时，它都会在 bourbon 集合中的每个项目的 ng-repeat 中重复显示。 bourbon 系列中的实际物品数量没有变化。我该如何阻止呢？
服务器端：
波旁模式：
'use strict';
var mongoose = require('mongoose'),
BourbonSchema = null;
module.exports = mongoose.model('Bourbon', {
name: {type: String, required: true},
blog: {type: String, required: true},
photo: {type: String, required: true, default:'http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg'},
location: {type: String, required: true},
distillery: {type: String, required: true},
comments: [{type: mongoose.Schema.ObjectId, ref: 'Comments'}],
rating : {type: Number}
});
var Bourbon = mongoose.model('Bourbon', BourbonSchema);
module.exports = Bourbon;
comment/rating 架构：
'use strict';
var mongoose = require('mongoose');
module.exports = mongoose.model('Comment', {
bourbonId: {type: mongoose.Schema.ObjectId, ref: 'Bourbon'},
userId: {type: mongoose.Schema.ObjectId, ref: 'User'},
text: {type: String, required: true},
createdAt: {type: Date, required: true, default: Date.now},
rating : {type: Number, required: true},
votes: {type: Number, default: 0}
});
聚合函数：
'use strict';
var Bourbon = require('../../../models/bourbon'),
Comment = require('../../../models/comment'),
DataStore = require('nedb'),
db = new DataStore(),
async = require('async');
module.exports = {
description: 'Get Bourbons',
notes: 'Get Bourbons',
tags: ['bourbons'],
handler: function(request, reply){
async.series(
[
function(callback){
Bourbon.find({},function(err,results){
//if (err) callback(err);
async.eachLimit(results,10,function(result,callback){
var plain = result.toObject();
plain.bourbonId = plain._id.toString();
plain.avgRating = 0;
delete plain._id;
db.insert(plain,callback);
},callback);
});
},
function(callback){
Comment.aggregate(
[
{$group:{
_id: '$bourbonId',
avgRating:{$avg:'$rating'}
}}
],
function(err,results){
async.eachLimit(results,10,function(result,callback){
db.update(
{bourbonId: result._id.toString()},
{$set: {avgRating: result.avgRating}},
callback
);
},callback);
}
);
}
],
function(err){
//if (err) callback(err);
db.find({}, {_id: 0}, function(err, bourbons){
console.log('DOOOOCS', bourbons);
reply ({bourbons:bourbons});
});
});
}
};
客户端
factory:
(function(){
'use strict';
angular.module('hapi-auth')
.factory('Bourbon', ['$http', function($http){
function create(bourbon){
return $http.post('/admin', bourbon);
}
function all(){
return $http.get('/admin');
}
return {create:create, all:all};
}]);
})();
控制器：
(function(){
'use strict';
angular.module('hapi-auth')
.controller('AdminCtrl', ['$scope', 'Bourbon', function($scope, Bourbon){
//$scope.blog.photo = [];
$scope.bourbon = {};
$scope.bourbons = [];
Bourbon.all().then(function(res){
$scope.bourbons = res.data.bourbons;
console.log(res.data.bourbons);
});
$scope.createBourbon = function(bourbon){
console.log('BOURBB', bourbon);
Bourbon.create(bourbon).then(function(res){
console.log('bourboonnnn', res.data);
$scope.bourbons.push(res.data);
});
};
}]);
})();
翡翠：
.row
.small-4.columns
.small-4.columns
.review
.insertContainer(ng-repeat='bourbon in bourbons')
.adminName Name: {{bourbon.name}}
img.bourbonImg(src='{{bourbon.photo}}')
.adminBlog {{bourbon.blog.slice(0,200)}} ...
.small-4.columns
尝试在页面刷新时停止重复波旁威士忌集合中的项目....
不确定我是否需要在这里实施某种替换方法..现在有点卡住..
这是控制器/聚合函数中的控制台日志returns：
DOOOOCS [ { name: 'woodford reserve',
location: 'kentucky',
distillery: 'woodford',
blog: 'fjkd;asdljfkld;ksdfj',
__v: 0,
comments: [],
photo: 'http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg',
bourbonId: '54c2aa5556267e0000b5618c',
avgRating: 0 },
{ name: 'woodford reserve',
location: 'kentucky',
distillery: 'woodford',
blog: 'fjkd;asdljfkld;ksdfj',
__v: 0,
comments: [],
photo: 'http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg',
bourbonId: '54c2aa5556267e0000b5618c',
avgRating: 0 } ]
每当此函数为 运行... 时，它似乎都会复制 Bourbons 集合中的每个项目，它 运行 在页面刷新时作为 Bourbon.all 在 angular 控制器。
这是该系列中的波本威士忌，在它 运行 之前通过聚合：
{
"_id" : ObjectId("54c2aa5556267e0000b5618c"),
"name" : "woodford reserve",
"location" : "kentucky",
"distillery" : "woodford",
"blog" : "fjkd;asdljfkld;ksdfj",
"comments" : [],
"photo" : "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg",
"__v" : 0
}
更新了 jade w/ track by:
.row
.small-4.columns
.small-4.columns
.review
.insertContainer(ng-repeat='bourbon in bourbons | unique: bourbon.bourbonId | filter: query')
.adminName Name: {{bourbon.name}}
img.bourbonImg(src='{{bourbon.photo}}')
.adminBlog {{bourbon.blog.slice(0,200)}} ...
.small-4.columns
这允许项目在第一次加载时显示，但在任何刷新/重新加载时，我现在收到此错误：
Error: [ngRepeat:dupes] Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys. Repeater: bourbon in bourbons track by bourbon.bourbonId | filter:query, Duplicate key: 54c2aa5556267e0000b5618c, Duplicate value: {"name":"woodford reserve","location":"kentucky","distillery":"woodford","blog":"fjkd;asdljfkld;ksdfj","__v":0,"comments":[],"photo":"http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg","bourbonId":"54c2aa5556267e0000b5618c","avgRating":0}
http://errors.angularjs.org/1.3.8/ngRepeat/dupes?p0=bourbon%20in%20bourbons…C%22bourbonId%22%3A%2254c2aa5556267e0000b5618c%22%2C%22avgRating%22%3A0%7D
at http://localhost:7070/vendor/angular/angular.js:63:12
at ngRepeatAction (http://localhost:7070/vendor/angular/angular.js:24483:21)
at Object.$watchCollectionAction [as fn] (http://localhost:7070/vendor/angular/angular.js:14092:13)
at Scope.$digest (http://localhost:7070/vendor/angular/angular.js:14225:29)
at Scope.$apply (http://localhost:7070/vendor/angular/angular.js:14488:24)
at done (http://localhost:7070/vendor/angular/angular.js:9646:47)
at completeRequest (http://localhost:7070/vendor/angular/angular.js:9836:7)
at XMLHttpRequest.requestLoaded (http://localhost:7070/vendor/angular/angular.js:9777:9)
这些是在浏览器控制台中返回的 bourbon 项目。它们都具有相同的 bourbonId，从索引 0 开始。唯一过滤器现在返回 2 个 bourbon 对象（原始对象和一个重复对象？）而不是所有对象...：
[对象，对象，对象，对象，对象]0：对象$$hashKey："object:6"v：0avgRating：4blog："fjkd;asdljfkld;ksdfj"bourbonId：“54c2aa5556267e0000b5618c"comments: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"__proto: Object1: Object__v: 0avgRating: 4blog: "fjkd;asdljfkld;ksdfj"bourbonId: "54c2aa5556267e0000b5618c"comments: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"proto: Object2: Object$$hashKey: "object:7"v: 0avgRating: 0blog: "fjkd;asdljfkld;ksdfj"bourbonId: "54c2aa5556267e0000b5618c"comments: Array[0]length: 0__proto: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"proto: Object3: Object__v: 0avgRating: 0blog: "fjkd;asdljfkld;ksdfj"bourbonId: "54c2aa5556267e0000b5618c"comments: Array[0]length: 0__proto__: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"proto: Object4: Object__v: 0avgRating: 0blog: "fjkd;asdljfkld;ksdfj"bourbonId: "54c2aa5556267e0000b5618c"comments: Array[0]length: 0__proto__: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"proto: Objectlength: 5__proto__: Array[ 0]
我想我已经将其缩小为服务器端的问题，在上面列出的控制器/聚合中。我需要找到一种方法来替换更新的文档，而不是每次在客户端/浏览器上调用 Bourbon.all / 运行 时都创建一个新文档......现在尝试解决它。任何提示，非常感谢。
这似乎是服务器端的问题，通过 $index 添加轨道将解决该问题。
ng-repeat='bourbon in bourbons track by $index
但问题是，它会显示重复的记录。
最好使用 AngularUI angular.unique filter
首先从 link 添加 JS，然后在应用依赖项中添加 'ui.filters' 模块。
ng-repeat='bourbon in bourbons | unique:'bourbonId'
希望这能解决您的问题。
谢谢。
这似乎只是一个过于字面的例子。您最终会在每个请求上得到重复的输出，因为这就是结果来自的商店的范围。
所以不是这个：
'use strict';
var Bourbon = require('../../../models/bourbon'),
Comment = require('../../../models/comment'),
DataStore = require('nedb'),
db = new DataStore(), // <-- globally scoped in the module :(
async = require('async');
module.exports = {
description: 'Get Bourbons',
notes: 'Get Bourbons',
tags: ['bourbons'],
handler: function(request, reply){
async.series(
[
function(callback){
最好这样做：
'use strict';
var Bourbon = require('../../../models/bourbon'),
Comment = require('../../../models/comment'),
DataStore = require('nedb'),
async = require('async');
module.exports = {
description: 'Get Bourbons',
notes: 'Get Bourbons',
tags: ['bourbons'],
handler: function(request, reply){
db = new DataStore(); // <--- Init store within request scope :)
async.series(
[
function(callback){
我在集合中有一些项目 运行 通过此聚合找到具有平均评级的项目，并在它们尚未被评论/评级时找到它们。
它有效，但现在每次我刷新页面时，它都会在 bourbon 集合中的每个项目的 ng-repeat 中重复显示。 bourbon 系列中的实际物品数量没有变化。我该如何阻止呢？ 服务器端： 波旁模式：
'use strict';
var mongoose = require('mongoose'),
BourbonSchema = null;
module.exports = mongoose.model('Bourbon', {
name: {type: String, required: true},
blog: {type: String, required: true},
photo: {type: String, required: true, default:'http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg'},
location: {type: String, required: true},
distillery: {type: String, required: true},
comments: [{type: mongoose.Schema.ObjectId, ref: 'Comments'}],
rating : {type: Number}
});
var Bourbon = mongoose.model('Bourbon', BourbonSchema);
module.exports = Bourbon;
comment/rating 架构：
'use strict';
var mongoose = require('mongoose');
module.exports = mongoose.model('Comment', {
bourbonId: {type: mongoose.Schema.ObjectId, ref: 'Bourbon'},
userId: {type: mongoose.Schema.ObjectId, ref: 'User'},
text: {type: String, required: true},
createdAt: {type: Date, required: true, default: Date.now},
rating : {type: Number, required: true},
votes: {type: Number, default: 0}
});
聚合函数：
'use strict';
var Bourbon = require('../../../models/bourbon'),
Comment = require('../../../models/comment'),
DataStore = require('nedb'),
db = new DataStore(),
async = require('async');
module.exports = {
description: 'Get Bourbons',
notes: 'Get Bourbons',
tags: ['bourbons'],
handler: function(request, reply){
async.series(
[
function(callback){
Bourbon.find({},function(err,results){
//if (err) callback(err);
async.eachLimit(results,10,function(result,callback){
var plain = result.toObject();
plain.bourbonId = plain._id.toString();
plain.avgRating = 0;
delete plain._id;
db.insert(plain,callback);
},callback);
});
},
function(callback){
Comment.aggregate(
[
{$group:{
_id: '$bourbonId',
avgRating:{$avg:'$rating'}
}}
],
function(err,results){
async.eachLimit(results,10,function(result,callback){
db.update(
{bourbonId: result._id.toString()},
{$set: {avgRating: result.avgRating}},
callback
);
},callback);
}
);
}
],
function(err){
//if (err) callback(err);
db.find({}, {_id: 0}, function(err, bourbons){
console.log('DOOOOCS', bourbons);
reply ({bourbons:bourbons});
});
});
}
};
客户端
factory:
(function(){
'use strict';
angular.module('hapi-auth')
.factory('Bourbon', ['$http', function($http){
function create(bourbon){
return $http.post('/admin', bourbon);
}
function all(){
return $http.get('/admin');
}
return {create:create, all:all};
}]);
})();
控制器：
(function(){
'use strict';
angular.module('hapi-auth')
.controller('AdminCtrl', ['$scope', 'Bourbon', function($scope, Bourbon){
//$scope.blog.photo = [];
$scope.bourbon = {};
$scope.bourbons = [];
Bourbon.all().then(function(res){
$scope.bourbons = res.data.bourbons;
console.log(res.data.bourbons);
});
$scope.createBourbon = function(bourbon){
console.log('BOURBB', bourbon);
Bourbon.create(bourbon).then(function(res){
console.log('bourboonnnn', res.data);
$scope.bourbons.push(res.data);
});
};
}]);
})();
翡翠：
.row
.small-4.columns
.small-4.columns
.review
.insertContainer(ng-repeat='bourbon in bourbons')
.adminName Name: {{bourbon.name}}
img.bourbonImg(src='{{bourbon.photo}}')
.adminBlog {{bourbon.blog.slice(0,200)}} ...
.small-4.columns
尝试在页面刷新时停止重复波旁威士忌集合中的项目.... 不确定我是否需要在这里实施某种替换方法..现在有点卡住..
这是控制器/聚合函数中的控制台日志returns：
DOOOOCS [ { name: 'woodford reserve',
location: 'kentucky',
distillery: 'woodford',
blog: 'fjkd;asdljfkld;ksdfj',
__v: 0,
comments: [],
photo: 'http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg',
bourbonId: '54c2aa5556267e0000b5618c',
avgRating: 0 },
{ name: 'woodford reserve',
location: 'kentucky',
distillery: 'woodford',
blog: 'fjkd;asdljfkld;ksdfj',
__v: 0,
comments: [],
photo: 'http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg',
bourbonId: '54c2aa5556267e0000b5618c',
avgRating: 0 } ]
每当此函数为 运行... 时，它似乎都会复制 Bourbons 集合中的每个项目，它 运行 在页面刷新时作为 Bourbon.all 在 angular 控制器。
这是该系列中的波本威士忌，在它 运行 之前通过聚合：
{
"_id" : ObjectId("54c2aa5556267e0000b5618c"),
"name" : "woodford reserve",
"location" : "kentucky",
"distillery" : "woodford",
"blog" : "fjkd;asdljfkld;ksdfj",
"comments" : [],
"photo" : "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg",
"__v" : 0
}
更新了 jade w/ track by:
.row
.small-4.columns
.small-4.columns
.review
.insertContainer(ng-repeat='bourbon in bourbons | unique: bourbon.bourbonId | filter: query')
.adminName Name: {{bourbon.name}}
img.bourbonImg(src='{{bourbon.photo}}')
.adminBlog {{bourbon.blog.slice(0,200)}} ...
.small-4.columns
这允许项目在第一次加载时显示，但在任何刷新/重新加载时，我现在收到此错误：
Error: [ngRepeat:dupes] Duplicates in a repeater are not allowed. Use 'track by' expression to specify unique keys. Repeater: bourbon in bourbons track by bourbon.bourbonId | filter:query, Duplicate key: 54c2aa5556267e0000b5618c, Duplicate value: {"name":"woodford reserve","location":"kentucky","distillery":"woodford","blog":"fjkd;asdljfkld;ksdfj","__v":0,"comments":[],"photo":"http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg","bourbonId":"54c2aa5556267e0000b5618c","avgRating":0}
http://errors.angularjs.org/1.3.8/ngRepeat/dupes?p0=bourbon%20in%20bourbons…C%22bourbonId%22%3A%2254c2aa5556267e0000b5618c%22%2C%22avgRating%22%3A0%7D
at http://localhost:7070/vendor/angular/angular.js:63:12
at ngRepeatAction (http://localhost:7070/vendor/angular/angular.js:24483:21)
at Object.$watchCollectionAction [as fn] (http://localhost:7070/vendor/angular/angular.js:14092:13)
at Scope.$digest (http://localhost:7070/vendor/angular/angular.js:14225:29)
at Scope.$apply (http://localhost:7070/vendor/angular/angular.js:14488:24)
at done (http://localhost:7070/vendor/angular/angular.js:9646:47)
at completeRequest (http://localhost:7070/vendor/angular/angular.js:9836:7)
at XMLHttpRequest.requestLoaded (http://localhost:7070/vendor/angular/angular.js:9777:9)
这些是在浏览器控制台中返回的 bourbon 项目。它们都具有相同的 bourbonId，从索引 0 开始。唯一过滤器现在返回 2 个 bourbon 对象（原始对象和一个重复对象？）而不是所有对象...：
[对象，对象，对象，对象，对象]0：对象$$hashKey："object:6"v：0avgRating：4blog："fjkd;asdljfkld;ksdfj"bourbonId：“54c2aa5556267e0000b5618c"comments: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"__proto: Object1: Object__v: 0avgRating: 4blog: "fjkd;asdljfkld;ksdfj"bourbonId: "54c2aa5556267e0000b5618c"comments: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"proto: Object2: Object$$hashKey: "object:7"v: 0avgRating: 0blog: "fjkd;asdljfkld;ksdfj"bourbonId: "54c2aa5556267e0000b5618c"comments: Array[0]length: 0__proto: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"proto: Object3: Object__v: 0avgRating: 0blog: "fjkd;asdljfkld;ksdfj"bourbonId: "54c2aa5556267e0000b5618c"comments: Array[0]length: 0__proto__: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"proto: Object4: Object__v: 0avgRating: 0blog: "fjkd;asdljfkld;ksdfj"bourbonId: "54c2aa5556267e0000b5618c"comments: Array[0]length: 0__proto__: Array[0]distillery: "woodford"location: "kentucky"name: "woodford reserve"photo: "http://aries-wineny.com/wp-content/uploads/2014/09/woodford-reserve.jpg"proto: Objectlength: 5__proto__: Array[ 0]
我想我已经将其缩小为服务器端的问题，在上面列出的控制器/聚合中。我需要找到一种方法来替换更新的文档，而不是每次在客户端/浏览器上调用 Bourbon.all / 运行 时都创建一个新文档......现在尝试解决它。任何提示，非常感谢。
这似乎是服务器端的问题，通过 $index 添加轨道将解决该问题。
ng-repeat='bourbon in bourbons track by $index
但问题是，它会显示重复的记录。
最好使用 AngularUI angular.unique filter
首先从 link 添加 JS，然后在应用依赖项中添加 'ui.filters' 模块。
ng-repeat='bourbon in bourbons | unique:'bourbonId'
希望这能解决您的问题。
谢谢。
这似乎只是一个过于字面的例子。您最终会在每个请求上得到重复的输出，因为这就是结果来自的商店的范围。
所以不是这个：
'use strict';
var Bourbon = require('../../../models/bourbon'),
Comment = require('../../../models/comment'),
DataStore = require('nedb'),
db = new DataStore(), // <-- globally scoped in the module :(
async = require('async');
module.exports = {
description: 'Get Bourbons',
notes: 'Get Bourbons',
tags: ['bourbons'],
handler: function(request, reply){
async.series(
[
function(callback){
最好这样做：
'use strict';
var Bourbon = require('../../../models/bourbon'),
Comment = require('../../../models/comment'),
DataStore = require('nedb'),
async = require('async');
module.exports = {
description: 'Get Bourbons',
notes: 'Get Bourbons',
tags: ['bourbons'],
handler: function(request, reply){
db = new DataStore(); // <--- Init store within request scope :)
async.series(
[
function(callback){