Question

MEAN在这里堆叠新手。我创建了一个简单的应用程序，将名称和年龄作为练习。现在我被困在我必须将数组值推入我的mongoose数组的部分。

这是我的架构：

var schema = new mongoose.Schema({
    name: String,
    peoplelist : [{
        name: String,
        age: String
    }]
});

这是我的客户端控制器：

app.controller("IndexController", function ($scope, $resource) {
    var PeopleAPI = $resource('/api/post/');

    // This is used by ng-repeat
    $scope.inputfields = [{
        infoname: '',
        infoage: ''
    }];

    // This will be used when transferring details to mongoose schema
    $scope.arrayppl= {
        name: '',
        details: [$scope.inputfields]
    };

    // Adds new fields in the UI - adding friends is unlimited.
    $scope.addDetails = function () {
        $scope.inputfields.push({});
    }


    $scope.saveToDB = function () {
        var people = new PeopleAPI();

        // save name to main array (arrayppl)
        $scope.arrayppl["name"] = $scope.username;

        // save infoname and infoage to arraymen
        var len = $scope.inputfields.length;

        for (var i = 0; i <= len - 1; i++) {
            var tempArr = {};
            tempArr["infoname"] = $scope.inputfields[i].infoname;
            tempArr["infoage"] = $scope.inputfields[i].infoage;

            $scope.arraymen["details"].push(tempArr);
        }

        people.name = $scope.arrayppl["name"];

        var i = 0;
        angular.forEach($scope.arraymen["details"], function (item) {

            var peopleObj = {name: item[i].infoname, age: item[i].infoage};

            people.peoplelist.push(peopleObj); // <-- error gets triggered here

            i+=1;
        });

        people.$save(function(result){
           console.log(result);
        });
    }
});

这里＆＃39; sa Plunkr我的应用程序的样子，SO question我用作参考，因为它最接近我的应用程序试图做。

在people.peoplelist.push(peopleObj)行，我收到"Cannot read property 'push' of undefined.错误。这是否意味着我没有从mongoose正确获取我的数组模式？我该如何解决这个问题？

非常感谢任何回复。

一如既往地感谢您的指导。

Answer 1

var people = new PeopleAPI(); is like object.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/new

你试图推进对象。 push只能用于数组。

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects

Answer 2

最后在this post.的帮助下解决了这个问题。我对我的架构和客户端控制器进行了一些更改，以使其工作。

这就是我的所作所为：

我的新架构：

var schema = new mongoose.Schema({
    name: String,
    peoplelist : []
});

我的新控制器：

app.controller("IndexController", function ($scope, $resource) {
    var PeopleAPI = $resource('/api/post/');

    $scope.inputfields = [{
        infoname: '',
        infoage: ''
        }];

    $scope.arraymen = {
        name: '',
        details: []
    };

    $scope.addDetails = function () {
        $scope.inputfields.push({});
    }

    $scope.saveToDB = function () {
        var people = new PeopleAPI();

        // save name to main array (arraymen)
        $scope.arraymen["name"] = $scope.username;

        // save infoname and infoage to arraymen
        //var len = Object.keys($scope.inputfields.infoname).length;
        var len = $scope.inputfields.length;

        for (var i = 0; i <= len - 1; i++) {
            var tempArr = {};
            tempArr["infoname"] = $scope.inputfields[i].infoname;
            tempArr["infoage"] = $scope.inputfields[i].infoage;

            //$scope.arraymen["details"].push(tempArr);
            $scope.arraymen["details"].push({
                "name": tempArr["infoname"],
                "age": tempArr["infoage"]
            });
        }


        people.name = $scope.arraymen["name"];
        //people.peoplelist = new Array();
        people.peoplelist = [];


        for (var i = 0; i <= $scope.arraymen["details"].length - 1; i++) {
            people.peoplelist.push({
                name: $scope.arraymen["details"][i].name,
                age: $scope.arraymen["details"][i].age
            })

        }

        people.$save(function (result) {
            console.log(result);
        });

    }
});

如何在MEAN中的mongoose模式中正确推送数组值

2 个答案: