0
我有一个companies
集合,其中country_id
字段指的是_id
中的countries
集合。如何在Restularular中模拟AngularJS中的一对一关系
Companies
如下:
{
name: "acme",
address: "zossener straße 123",
postalCode: "10961",
city: "berlin",
country_id: "56d58d68ab68b5cf3f72788e"
}
Countries
如下:
{
_id: "56d58d68ab68b5cf3f72788e",
name: "Germany"
}
我想要做的,是取代的Companies
的country_id
到Countries.name
。因此,对于每个公司我想要国家名称,而不是国家/地区ID。我正在使用Restangular。我的控制器:
// creates a Restangular object of the 'companies' endpoint for later use
var Companies = Restangular.all('companies');
// for later pushing the countries
$scope.allCompanies = [];
// queries companies collection
Companies.getList().then(function(companies) {
$scope.companies = companies;
// iterates each company to get the country name
for (var i = 0; i < $scope.companies.length; i++) {
// prepares temp object to be pushed to $scope.allCompanies
var buffer = {
name: $scope.companies[i].name,
address: $scope.companies[i].address,
postalCode: $scope.companies[i].postalCode,
city: $scope.companies[i].city,
countryId: $scope.companies[i].country_id
};
// queries countries collection passing country_id
var Country = Restangular.one('countries', $scope.companies[i].country_id);
Country.get().then(function(country) {
// sets country name for temp object based on country_id
buffer.country = country.name;
// pushes buffer to $scope.allCompanies
$scope.allCompanies.push(buffer);
});
};
运行时,$scope.allCompanies
显示了只有一个国家,这是分配给buffer
最后一个国家的所有公司。我认为承诺有问题,但不确定。任何帮助?提前致谢。
完美地工作!你能解释一下为什么我的代码不工作吗?我对此并不十分清楚。 –
您的循环在完成对“国家”的请求之前正在更改“i”的值(因为它是异步的)。这使得在答案之前“缓冲区”的引用发生了变化,然后承诺会更新一个不同的“缓冲区”变量。这使得结果变得有趣。通过使代码调用'国家'保持参考,你可以避免这一点。 –