我正在制作一个简单的Angular应用来管理收入。收入来自我存储在json中的项目(用于测试目的)。
所以,基本上,我在Angular中使用一个服务来获取这个json,我希望有另一个服务调用Projects服务并过滤每个项目的收入。
以下是代码:
facturateApp.service('Projects', function($http){
var Projects = {
async: function() {
var promise = $http.get('base.json').then(function (response) {
return response.data;
});
return promise;
}
};
return Projects;
});
facturateApp.service('Incomes', function(Projects){
var incomes = [];
Projects.async().then(function(d) {
var projects = d;
angular.forEach(projects, function(project){
if(typeof(project.account.accountAmount) == 'number' && project.account.accountAmount > 0){
var newIncome = {};
newIncome.projectName = project.projectName;
newIncome.clientName = project.clientName;
newIncome.typeIncome = "Accompte";
newIncome.amount = project.account.amountAccount;
newIncome.date = project.account.accountDate;
newIncome.notes = project.account.accountType;
incomes.push(newIncome);
}
});
angular.forEach(projects, function(project){
if (typeof(project.total.totalAmount) == 'number' && project.total.totalAmount > 0){
var newIncome = {};
newIncome.projectName = project.projectName;
newIncome.clientName = project.clientName;
newIncome.typeIncome = "Accompte";
newIncome.amount = project.total.totalAmount;
newIncome.date = project.total.totalDate;
newIncome.notes = project.total.totalType;
incomes.push(newIncome);
}
});
});
console.log(incomes); // still returns [];
return incomes;
});
我的问题是最后一个日志返回一个空数组。实际上它按预期工作:incomes
在执行Projects.async().then(function(d)
之前返回。
但是我不知道在调用另一个服务的服务中返回incomes
之前等待执行此函数...
任何帮助?
答案 0 :(得分:3)
这是异步调用的工作原理:如果Incomes
服务数据以异步方式填充,那么它也必须返回promise。
我会创建一些方法buildAndGetIncomes
,它会调用Projects.async()
并在获取数据时使用>向控制者返回新的承诺:
facturateApp.service('Incomes', function(Projects, $q){
var self = this;
var deferred = $q.defer();
var incomes = [];
self.buildAndGetIncomes = function(){
Projects.async().then(function(d) {
var projects = d;
angular.forEach(projects, function(project){
if(typeof(project.account.accountAmount) == 'number' && project.account.accountAmount > 0){
var newIncome = {};
newIncome.projectName = project.projectName;
newIncome.clientName = project.clientName;
newIncome.typeIncome = "Accompte";
newIncome.amount = project.account.amountAccount;
newIncome.date = project.account.accountDate;
newIncome.notes = project.account.accountType;
incomes.push(newIncome);
}
});
angular.forEach(projects, function(project){
if (typeof(project.total.totalAmount) == 'number' && project.total.totalAmount > 0){
var newIncome = {};
newIncome.projectName = project.projectName;
newIncome.clientName = project.clientName;
newIncome.typeIncome = "Accompte";
newIncome.amount = project.total.totalAmount;
newIncome.date = project.total.totalDate;
newIncome.notes = project.total.totalType;
incomes.push(newIncome);
}
});
deferred.resolve(incomes);
});
return deferred.promise;
};
});
我们打电话给控制器:
Incomes.buildAndGetIncomes().then(function(incomes) {
// ...
}, function(error) {
// ..
});