我正在使用Ionic框架创建一个混合应用程序,并且我建立了一个工厂来保存一个对象数组。我想使用$ filter服务来获取具有特定ID的数组中的对象。这是我现在的代码。我从这个堆栈溢出问题中得到了这个实现的想法:In Angular, I need to search objects in an array。
angular.module('prototype.services', [])
.factory('Patients', function($filter) {
var currentID;
var currentPatient = $filter('patientFilter')(patients, {id: currentID}, true);
var patients = [{
id: 1,
name: 'Alexander Hamilton'
}];
return {
all:function() {
return patients;
},
add: function(patient) {
patients.push( {
name: patient.name
})
},
setID: function(id) {
currentID = id;
},
getID: function() {
return currentID;
},
};
});
据我所知,这应该有效,因为我将$ filter注入我创建的工厂。我对角度很新,所以可能会有一些我不知道的东西。
完整错误是:
ionic.bundle.js:26794 Error: [$injector:unpr] Unknown provider: patientFilterFilterProvider <- patientFilterFilter <- Patients
http://errors.angularjs.org/1.5.3/$injector/unpr? p0=patientFilterFilterProvider%20%3C-%20patientFilterFilter%20%3C-%20Patients
at ionic.bundle.js:13438
at ionic.bundle.js:17788
at Object.getService [as get] (ionic.bundle.js:17941)
at ionic.bundle.js:17793
at Object.getService [as get] (ionic.bundle.js:17941)
at ionic.bundle.js:32697
at Object.<anonymous> (services.js:6)
at Object.invoke (ionic.bundle.js:17995)
at Object.enforcedReturnValue [as $get] (ionic.bundle.js:17834)
at Object.invoke (ionic.bundle.js:17995)
答案 0 :(得分:0)
您的代码假设您的模块附加了patientFilter
:
angular.module('prototype.services', [])
.filter('patientFilter', function(){/*...*/}) // doesn't exist, so unknown provider errors
您可能想要做的是以下......
angular.module('prototype.services', [])
.factory('Patients', function($filter) {
var currentID;
var patients = [{
id: 1,
name: 'Alexander Hamilton'
}];
return {
// ... other factory methods ...
getCurrentPatient: function(){
var currentPatient = $filter('filter')(patients, { // use generic 'filter' filter
id: currentID
}, true);
return currentPatient || patients[0];
}
}
});