我在控制器中获取服务价值时遇到问题。 我使用服务从API获得了价值:
import pandas as pd
from sklearn import linear_model
def rolling_beta(X, y, idx, window=255):
assert len(X)==len(y)
out_dates = []
out_beta = []
model_ols = linear_model.LinearRegression()
for iStart in range(0, len(X)-window):
iEnd = iStart+window
model_ols.fit(X[iStart:iEnd], y[iStart:iEnd])
#store output
out_dates.append(idx[iEnd])
out_beta.append(model_ols.coef_[0][0])
return pd.DataFrame({'beta':out_beta}, index=out_dates)
df_beta = rolling_beta(df_rtn_stocks['NDX'].values.reshape(-1, 1), df_rtn_stocks['CRM'].values.reshape(-1, 1), df_rtn_stocks.index.values, 255)
我试图在控制器中获取和使用值:
angular.module('app').factory('service',
['$q', '$rootScope', '$timeout', '$http',
function ($q, $rootScope, $timeout, $http) {
// create user variable
var user = null;
// return available functions for use in the controllers
return ({
isLoggedIn: isLoggedIn,
getUserStatus: getUserStatus,
login: login,
getEmail: getEmail
});
function isLoggedIn() {
if(user) {
return true;
} else {
return false;
}
}
function getUserStatus() {
return $http.get('/user/status')
// handle success
.success(function (data) {
if(data.status){
user = true;
} else {
user = false;
}
})
// handle error
.error(function (data) {
user = false;
});
}
function login(username, password) {
// create a new instance of deferred
var deferred = $q.defer();
// send a post request to the server
$http.post('/user/login',
{username: username, password: password})
// handle success
.success(function (data, status) {
if(status === 200 && data.status){
user = true;
deferred.resolve();
} else {
user = false;
deferred.reject();
}
})
// handle error
.error(function (data) {
user = false;
deferred.reject();
});
// return promise object
return deferred.promise;
}
function getEmail() {
// create a new instance of deferred
var deferred = $q.defer();
$http.get('/email/'+$rootScope.username)
.success(function (data) {
console.log(data);
deferred.resolve();
})
.error(function (data) {
deferred.reject();
})
return deferred.promise;
}
}]);
但在控制器中有angular.module('app')
.controller('myController', ['$rootScope', '$scope', '$state', '$http', '$q', 'service', function ($rootScope, $scope, $state, $http, $q, service) {
$scope.email;
$scope.getEmail = function() {
// call getEmailFromDB from service
service.getEmail()
// handle success
.then(function (data) {
$scope.email = data; //here I got undefined
console.log($scope.email);
})
// handle error
.catch(function () {
$scope.error = true;
$scope.errorMessage = "wrong@mail.com";
});
};
$scope.getEmail();
}]);
值。
关于$ q的文档,我在服务和控制器中使用undefined
函数。
有人知道问题在哪里吗?
答案 0 :(得分:1)
您忘了将结果发送到您的服务中
deferred.resolve(data);
答案 1 :(得分:1)
在您的代码中,您没有回复任何承诺,为此,您必须致电deferred.resolve(data)
或deferred.reject(data)
。
您可以直接返回$ http请求,而不是创建延迟对象。 例如:
function getEmail() {
return $http.get('/email/'+$rootScope.username).then(
function success(data){
console.log(data);
return data;
},
function error(data){
console.error(data);
}
);
}
另请注意,.success()
和.error()
已弃用,您应使用.then()
并传递success
和error
个功能。