Question

我有一个州解析为：

resolve: {
              accounts: function(utils) {
                return utils.getAccounts();
              },
              data: function(utils) {
                return utils.getData();
              },
              termsData: function(utils) {
                return utils.getTerms();
              }
            }

我需要确保仅在角度data返回termsData后才会调用accounts和resolve。

getAccounts函数类似于：

 function getAccounts() {
            var deferred = $q.defer();
            Restangular.setBaseUrl(baseUrl());
            var accountsService = Restangular.all(accountsUrl);
            accountsService.post({headers}).then(function(data) {
              deferred.resolve(data);
            }, function(ex) {
              deferred.reject(ex);
            });
            return deferred.promise;
          }

Answer 1

您可以像我在控制器中所做的那样添加帐户作为依赖项：

resolve: {
          accounts: function(utils) {
            return utils.getAccounts();
          },
          data: ['accounts', 'utils', function(accounts, utils) {
              accounts.then(function(data){
                 return utils.getData();
              }, function(data){
                 return $q.reject();
              });
          }]
        }
}

Answer 2

一旦getTerms函数承诺得到解决，您就可以调用其他两个函数，然后使用$q.all＆amp; resolve: { accounts: function(utils, $q) { return utils.getAccounts().then(function(accounts){ return $q.all([accounts, utils.getData(), utils.getTerms()]) }); } }承诺app.controller('mainCtrl', function($q, $scope, accounts){ console.log("accounts", accounts[0]) console.log("getData Response", accounts[1]) console.log("getTerms Response", accounts[2]) })。

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<强>控制器

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Answer 3

假设您需要异步获取所有数据，您可以简单地重构代码以利用promise模式。

var getAccounts = function(...) {
  return new Promise(resolve, reject) {
    ... do something and resolve or reject
  };
};

var getTermsData = funciton= function(...) {
  return new Promise(resolve, reject) {
    ... do something and resolve or reject
  };
};

var getData = = function(...) {
  return new Promise(resolve, reject) {
    ... do something and resolve or reject
  };
};

getAccounts.then(function(accounts) {
  return getTermData();
}.then(function(termData) {
  return getData(data);
}.catch(function() {
  // something went wrong!
}

角度承诺应该称其他承诺

3 个答案: