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javascript – Angular – 在服务URL中使用范围变量

作者:互联网

目前,我想从API获取数据,使用AngularJS服务发送一些搜索参数.在我的ng模型中,我有一个名为search的变量,我想将该变量用作API URL的参数.

我的第一个(不成功)方法是直接在服务中使用$scope.search变量:

$http.get('http://www.omdbapi.com/?s='+ $scope.search +'&type=series&r=json').then(function(data){
     deferred.resolve(data);
});

我已经read将$scope传递给服务是不可能的(并且不应该这样做),所以如何将scope变量用作服务中的参数,是否有更简洁的方法来设置除了添加字符串myUrl搜索之外的参数?

完整代码:

 myApp.service('showsService', function($http, $q){
    var deferred = $q.defer(); //promise to say 'im going to do this later'
    $http.get('http://www.omdbapi.com/?s=sherlock&type=series&r=json').then(function(data){
        deferred.resolve(data);
    });
    this.getShows = function(){
        return deferred.promise;
    }
    });

    myApp.controller("showsController", function($scope, showsService){
    $scope.$watch('search', function() {
      fetch();
    });

    function fetch(){
        var promise = showsService.getShows();
        promise.then(function(data){
        $scope.showsResult = data.data.Search; //using the name than comes back from the API
    });
    }
    });

解决方法:

只需将搜索作为参数传递给服务函数:

myApp.service('showsService', function($http){
    this.getShows = function(search){
        var url = 'http://www.omdbapi.com/s='+search+'&type=series&r=json';
        var promise = $http.get(url);
        return promise;
    };
});

然后在控制器中:

myApp.controller("showsController", function($scope, showsService){
   $scope.$watch('search', function(value) {
      fetch(value);
   });

   function fetch(search){
       var promise = showsService.getShows(search);
       promise.then(function(response){
           $scope.showsResult = response.data.Search;
       });
    };
});

由于$http服务已经返回一个承诺,因此无需使用$q.defer制作承诺.

更新

$http服务能够序列化参数:

myApp.service('showsService', function($http){
    this.getShows = function(search){
        //var url = 'http://www.omdbapi.com/s='+search+'&type=series&r=json';
        var url = 'http://www.omdbapi.com/'
        var config = { 
            params: { 
                s: search,
                type: 'series',
                r: 'json'
            }
        };
        var promise = $http.get(url, config);
        return promise;
    };
});

标签:javascript,angularjs,angular-services
来源: https://codeday.me/bug/20190702/1352481.html