无法在 xhr.then 中返回"result" ('dojo/request/xhr')

Question

我有一些问题，当我返回"结果"在xhr.then()和我使用dojo 1.10.4请帮助我!

下面的代码连接API与xhr ('dojo/request/xhr')在dojo:

remandFlow: function(postData, flowId) {
        return xhr(this.REMAND_URL + flowId, {
            method: 'POST',
            data: postData,
            handleAs: 'json',
            headers: {'X-CSRFToken': cookie("csrftoken")}
        }).then(
            lang.hitch(this, function(result){
                return result;
            }),
            lang.hitch(this, function(error){
                return error;
            })
        );
    },

下面的代码得到上面代码的结果:

editStepUser: function(stepComponent, routeComponent) {
        this.model.remandFlow(postData).then(
            function(result){
                console.log(result) //I can not get it, It's undefined
                result.targeted_step_id = postData.route_step_id;
            },
            function(result){
                result.targeted_step_id = postData.route_step_id;
            }
        );
    },

所以，在第二个代码中，我不能得到结果，结果是"未定义"。请帮帮我，我是道场新手。

谢谢! !

Answer 1

如果你这样测试会发生什么?

remandFlow: function(postData, flowId) {
        // edit : added console.log
        console.log('remandFlow : ' , postData , '|' , flowId);
        console.log('remandFlow => this.REMAND_URL : ' , this.REMAND_URL);

        return xhr(this.REMAND_URL + flowId, {
            method: 'POST',
            data: postData,
            handleAs: 'json',
            headers: {'X-CSRFToken': cookie("csrftoken")}
        }).then(
                function( result ){ return result; } ,
                function( error  ){ return error;  }
            /*
            lang.hitch(this, function(result){
                return result;
            }),
            lang.hitch(this, function(error){
                return error;
            })
            */
        );
    },

Answer 2

在第一个代码中，我将使用deferred来返回deferred.promise。

declare(['dojo/Deferred',.....], function(Deferred,....){ 
remandFlow: function(postData, flowId) {
        var deferred = new Deferred();
        xhr(this.REMAND_URL + flowId, {
            method: 'POST',
            data: postData,
            handleAs: 'json',
            headers: {'X-CSRFToken': cookie("csrftoken")}
        }).then(
            lang.hitch(this, function(result){
                deferred.resolve(result);
            }),
            lang.hitch(this, function(error){
                deferred.reject(error);
            })
        );
        return deferred.promise;
    },