为什么Falcor的setValue()不能在外部模型上工作？
为什么Falcor的setValue()不能在外部模型上工作？
提问于 2015-08-25 20:33:31
在本地setValue()模型上使用法尔科时，它可以正常工作，但是当模型移动到服务器时，就会发生'500 (内部服务器错误)‘。
下面的示例工作正常(脚本在浏览器中运行)
var $ref = falcor.Model.ref;
var model = new falcor.Model({
cache: {
productsById: {
1: {
name: "Product ABC",
otherAdd: "something 1"
},
2: {
name: "Product 123",
otherAdd: "something 2"
},
},
_view: [ $ref('productsById[1]') ],
_cart: []
}
});
model.
getValue("_view[0].name").
then(function(response1) {
console.log( response1 );
model.
setValue("_view[0].name", "Another book").
subscribe(function(response2){
console.log( response2 );
});
});但是，当将此设置更改为远程Falcor模型时，它将失败。(脚本在浏览器中运行)
var $ref = falcor.Model.ref;
var model = new falcor.Model({source: new falcor.HttpDataSource('/model.json') });
model.
getValue("_view[0].name"). // <-- works fine
then(function(response1) {
console.log( response1 );
model.
setValue("_view[0].name", "Another book"). // <-- fails
subscribe(function(response2){ // <-- fails on both subscribe() and then()
console.log( response2 );
});
});使用以下节点脚本(脚本运行在服务器上)：
var express = require('express');
var app = express();
var falcor = require('falcor');
var falcorExpress = require('falcor-express');
var $ref = falcor.Model.ref;
function example(){
return {
cache: {
productsById: {
1: {
name: "Product ABC",
otherAdd: "something 1"
},
2: {
name: "Product 123",
otherAdd: "something 2"
},
},
_view: [ $ref('productsById[1]') ],
_cart: []
}
}
}
app.use('/model.json', falcorExpress.dataSourceRoute(function (req, res) {
return new falcor.
Model( example() ).
asDataSource();
}));
app.use(express.static(__dirname + '/'));
var server = app.listen(8080);控制台中的错误消息(调用setValue()时)：
POST http://localhost:8080/model.json 500 (Internal Server Error)
requestObserver @ falcor.browser.js:9294145.Observable.create.o.subscribe @ falcor.browser.js:9186_subscribe @ falcor.browser.js:2830182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:14256182.TapObservable.subscribeCore @ falcor.browser.js:16424tryCatcher @ falcor.browser.js:12847setDisposable @ falcor.browser.js:14304subscribe @ falcor.browser.js:14318182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:14256182.observableProto.materialize @ falcor.browser.js:16605tryCatcher @ falcor.browser.js:12847setDisposable @ falcor.browser.js:17513s @ falcor.browser.js:17530182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:14256182.MapObservable.subscribeCore @ falcor.browser.js:17073tryCatcher @ falcor.browser.js:12847setDisposable @ falcor.browser.js:14304subscribe @ falcor.browser.js:14318182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:14256182.MergeAllObservable.subscribeCore @ falcor.browser.js:15858tryCatcher @ falcor.browser.js:12847setDisposable @ falcor.browser.js:14304subscribe @ falcor.browser.js:14318182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:14256(anonymous function) @ falcor.browser.js:15419182.Rx.AnonymousObserver.AnonymousObserver.error @ falcor.browser.js:14066182.Rx.internals.AbstractObserver.AbstractObserver.onError @ falcor.browser.js:14000subscribeToSetResponse @ falcor.browser.js:4133182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:14256(anonymous function) @ falcor.browser.js:15409tryCatcher @ falcor.browser.js:12847setDisposable @ falcor.browser.js:17513s @ falcor.browser.js:17530182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:1425661.SetResponse.invokeSourceRequest @ falcor.browser.js:4031182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:14256182.observableProto.finally.observableProto.ensure @ falcor.browser.js:16522tryCatcher @ falcor.browser.js:12847setDisposable @ falcor.browser.js:17513182.ScheduledItem.invokeCore @ falcor.browser.js:13209182.ScheduledItem.invoke @ falcor.browser.js:13197runTrampoline @ falcor.browser.js:13517tryCatcher @ falcor.browser.js:12847scheduleNow @ falcor.browser.js:13528182.Rx.Scheduler.schedulerProto.scheduleWithState @ falcor.browser.js:13250s @ falcor.browser.js:17528182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:1425658.IdempotentResponse.ensureCollect @ falcor.browser.js:3696182.Rx.Observable.observableProto.subscribe.observableProto.forEach @ falcor.browser.js:14256subscribeToResponse @ falcor.browser.js:3956subscribe @ falcor.browser.js:3903(anonymous function) @ test.html:34
test.html:35 Error: Response code 500
at _handleXhrError (http://netflix.github.io/falcor/build/falcor.browser.js:9316:19)
at onXhrLoad (http://netflix.github.io/falcor/build/falcor.browser.js:9366:14)
at XMLHttpRequest.onreadystatechange (http://netflix.github.io/falcor/build/falcor.browser.js:9280:13)回答 1
Stack Overflow用户
回答已采纳
发布于 2015-08-27 08:47:33
这可能是明示的一个问题。在服务器端：
npm install --save body-parser和
var bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({extended: true}));页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/32213532
复制相关文章
相似问题
腾讯云开发者
