I am using ember-data 1.0.0-beta.3 RestAdapter. After creating model, I transition to that newly created record but the Id is being shown as 'null' in URL.
What JSON should I return from my POST service.
Here is the code from, action of my route, to creating record.
var user = this.store.createRecord('user', model);
user.save();
this.transitionTo('user', user);
The REST call is successful i.e. record is created in DB but id is show as null in URL i.e. http://myserver.com/#/user/null
I return following JSON
{"user": [{"id":"15","name":"su"}]}
I have also tried to return only id i.e. "15" but it has no effect.
Please guide?
Have you tried:
var user = this.store.createRecord('user', model);
this.transitionTo('user', user.save());
transitionTo accept a promise as second argument, and will wait it be finished, and get the resolved data. So ensures that you have the id.
And maybe you need to change your payload to:
{"user": {"id":"15","name":"su"} }
Since you're saving a single resource, not an array.
Related
I was using OMDBapi to get the details of different movies. I successfully fetched the result and it returns a json object like this;
{"Title":"WWA: The Inception","Year":"2001","Rated":"N/A","Released":"26 Oct 2001","Runtime":"N/A","Genre":"Action, Sport","Director":"N/A","Writer":"Jeremy Borash","Actors":"Bret Hart, Jeff Jarrett, Brian James, David Heath","Plot":"N/A","Language":"English","Country":"Australia","Awards":"N/A","Poster":"https://m.media-amazon.com/images/M/MV5BNTEyNGJjMTMtZjZhZC00ODFkLWIyYzktN2JjMTcwMmY5MDJlXkEyXkFqcGdeQXVyNDkwMzY5NjQ#._V1_SX300.jpg","Ratings":[{"Source":"Internet Movie Database","Value":"6.0/10"}],"Metascore":"N/A","imdbRating":"6.0","imdbVotes":"22","imdbID":"tt0311992","Type":"movie","DVD":"N/A","BoxOffice":"N/A","Production":"N/A","Website":"N/A","Response":"True"}
Note that we get this type of object from the api if we want to get a particular movie details and that is what i was doing. Now to show the different details to a user, i started parsing this JSON object which works fine but when i try to get the value of the Value key present inside the Ratings key, it returns undefined.
I am working with react-native. After getting the data, i stored it inside the state, named it as details. Then to get it;
this.state.details.Title //if i wanted to get the Title and it works fine.
Then for Value inside Ratings;
this.state.details.Ratings[0].Value
But it returns undefined.
Also note that this works fine in pure Javascript as i parsed the dict in the browser console in the same way and it returned the correct value.
Here is more code;
componentDidMount() {
this.fetchData();
}
fetchData = async () => {
const response = await fetch(`http://www.omdbapi.com/?i=${this.props.navigation.getParam('i')}&apikey=******`) // where this.props.navigation.getParam('i') is the omdbid of the movie
const result = await response.json()
this.setState({details: result})
}
Here is error log;
undefined is not an object (evaluating 'this.state.details.Ratings[0]')
You're most likely trying to access state object before fetch has done it's job .... it's an async op ... so you should make sure your data is ready before rendering...
if (this.state.details) {
// start rendering...
}
More Explanation
your setState function should be executed right after fetch has finished its job, and since it's an async operation, it's going to take some time ...During that time, render function is executed with no state.details --> causing your issue ...
That's why you should check for state before rendering ... besides, the optional chaining trick Silversky Technology mentioned in his answer
If the value property you are accessing from the object might be not available for all the movies in the data you are getting from API response so it might cause you to error when accessing key from undefined objects.
To overcome the issue there is a way, you can try a fix as below:
this.state.details.Ratings[0]?.Value
The ? symbol lets the javascript not give an error when the value key not available in the object. it will make the accessing of property optional.
When storing objects in states it often causes problems as you are doing in line
this.setState({details: result})
Save result after strigifying it like
JSON.stringify(result)
this.setState({details: result})
Then when fetching form state, parse it back to object by
var result = JSON.parse(this.state.details)
Then you should be able to access it
You can access Ratings[0].Value by
this.state.details.Ratings && this.state.details.Ratings[0].Value
like,
<Text> {this.state.details.Ratings && this.state.details.Ratings[0].Value} </Text>
I am currently using AngularFire, and trying to get the length of objects in my database.
In my Firebase, the structure looks like
popping-fire-5575
celio
-JgaQt-tNq-gRVIVZdCD
artist:
track:
-JgaQuBoYk9VX3pWylx3
artist:
track:
-JgaQuf_pyBFJ7EA1Fo_
artist:
track:
In my controller,
var profileObject = FirebaseDemo.getBroadcast($routeParams.param);
var twotwo = profileObject.$asObject();
twotwo.$bindTo($scope, 'data');
When I console log the variable 'twotwo',
I get in return
Object
$$conf: Object
$id: "celio"
$priority: null
-JgaQt-tNq-gRVIVZdCD: Object
-JgaQuBoYk9VX3pWylx3: Object
-JgaQuf_pyBFJ7EA1Fo_: Object
__proto__: Object
However, I have tried all different ways to get the length, but I am not able to get to succeed. Could someone give me some directions or tips?
Firebase loads (and synchronizes) you data asynchronously, so by the time your console.log statement runs it is probably still busy loading the data.
Luckily AngularFire has a way to notify and run your code when the initial loading of data has completed:
var twotwo = profileObject.$asArray();
twotwo.$loaded().then(function(data) {
console.log('Initial data loaded', data.length);
});
The two main changes from your code:
Use $asArray() instead of $asObject(), since your data structure is an array
Listen for the $loaded "event" and respond to that
Note that AngularFire will already notify AngularJS of any changes to the data, so you won't have to respond to $loaded if you just bind the data to the $scope and show it in your view.
I'm using Ember-Data 1.0.0.Beta-9 and Ember 1.7 to consume a REST API via DreamFactory's REST Platform. (http://www.dreamfactory.com).
I've had to extend the RESTAdapter in order to use DF and I've been able to implement GET and POST requests with no problems. I am now trying to implement model.save() (PUT) requests and am having a serious hiccup.
Calling model.save() sends the PUT request with the correct data to my API endpoint and I get a 200 OK response with a JSON response of { "id": "1" } which is what is supposed to happen. However when I try to access the updated record all of the properties are empty except for ID and the record on the server is not updated. I can take the same JSON string passed in the request, paste it into the DreamFactory Swagger API Docs and it works no problem - response is good and the record is updated on the DB.
I've created a JSBin to show all of the code at http://emberjs.jsbin.com/nagoga/1/edit
Unfortunately I can't have a live example as the servers in question are locked down to only accept requests from our company's public IP range.
DreamFactory provides a live demo of the API in question at
https://dsp-sandman1.cloud.dreamfactory.com/swagger/#!/db/replaceRecordsByIds
OK in the end I discovered that you can customize the DreamFactory response by adding a ?fields=* param to the end of the PUT request. I monkey-patched that into my updateRecord method using the following:
updateRecord: function(store, type, record) {
var data = {};
var serializer = store.serializerFor(type.typeKey);
serializer.serializeIntoHash(data, type, record);
var adapter = this;
return new Ember.RSVP.Promise(function(resolve, reject) {
// hack to make DSP send back the full object
adapter.ajax(adapter.buildURL(type.typeKey) + '?fields=*', "PUT", { data: data }).then(function(json){
// if the request is a success we'll return the same data we passed in
resolve(json);
}, function(reason){
reject(reason.responseJSON);
});
});
}
And poof we haz updates!
DreamFactory has support for tacking several params onto the end of the requests to fully customize the response - at some point I will look to implement this correctly but for the time being I can move forward with my project. Yay!
EmberData is interpreting the response from the server as an empty object with an id of "1" an no other properties in it. You need to return the entire new object back from the server with the changes reflected.
My backend is Parse.com's REST API, and parse send me back a results object that looks like:
{
...fields...
}
when there is only object, meaning any time there is a create, a read or an update to one record. When I GET a collection of objects from Parse, it sends out a results object that looks like:
{
results: [
{
...fields...
}
]
}
In ST, when I have my proxy's reader's rootProperty set to: 'results', my reader isn't able to read the record Parse sends on a create or an update and therefore the local record doesn't get synced with the one the server sent.
When I have my reader's rootProperty set to: '', my local record gets synced with the one that Parse sent, but now my list, which takes a store, isn't displaying the list of records, because Parse sends that with a "results" node.
I tried using setRootProperty, but despite confirming that the reader's root property just before calling save() on a record is in fact: '', the local record doesn't sync with Parse's response. As soon as I remove the logic that does real time changes to root property, it starts working again.
What is the suggested way of handling this situation? Any help is much appreciated! Thanks!
So you have one store with a proxy that has a certain rootProperty but you olso have 2 type of response, single object or an array of objects inside results. If it is so, definitly your proxy is able to read only one type of response.
Some solutions:
-if you can operate on server make sure you send always an array of results whether the response contains none, one or many results.
-implement a custom reader (this is what i did when i had to manage different responses and make some changes on data in the meanwhile)
Ext.define('MyApp.store.MyStore',{
extend:'Ext.data.Store',
model:'MyApp.model.MyModel',
proxy: {
type:'jsonp',
url:'#'
},
autoLoad:false,
loadSolr:function(PARAMS){
this.groupField = groupField;
Ext.data.JsonP.request({
scope:this,
url: 'http://myserver.com',
callbackKey: 'json.wrf',
params: {
PARAMS
},
success: function(response) {
// handle your response here
var records = [];
Ext.each(response.results, function(record){
records.push({
field1: record.field1,
field2: record.field2
});
});
//load your data into store
this.loadData(records);
}
});
}
});
Hope it helps, post some code if i misunderstood something
Here is a typical JQGrid JSON response:
{
"page":1,
"records":537,
"rows":[..],
"rowCount":10,
"total":54
}
Along with this, I want to send additional custom data. For example, I'd like to send the database time of the last search so that I can lazy-reload my grid whenever changes have occurred since then. Here is how I would like to send that data:
{
//Custom name-value pairs:
"nameValues":{"lastSearchTime":"2011/09/01:14:14:56"},
//Normal JSON data:
"page":1,
"records":537,
"rows":[..],
"rowCount":10,
"total":54
}
The problem is that JQGrid swallows up the JSON response rather than forwarding it to the gridComplete method. In other words, params is undefined in the following function:
function myGridComplete (params){
//params is undefined!
var JSONResponse = ?;//I need your help here!!!
globalGridVariables.lastSearchTime = JSONResponse.nameValues.lastSearchTime;
//Rest of grid complete method
..
}
Please let me know if there is a way to get access to the JSON response object in the gridComplete method, or if there is another supported way to add custom data to a JSON response.
Thanks much!
Note: I don't want to send this as a hidden column, because that would be inefficient.
You can use loadComplete instead of gridComplete. The loadComplete event has one parameter (for example data) which represent the full data from the server response inclusive all of your extensions.
Alternative you can rename the nameValues to userdata and use $('#list').jqGrid('getGridParam', 'userData') to get the value. See here for more information.
Moreover you can consider to use more HTTP caching (see here and here) for the aims which you described in your question.
You can use beforeProcessing that has the deserialized response and gets active before gridComplete and loadComplete.
For example:
beforeProcessing: function (data, status, xhr) {
myArray = data.rows;
}
And just to make it more clearer from the documentation:
Below is the execution order of the events when a ajax request is made
beforeRequest
loadBeforeSend
serializeGridData
loadError
beforeProcessing
gridComplete
loadComplete