I've got a dnn module that I've created that has no problem retrieving data from the server using the WebAPI. However, when I try to perform an update, I continue to get errors no matter what I try. Viewing in Firebug, I can the data being posted:
!(http://www.virtual-essentials.com/personal/firebug1.png)
But, when I debug, I see nothing but default (null.setnull) values (bool = false, int = 0, string= empty).
Then, of course the response is no good and results in this:
!(http://www.virtual-essentials.com/personal/firebug2.png)
I've tried every combination of things I can think of, but cannot get this figured out and I'm going nuts.
Here is the ajax call:
//U//operation - update
self.updateTestimonial = function (objItem) {
var method = "UpdateTestimonial";
self.UpdatePublishStatus(objItem);
$.ajax({
type: "POST",
contentType: "application/json",
url: sf.getServiceRoot('VirtualEssentials/Testimonials') + "TestimonialWeb/" + method,
beforeSend: sf.setModuleHeaders,
data: ko.toJSON({ item: new TestimonialInfoDTO(objItem.TestimonialID(), objItem.IsPublished())}),
success: function (data) {
self.userAlertText(objItem.Testimonial() + ' changes have been saved');
//self.getTestimonials(); //get the new data after updates
},
error: function (xhr, status, error) {
self.userAlertText('OOPS! Error updating ' + objItem.Testimonial + '<br />' + (error));
//put the status back
self.UpdatePublishStatus(objItem);
}
});
};
Here is the WebAPI Controller call:
[HttpPost]
[DnnModuleAuthorize(AccessLevel = SecurityAccessLevel.Edit)]
public System.Net.Http.HttpResponseMessage UpdateTestimonial(TestimonialInfoDTO item)
{
try
{
Controller.TestimonialController objController = new Controller.TestimonialController();
objController.PublishTestimonial(item.TestimonialID, item.IsPublished);
}
catch (HttpResponseException ex)
{
return ex.Response;
}
}
Any help on this is sincerely appreciated!!
It never fails that you find a solution as soon as you ask for help. I pulled the source code for the core Journal module and saw that they were posting the post data a bit differently. I modified the json string that I was sending and it all went through. I thought since the parameter for the method was:
UpdateTestimonial(TestimonialInfoDTO item)
that it was expecting:
{"item":{"TestimonialID":14,"IsPublished":false}}
but, it turns out what it really wants is:
{"TestimonialID":14,"IsPublished":false}
Anyhow, here is what I did to make the changes; I just changed the way I built the data to post.
var data = new TestimonialInfoDTO(objItem.TestimonialID(), objItem.IsPublished());
$.ajax({
...
data: ko.toJSON(data),
I hope this helps someone. There isn't a lot of Dnn WebAPI documentation out at this point.
Thanks!
Briana
Related
I am very new to this, so please bear with me-- I have currently have an operational google apps script on the backend of a google sheet that is generated from Google Form answers. I am essentially setting up a ticket form in google forms that will trigger the data in the corresponding sheet to be sent via api call to our ticketing system. It works great, but I am trying to optimize it currently. The goal is to take the json response I get using:
Logger.log(response.getContentText());
which provides me the following info:
Aug 9, 2020, 11:44:40 AM Info {"_url":"https://testticketingsystem.com/REST/2.0/ticket/123456","type":"ticket","id":"123456"}
and send another API call to send data to that new ticket.
Here's a code snippet:
var payload = {
"Subject": String(su),
"Content": String(as),
"Requestor": String(em),
"Queue": String(qu),
"CustomFields": {"CustomField1": String(vn), "CustomField2": String(vb), "CustomField3":
String(vg), "CustomField4": String(av), "CustomField5": String(ov), "CustomField6":
String(sd)}
}
var options = {
'method': 'post',
"contentType" : "application/json",
'payload': JSON.stringify(payload),
'muteHttpExceptions': true
}
var url = "https://testticketingsystem.com/REST/2.0/ticket?token=****************";
var response = UrlFetchApp.fetch(url,options);
Logger.log(response.getContentText());
} catch (error) {
Logger.log(error.toString());
}
}
After the ticket is created, how do I script the use of that ID number as a variable into my next api call?
Thank you!
UrlFetchApp.fetch returns a HTTPResponse, and if you expect JSON then you should be able to just use JSON.parse() to create an object from the text. (The JSON object is a standard JavaScript global object like Math; it is not Google Apps Script specific.)
If all goes well, you should just be able to use
var response = UrlFetchApp.fetch(url,options);
var data = JSON.parse(response.getContentText());
var id = data.id;
and then use that id for your next fetch().
Notes
If your literal response is indeed
Aug 9, 2020, 11:44:40 AM Info {"_url":"https://testticketingsystem.com/REST/2.0/ticket/123456","type":"ticket","id":"123456"}
you will run into trouble as everything until the { is invalid JSON (use a linter if you need to check yourself). But I'm assuming that was added by the console when you logged JSON, and not in the actual response itself.
JSON.parse() throws an error with invalid JSON, so you can use try/catch if needed.
You can also check the headers before you try to JSON.parse().
Here's an example that checks and handles issues, should they arise.
var type = response.getHeaders()["Content-Type"];
var text = response.getContentText();
if (type === "application/json") {
try {
var data = JSON.parse(text);
} catch (error) {
return Logger.log("Invalid JSON: " + response.getContentText(text));
}
} else {
return Logger.log("expected JSON, but got response of type: " + type);
}
// if we get to this line, data is an object we can use
I'm at a loss with why this isn't working...
I have a .NET Core app using EF Core, and I'm making an Ajax call via jQuery to my controller to retrieve some data from the database via EF Core. Debugging the call via my developer tools in the browser (IE/Chrome) results in a status of failed/aborted. Yet when I step through my method in my controller, the method seems to be able to retrieve the data from the database via EF Core just fine.
Here's my controller:
public ActionResult GetInfo(string term)
{
using (var dbContext = new DatabaseContext())
{
// use DbContext to get data from the database
var retrievedData = dbContext.TableName.Where(...);
return Json(retrievedData.Select(data => new {
id = data.id,
text = data.text
}));
}
}
And here's the jQuery:
$(#element).select2({
...
ajax: {
url: $(#element).attr("data-getinfo"),
dataType: 'json', // tried this with jsonp and application/JSON with no luck
contentType: 'application/json; charset=utf-8',
delay: 250,
data: function (params) {
return: { term: params.term};
},
processResults: function (data) {
return {
results: $.map(data, function (item) {
return {
id: item.id, text: item.text
}
})
}
},
},
....
});
The Ajax calls work with previous apps I've worked on, but they used MVC 5 and EF 6. This also works if I retrieve dummy data, IE instead of using EF Core to get the data, I return fake data built into the controller. What gives?
To clarify the root of your problem: You are querying your database and returning an IEnumerable as a JsonResult. But first, you need to understand one step before. Calling .Where returns an IQueryable. You can think of an IQueryable as if it is a TSQL command that was not yet execute on the database. Only calls that will enumerate the results will trigger the materialization of the query.
So you did this:
// .Where returns an IQueryable. You can "chain" more wheres later.
// the query will still not be executed
var retrievedData = dbContext.TableName.Where(...);
// This then returns an IEnumerable to the client.
// The Select will materialize (execute) the query
return Json(retrievedData.Select(data => new {
id = data.id,
text = data.text
}));
The problem with your code is: .Select returns an IEnumerable which enumerates the results. But, by the time the browser or whatever client you are dealing with starts to enumerate the results, your database connection is already closed, because you used using block around your dbContext (which is kind of correct.. see comments in the end).
So, to fix it, you need basically to enumerate the results yourself or not close the connection (let the framework close for you when the request is finished..). This minor change fix the problem:
// ToList() will enumerate all the results in memory
var retrievedData = dbContext.TableName.Where(...).ToList();
Other comments:
You don't need (also shouldn't) manage the creation of the dbContext by yourself. You can register it in the DI container and the framework will do the rest for you. You can take a look in the EF Core docs to have an idea on how it is done.
Not an ideal solution, but I got it working. I suspect it might have to do with how .NET Core or EF Core was returning data to the browser, but I can't say for sure yet.
I ended up using Json.NET for a workaround. Performance isn't bad (I tried a query with hundreds of records and it only took a couple of seconds at most), and I was already using it for an external API call.
public ActionResult GetInfo(string term)
{
using (var dbContext = new DatabaseContext())
{
// use DbContext to get data from the database
var retrievedData = dbContext.TableName.Where(...);
var initJson = Json(retrievedData.Select(data => new {
id = data.id,
text = data.text
}));
var serializedJson = Newtonsoft.Json.JsonConvert.SerializeObject(initJson);
var deserializedJson = Newtonsoft.Json.JsonConvert.DeserializeObject(serializedJson);
return Json(deserializedJson);
}
}
I am pretty new in angularjs and I've looked around to try to find some posts on this and there are many but none that address my specific question (that I could find).
It is as simple as that, I want to send two parameters through angularjs ($http POST) where my first parameter is a json of class object and second is int. What I tried :
var url = '../Request/'+ id;
$http({
method: 'POST',
url: url,
data: Data
}).success(function (data, status, headers, config) {
deferred.resolve(data);
}).error(function (data, status, headers, config) {
debug.error(data);
deferred.reject('An error occured while saving the request');
});
In my web api Controller I have :
[POST("Request/{id}")]
public bool SaveRequest(Data data, int id)
{
...
...
}
When I send only Data it works for me but when I tried to add Id and Data both it won't work. Please let me know what needs to be done for the same, Thanks.
Have you tried using [FromBody] attribute like this
[POST("Request/{id}")]
public bool SaveRequest([FromBody] Data data,[FromUrl] int id)
{
...
More info on parameter binding
I'd like to use custom headers to provide some more information about the response data. Is it possible to get the headers in a response from a dojo datagrid hooked up to a jsonRest object via an object store (dojo 1.7)? I see this is possible when you are making the XHR request, but in this case it is being made by the grid.
The API provides an event for a response error which returns the response object:
on(this.grid, 'FetchError', function (response, req) {
var header = response.xhr.getAllResponseHeaders();
});
using this I am successfully able to access my custom response headers. However, there doesn't appear to be a way to get the response object when the request is successful. I have been using the undocumented private event _onFetchComplete with aspect after, however, this does not allow access to the response object, just the response values
aspect.after(this.grid, '_onFetchComplete', function (response, request)
{
///unable to get headers, response is the returned values
}, true);
Edit:
I managed to get something working, but I suspect it is very over engineered and someone with a better understanding could come up with a simpler solution. I ended up adding aspect around to allow me to get hold of the deferred object in the rest store which is returned to the object store. Here I added a new function to the deffered to return the headers. I then hooked in to the onFetch of the object store using dojo hitch (because I needed the results in the current scope). It seems messy to me
aspect.around(restStore, "query", function (original) {
return function (method, args) {
var def = original.call(this, method, args);
def.headers = deferred1.then(function () {
var hd = def.ioArgs.xhr.getResponseHeader("myHeader");
return hd;
});
return def;
};
});
aspect.after(objectStore, 'onFetch', lang.hitch(this, function (response) {
response.headers.then(lang.hitch(this, function (evt) {
var headerResult = evt;
}));
}), true);
Is there a better way?
I solved this today after reading this post, thought I'd feed back.
dojo/store/JsonRest solves it also but my code ended up slightly different.
var MyStore = declare(JsonRest, {
query: function () {
var results = this.inherited(arguments);
console.log('Results: ', results);
results.response.then(function (res) {
var myheader = res.xhr.getResponseHeader('My-Header');
doSomethingWith(myheader);
});
return results;
}
});
So you override the normal query() function, let it execute and return its promise, and attach your own listener to its 'response' member resolving, in which you can access the xhr object that has the headers. This ought to let you interpret the JsonRest result while fitting nicely into the chain of the query() all invokers.
One word of warning, this code is modified for posting here, and actually inherited from another intermediary class that also overrode query(), but the basics here are pretty sound.
If what you want is to get info from the server, also a custom key-value in the cookie can be a solution, that was my case, first I was looking for a custom response header but I couldn't make it work so I did the cookie way getting the info after the grid data is fetched:
dojo.connect(grid, "_onFetchComplete", function (){
doSomethingWith(dojo.cookie("My-Key"));
});
This is useful for example to present a SUM(field) for all rows in a paginated datagrid, and not only those included in the current page. In the server you can fetch the COUNT and the SUM, the COUNT will be sent in the Content-Range header and the SUM can be sent in the cookie.
I am using OData together with JQuery. My problem here is that I need to retrieve the Header as I need the Header value. Do you guys know the syntax?
My codes are as follow:
OData.request( {headers: { "X-CSRF-Token" :"Fetch" }, requestUri:queryserviceUriNew, user: uname, password: pword },
function (data, response)
{
//Success Callback (received data is a Feed):
alert("Retrieved.");
alert(response);
// This is the object that hold the response, I need to capture the header value for "x-csrf-token"
}
Thank you experts!
In case there's someone else looking for the answer, the syntax is:
var header_value;
// variable = variable_hold_httpResponse.headers['header_item_that_you_want_to_get'];
header_value = response.headers['x-csrf-token'];
Cheers!