Though it was working previously, for some reason my code has now stopped working. Though it fetches the required json data, the build doesn't render. The error on my app page which is supposed to display a page view was;
type String is not a subtype of 'Map<String,dynamic>'
But after some tweaks, now the error is;
invalid arguments(s)
I think I may have narrowed it down to the Future;
FutureBuilder<List<SpeakContent>> futureStage() {
return new FutureBuilder<List<SpeakContent>>(
future: downloadJSON(),
builder: (context, snapshot) {
if (snapshot.hasData) {
print("Snapshot has data.");
List<SpeakContent> speakcrafts = snapshot.data;
return new CustomPageView(speakcrafts);
} else if (snapshot.hasError) {
return Text('${snapshot.error}');
}
return new CircularProgressIndicator();
},
);
}
Future<List<SpeakContent>> downloadJSON() async {
final jsonEndpoint =
"http://example.com/getContent.php?";
final response = await get(jsonEndpoint);
if (response.statusCode == 200) {
List speakcrafts = json.decode(response.body);
debugPrint(speakcrafts.toString());
return speakcrafts
.map((speakcraft) => new SpeakContent.fromJson(speakcraft))
.toList();
} else
throw Exception('We were not able to successfully download the json data.');
}
Although it doesn't throw an error, I've noticed that it doesn't print my test statement after the "if (snapshot.hasData)" line.
Shouldn't I see "Snapshot has data." appear in my Android Studio console?
Based on what you provided, this
type String is not a subtype of 'Map<String,dynamic>'
must be this:
return Text('${snapshot.error}');
which means that your downloadJSON() threw an exception. In that case, print('Snapshot has data.'); never executes and the next case that I quoted above is executed.
Please put a breakpoint in the body of downloadJSON(), run it line by line and see what's thrown where.
ALSO, you are making an irrelevant but big mistake here. Do not call downloadJSON() like this. This function is executed at every re-render, which can be many times. You are initiating a JSON download at every redraw of your widget. This may stack up your backend bills... I explain it in this talk in more detail: https://youtu.be/vPHxckiSmKY?t=4771
After performing the troubleshooting tips as suggested by Gazihan Alankus and scrimau, I've found the culprit which was a single null entry in the MYSQL Database. Scary... gotta find out how to prevent that problem in the future.
Related
var a = $v('P1995_LUMBER');
if ((a = '1')) {
apex.submit({
request: "CREATE",
set: {
LUMBER: "P1995_LUMBER",
LST_NME: "P1995_LST_NME",
FST_NME: "P1995_FST_NME",
},
});
} else if (a != '1') {
apex.submit({
request: "Update",
set: {
LUMBER: "P1995_LUMBER",
LST_NME: "P1995_LST_NME",
FST_NME: "P1995_FST_NME",
},
});
} else {
alert("bang bang");
}
Couple of things:
JavaScript's equality check is either == or === (more details here). (a = '1') assign '1' to the variable.
It seems like you're not using the apex.submit process correctly. Typically, you would set the item's value
e.g.:
apex.page.submit({
request: "SAVE",
set: {
"P1_DEPTNO": 10,
"P1_EMPNO": 5433
}
} );
Although, by looking at your JavaScript code, I would say you don't even need to use JavaScript.
Whenever you submit a page, all items on it are automatically sent to the server-side. You can then reference them using bind variables. You could then simply have two process, one for the Create and one for the Update, each having the corresponding insert/update statement using the different items on your page.
Usually what you will see is a page with two buttons for Create/Edit. They will have a server-side condition so that only the correct one is displayed.
Try creating a Form type page (form with report) using the wizard, and you'll see how everything is done.
Without seeing the page and the code you're using it's hard to tell what your issue really is, more details would be required.
That code does not have any sql in it so it is impossible to diagnose why you are encountering a TOO_MANY_ROWS exception. Run the page in debug mode and check the debug data - it should show you what statement is throwing the exception. If you need more help, post a proper reproducible case, not a single snipped of code without any context.
I'm trying to convert an existing Alexa app to Google Actions wherein I need to implement session and persistent data values. My understanding from https://developers.google.com/assistant/conversational/df-asdk/save-data is that conv.data and conv.user.storage are intended for this purpose. However, making any attempt to assign values to either results in the error "Error: Unauthorized, Your client does not have permission to the requested URL", and also a reference to the offending key which points to this in the firebase console log: https://us-central1-hello-world-e37ec.cloudfunctions.net/cf-p7ROQlBMjQId9Cws6XdJBA-name. Similar issues here in stackoverflow seem to indicate that I need to grant the appropriate function to all users, but I don't know which function is being called. I'm new to Google Actions, so apologies if I'm overlooking something obvious. Code is very similar to the example offered on google's doc.
const {conversation} = require('#assistant/conversation');
const functions = require('firebase-functions');
const app = conversation();
...
app.handle('status', async conv => {
conv.overwrite = false;
if (conv.user.verificationStatus === 'VERIFIED') {
conv.user.storage = {};
conv.user.storage.sum = 69;
conv.add(`Alright, I'll store that for next time. See you then.`);
} else {
conv.add(`I can't save that right now, but we can add ` +
`new numbers next time!`);
}
});
I found the answer for this issue. Appears that I was not in the correct area of documentation for the "conversation" object/app. Correct method is described here: https://developers.google.com/assistant/conversational/webhooks#read_and_write_storage.
Using my example
app.handle('status', async conv => {
conv.overwrite = false;
if (conv.user.verificationStatus === 'VERIFIED') {
conv.session.params.sum = 69; //within session
conv.user.params.sum = 100; //across sessions
conv.add(`Alright, I'll store that for next time. See you then.`);
} else {
conv.add(`I can't save that right now, but we can add ` +
`new numbers next time!`);
}
});
For analytic purposes I'd like to keep track on the client side of all the graphql operations (including ie #client ones). I was unable to find appropriate options in the API and wonder if this may be doable on the apollo-client level or may I need to introduce some proxy to intercept the calls by my own?
A custom Apollo link is a way to go.
You can use apollo-link-logger in particular to log all operations to console.
Usage (from docs):
import apolloLogger from 'apollo-link-logger';
// ...
ApolloLink.from([
apolloLogger,
// ...
]);
Note: Place apolloLogger before other links.
Output example:
As the answer from Yuriy was exactly what I was looking for I marked is as accepted answer - Thanks!
Still for the record here is the code doing a job for me - I believe someone may find it useful, also it is worth to show it's simplicity.
It's worth noting that Apollo links are chainable - thus the argument to a link function are operation: Operation and forward: NextLink which is supposed to be called from our link implementation.
let analytics: Analytics; // this is Fabric.io Analytics to be provided by DI
const analyticsLink = new ApolloLink((
operation: Operation,
forward?: NextLink
) => {
const operationType = operation.query.definitions[0].operation;
return forward(operation)
.map((result: FetchResult) => {
try {
analytics.sendCustomEvent(`${operationType}.${operation.operationName}`);
} catch (e) {
console.error('analytics error', e);
}
return result;
});
});
as a bonus we can also catch errors (i.e. to leverage fabric.io crashlytics) by using apollo-link-error (handling of errors in Apollo is a bit more complex);
const analyticsErrorLink = onError((error: ErrorResponse) => {
try {
// it's worth to rethink what we wanna log here
const message = error.graphQLErrors ? error.graphQLErrors[0].message :
(error.networkError.name + ': ' + error.networkError.message);
analytics.sendNonFatalCrash('GraphQL error: ' + message);
} catch(e) {
console.error('cannot report error to analytics', e);
}
});
Finally to compose the links we should put our intercepting implementations at the beginning so we will be able to catch all the GraphQL operations including those marked with #client which are not reaching network link - in my case full link looks like:
ApolloLink.from([
analyticsErrorLink,
analyticsLink,
stateLink,
auth,
http])
Will doing partialupdate() cause code in a data class' onUpdate Handler to run?
I have this setup in the data class:
exports.onUpdate = function(db, obj) {
DB.log.info(obj.ShiftID);
db.Shifts.load(obj.ShiftID)
.then((Shift) => {
DB.log.info(Shift);
if (Shift.User == db.User.me) {
Shift.User = null;
Shift.status = 0;
return Shift.update();
}
})
};
(yes, role 2 for node has permissions to query and update the Shifts data class)
But I am getting zero logs when I make a partialupdate(). Do I need to do a real update query...load the object, modify the data, update()?
Also it seems that this code causes the partialupdate() to not run at all, but when I delete the handler, it starts working again.
Yes, that is currently an unimplemented feature since a partial update can't execute an onUpdate handler since there is no object which can be passed to the update handler.
On the other hand, a partial update can't be executed directly since that will result in a security issue (since your onUpdate handler can contain validation code etc.)
So we currently reject any partial update on a class which has an onUpdate handler because there doesn't exist a way how we can actually validate the partial update against your onUpdate code.
We have planned that you can define an extra onPartial handler where you can take some extra steps before the partialUpdate is executed. But that handler will only get the partial update and not the object itself.
I'm pretty sure that partialupdate() will not cause the onUpdate Handler to run.
When I put the log line in and edit the records using website data manager it does log as expected. Not a big deal, I can just rewrite the query to be a full update.
BUT having any code in there does break partialupdate() which is not good.
Here is the code I'm using that works as long as there is nothing in the onUpdateHandler:
requestShift(shiftID) {
db.ready().then((db) => {
db.Applicants.find()
.where({
"shiftID": { "$in": [shiftID] },
})
.singleResult((applicants) => {
return applicants.partialUpdate()
.add("applicants", db.User.me.id)
.add("photos", this.props.UserData.photo)
.execute()
})
Alert.alert(
'Confirmation',
'Shift has been requested.',
)
this.props.navigation.dispatch(goToFindShifts)
})
}
I've seen a lot of topics about this, but unfortunately I believe that each case is a different case (or most of them), and I really would love some experts opinion about my case in particular since I cannot make my code work even after reading through some of the other topics.
Situation: I am using an Ajax Request call in jQuery to a WebService method I have created in an WebApi project together with a MVC 4 Application.
My WebService controller class looks like the default, like this:
public class AdditionalInfoController : ApiController
{
//GET api/AdditionalInfo
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}
//GET api/AdditionalInfo/5
public string Get(int id)
{
return "value";
}
//PUT api/AdditionalInfo/5
public void Put(int id)
{
string test = "";
}
}
My Ajax Request from jQuery looks like this:
function GetAdditionalInfo(obj)
{
var request = jQuery.ajax({
url: "/api/AdditionalInfo/Get",
type: "GET",
data: { id: obj.id },
datatype: "json",
async: false,
beforeSend: function () {
},
complete: function () {
}
})
.done(function (a,b,c) {
alert("Additional info was retrieved successfully!");
})
.fail(function (a,b,c) {
alert("An error happened while trying to get the additional info!");
});
}
My WebAPIConfig file looks like this:
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{action}/{id}",
defaults: new { id = RouteParameter.Optional }
);
}
}
And last but not least, this is my problem: this error message keeps appearing when I browse the returned data variable in .fail and this is what is written:
"{
"Message":"No HTTP resource was found that matches the request URI 'http://localhost:59096/api/AdditionalInfo/Get?id=1'.",
"MessageDetail":"No type was found that matches the controller named 'AdditionalInfo'."
}"
I would really appreciate it if someone could help me as soon as possible. Thanks in advance!
Best regards,
Mad
Looking at the error looks like Web API is unable to find the controller 'type' AdditionalInfo. Web API uses assemblies resolver to scan through the assemblies and finds out the controller types. In your case for some reason its unable to find your 'AdditionalInfo' controller probably because it has some problem loading the assembly having this controller.
Try the following and see if there are any errors logged in your EventLog. If you notice any errors then probably you should check if your controllers are present in those assemblies.
Make the following change in Web.config to view errors in EventLog
<system.diagnostics>
<trace autoflush="false" indentsize="4">
<listeners>
<add name="myListener"
type="System.Diagnostics.EventLogTraceListener"
initializeData="WebApiDiagnostics" />
</listeners>
</trace>
</system.diagnostics>
In your WebApiConfig.cs, you can do the following:
IAssembliesResolver assembliesResolver = config.Services.GetAssembliesResolver();
ICollection<Assembly> assemblies = assembliesResolver.GetAssemblies();
StringBuilder errorsBuilder = new StringBuilder();
foreach (Assembly assembly in assemblies)
{
Type[] exportedTypes = null;
if (assembly == null || assembly.IsDynamic)
{
// can't call GetExportedTypes on a dynamic assembly
continue;
}
try
{
exportedTypes = assembly.GetExportedTypes();
}
catch (ReflectionTypeLoadException ex)
{
exportedTypes = ex.Types;
}
catch (Exception ex)
{
errorsBuilder.AppendLine(ex.ToString());
}
}
if (errorsBuilder.Length > 0)
{
//Log errors into Event Log
Trace.TraceError(errorsBuilder.ToString());
}
BTW, some of the above code is actually from the DefaultHttpControllerTypesResolver which Web API uses to resolve the controller types.
http://aspnetwebstack.codeplex.com/SourceControl/latest#src/System.Web.Http/Dispatcher/DefaultHttpControllerTypeResolver.cs
Edited:
One more scenario where you could hit this problem is if your controller is nested inside another class. This was a bug which was fixed later though.
Ok, so I believe I found out what was going on. I am not entirely certain, but at least my problem got fixed.
Simply by changing what was inside of the "data" field in the Ajax call and I have created a class for an object in the application to hold the whole data. It seems that for some reason the method could not have the syntax "Get(int ID)".
Instead, I did something like "Get( object)" and in the Ajax Request something like "data: obj.ID" and voila, it worked.
Also, since the framework is picky about the names of the REST methods (Get, Post, Put and Delete), I changed the name of the method to something else (like Retrieve or something).
Hopefully this will help someone in the future as well.
Best regards,
Mad
Be sure that you have the same parameter names in your methods (int id) as well as in your WebApiConfig/RouteConfig. Try it by changing
public string Get(int id)
{
return "hello";
}
to
public string Get(int? id = null)
{
return "hello";
}
I had the same problem. with me it happens due to a crush in the visual studio (2012). I had the controller file open in visual studio but it wasn't a part of my solution - I couldn't find him in the controllers directory in the solution explorer.
I just added the file to the solution by right clicking on controllers directory => add => existing item.
that fixed the problem for me.
if that doesn't work maybe try to delete the controller and add a new one with the same code . . .