Wakanda Forum - General Discussion

What happens if internet connection is broken during CRUD operations?

aurelv — Wed, 19 Jun 2013 06:24:14 GMT

If internet connection is broken during CRUD operations:
1. NoSQL database will be broken?
2. WAF warns that they could not perform CRUD operations or needs us to create events?
3. After restoring the connection is enough replay CRUD operations?

Wakanda borrows from 4D?

aurelv — Tue, 18 Jun 2013 21:47:07 GMT

How can you make such complex and well structured product?

Wakanda database integrity - NoSQL vs. MySQL

aurelv — Tue, 18 Jun 2013 21:29:26 GMT

What about Wakanda database integrity?

How can we protect Wakanda source code applications from clients?

aurelv — Tue, 18 Jun 2013 11:25:52 GMT

Is it possble to protect Wakanda source code applications from clients?

dynamic binding for Web Components

franco.tiveron — Tue, 18 Jun 2013 11:00:05 GMT

Hello.
I'm trying Web components. Is there a way to dinamically bind a web component to an existing data source? I tried:

this.load = function (data) {
this.sources.set = data.userData.src;
.
.
.

where userData.src is sources of the embedding page. This doesn't give errors, but neither works as expected.

Could you help. please?
Thank you.

Wakanda installation on webfaction server

x_titanium_x — Tue, 18 Jun 2013 06:44:51 GMT

Hi some one can help me in installing wakanda on webfaction server? i got this reply:

It appears the installation of Wakanda is not straightforward on CentOS Linux, which is the operating system on our servers. Please refer to the following infos:

According to the system requirements on Wakanda's download page, they are providing a binary distribution that requires "Linux Ubuntu distribution (LTS) 10.4 or above". So, what's probably happening is that the binary requires libbsd.so.0 and CentOS doesn't provide it.

It turns out I'm running Xubuntu 12.04 locally, so I tried running it on my local machine, and it works; it's using /lib/x86_64-linux-gnu/libbsd.so.0`.

This is essentially why on Windows and Mac you see so many binary distributions of software, but on Linux, source distributions of software are more popular. Linux itself is a kernel, and different operating systems will have different libraries, so you either have to (1) make many binary software downloads, (2) choose to support only one or two operating systems, or (3) just distribute the source code instead. Most people opt for (3).

Wakanda does have source code on its github page, but doesn't seem to offer much in the way of a single tarball with a simple build process.

As an aside, the most popular operating system for application servers is RedHat Enterprise Linux (or, similarly, CentOS), so it would be somewhat expected that if Wakanda was providing binary executables for Linux, they would at least provide one for the latest stable RHEL. But, they don't.

What can be done? I haven't tried it for Wakanda, but I bet you could get it running by copying all of the necessary libraries to something like $HOME/lib/ubuntu_libs, and then export LD_LIBRARY_PATH="$HOME/lib/ubuntu_libs" . Something like patchelf might work as an export replacement, by modifying the ELF binary's internal rpath.

I'm an end user of OS so I didn't know linux, someone can help me in installing wakanda there?

Best regards
Sincerely

Carlo

Why Wakanda isn't Windows XP compatible?

aurelv — Tue, 18 Jun 2013 05:36:28 GMT

Why Wakanda isn't Windows XP compatible?

I like Wakanda. It's a dream.

aurelv — Mon, 17 Jun 2013 21:05:02 GMT

Today I (re) discover Wakanda after 1-2 years. It's a dream. I hope I did not wake up.

Has memory leaks/consumptions been addressed in Studio version 4 and beyound?

BenHayat — Sun, 16 Jun 2013 21:28:01 GMT

Hello Wak Team;

During my app development in Wak3, the major reason I had to stop, was because the studio could simply not handle any page that had many and complex layout and widgets, in particular the "Tab" widgets with 10 pages and each with many combo boxes.
I had provided lots of info to team regarding these memory leaks, especially when widgets were being moved around and studio would crash. By then, I had reached the limit and that was only 20% of my project.

My question to team is, have you fixed all these memory leaks? and secondly, I don't see the Tab widget is being re-written in the Roadmap. What's the story with the status of Tab Widget?

I need to start planning when I can re-start from ground up again, but with the assurance that Studio is working now.

Thanks!
..Ben

Hosted Questionaire with Skip Logic

McMahon@Driven-Inc — Fri, 14 Jun 2013 22:36:21 GMT

Hey there Wakanda Forum,

I'm looking to develop a questionnaire that I can host and have skip logic (or conditional questions) involved. I know that SurveyMonkey can do it, but I need to host this myself because I will have to eventually run private instances (different Wakanda Servers) for a few large select clients (where each project will have it's own questionnaire.

My goals are the following:

- Have pages with 5 to 15 questions. When the user clicks Submit & Next, the next set of questions (5 to 15) are selection based on the answers of the first set.

- Users will only have access to their questionnaire (per client, then per project).

- Once complete and submitted, a report of the answered questions will generated as PDF, automatically emailed to a predetermined email.

- Analytical reports can be run across all answers, broken down by Client, Project, etc. To determine trends within the data.

- I will have a default set of questions, but then I need to be able to add/delete based on the individual client and/or project. I'd like to be able to add/delete groups of questions (not have to do it individually).

Any thoughts? Is this something that can be easily accomplished in Wakanda? Suggestions?

THANKS!

-H

Primary key isn't created...

Sylvain — Wed, 12 Jun 2013 19:50:42 GMT

Hi,
I imported data from mysql, I define a primary key with an existing field. When I make a addnewelement, my key isn't created automatically is this normal.

Thank for your help.

Best regards.

Sylvain

Handler is not a function error

oky — Wed, 12 Jun 2013 15:16:34 GMT

I got this error on MacOS X 10.8.4, Wakanda v5 build 5.135161 (64 bit)
The same solution has no problem on Windows 7 64 bit (using same build of wakanda).

Attachment 2792

This error show up when loading a page. This page is the login page as shown below.

Attachment 2793

Below is the code for the page.

Code:

WAF.onAfterInit = function onAfterInit() {



// @region namespaceDeclaration

        var documentEvent = {};        // @document

        var btnSignOut = {};        // @button

        var btnSignIn = {};        // @button

// @endregion



// eventHandlers



        documentEvent.onLoad = function documentEvent_onLoad (event)

        {

                //debugger;

                if(WAF.directory.currentUser() !== null){

                        //curUser = WAF.directory.currentUser().fullName;

                        $$('btnSignIn').hide();

                        $$('tfLogin').hide();

                        $$('tfPassword').hide();

                        $$('rtMessage').setValue("Logged in as " + WAF.directory.currentUser().fullName);

                        $$('btnSignOut').show();

                } else {

                        $$('tfLogin').show();

                        $$('tfPassword').show();

                        $$('btnSignIn').show();

                        $$('btnSignOut').hide();

                }

        };



        btnSignOut.click = function btnSignOut_click (event)

        {

                //debugger;

                WAF.directory.logout();

                $$('tfLogin').show();

                $$('tfPassword').show();

                $$('btnSignIn').show();

                

                $$('tfLogin').setValue("");

                $$('tfPassword').setValue("");

                $$('btnSignOut').hide();

                $$('rtMessage').setValue("");



        };



        btnSignIn.click = function btnSignIn_click (event)

        {

                //debugger;

                var loginName = $$('tfLogin').getValue();

                var thePassword = $$('tfPassword').getValue();

                

                if (WAF.directory.loginByPassword(loginName, thePassword)){

                        if (WAF.directory.currentUserBelongsTo("admin")) {

                        //curUser = WAF.directory.currentUser().fullName;

                        $$('btnSignIn').hide();

                        $$('tfLogin').hide();

                        $$('tfPassword').hide();

                        $$('rtMessage').setValue("Logged in as " + WAF.directory.currentUser().fullName);

                        $$('btnSignOut').show();

                        };

                };

        };



// @region eventManager

        WAF.addListener("document", "onLoad", documentEvent.onLoad, "WAF");

        WAF.addListener("btnSignOut", "click", btnSignOut.click, "WAF");

        WAF.addListener("btnSignIn", "click", btnSignIn.click, "WAF");

// @endregion

};

Below is content of required.js

Code:

function myLogin(userName, password){

        debugger;

        var myUser = ds.User({login:userName});

        if (myUser === null) {

                return false;

        } else {

                // we will handle login

                if (myUser.validatePassword(password)) {

                        var theGroups = [];

                        switch (myUser.accessType) {

                                case 1:

                                theGroups = ['Internal'];

                                break;

                                

                                case 2:

                                theGroups = ['Administrator'];

                                break;

                                

                                case 3:

                                theGroups = ['Manager'];

                                break;

                                

                                case 4:

                                theGroups = ['Employee'];

                                break;

                        }

                        var connectTime = new Date();

                        return {

                                ID: myUser.ID,

                                name: myUser.login,

                                fullName: "guest " + myUser.fullName,

                                belongsTo: theGroups,

                                storage: {time: connectTime}

                        }

                } else {

                return {error: 1024, errorMessage: "Invalid login"};

                }

        }

}

Code:

// startup.js

directory.setLoginListener('myLogin');

Thanks in advance

Attached Images

Screen Shot 2013-06-12 at 9.51.53 PM.png‎ (61.6 KB)
Screen Shot 2013-06-12 at 9.57.58 PM.png‎ (16.0 KB)

What are the issues related to using Wakanda in Microsoft's world

nik — Wed, 12 Jun 2013 05:46:26 GMT

While the title may insinuate that I am asking for troubles, that is not the case. I am quite impressed with Wakanda as likely the best environment for development of sophisticated JavaScript applications. At the same time all my clients are firmly attached to Microsoft's "stack" (ASP.NET MVC / HTML5 / IIS / Azure).

So, my question is simply this: assuming that I can prove to my clients the technical prowess of Wakanda, what kind of problems can I run into while developing parts of my solutions in Wakanda. As an example, I will use our Health Record Bank application which is ASP.NET Web Forms app, using Microsoft's HealthVault as data storage with an intermediate SQL database which being bidirectionally synced with HealthVault acts as a proxy that eliminates the network latency issues.

The same question stated differently: would I be better off extending my solution by using a more MS centric approach like KendoUI, or would Wakanda offer equally good services in my situation?

Thanks in advance

CRUD + ComboBox

YvesWak — Sat, 08 Jun 2013 14:30:35 GMT

Hello everyone

What's the best way to do CRUD with a combobox? Do you have an example.

Thank you for this beautiful product:RpS_biggrin:

Best regards

Yves

Templating in wakanda server

Mohamed Idrissi — Fri, 07 Jun 2013 17:51:24 GMT

Hello Wakandians,

I have created a module that uses underscore to generate pages/scripts from the server.

I have published a demo solution to github

This is how to use the demo:

Clone the solution from github or just download it and open it with wakanda
Run the file "_tmp/fill.js" to generate the data
Run the "runMe.js"
And finally, open this url: http://localhost:8081/pages/page.ssjs

Notice that the file "page.ssjs" does not exist in the webFolder (It's in the Templates folder!), and the content of that file, is simply an underscore template that is executed on the server side:

HTML Code:

<% ds.Comment.forEach(function(entity){%>

        <%= entity.user %>

        <%= entity.comment %>

<%});%>

The "ssjs" module gives direct access to http request and response objects.
As an example, the file "Templates/scripts/script.ssjs" rewrites the content type of the response, and generate a js file that we can inject into an html page. To see the result, just launch the test.html page (In the webFolder).

This is the content of the "script.ssjs" file:

HTML Code:

<% response.headers['Content-Type'] = 'text/javascript'; %>

var array = <%= JSON.stringify(ds.Comment.toArray('user')) %>;

Please contact me if you have any question.

Server User's Session Expiration

avac2005 — Thu, 06 Jun 2013 23:24:14 GMT

Hi Wakanda Team,

Do you now, if there is any server event that it fires just after of server's user session expiration ?

BR/Antonis

Marketplace?

ilemona — Thu, 06 Jun 2013 17:36:02 GMT

Is there a Wakanda market place where one can find developers skilled in Wakanda?

wak 5 and sql to 4d v12, does this work, anyone tried?

vegarringdal — Wed, 05 Jun 2013 08:53:55 GMT

wak 5 and sql to 4d v12, does this work, anyone tried?

Solved Roadmap

Ronald Pfitzer — Wed, 05 Jun 2013 04:59:46 GMT

I am missing the update of the roadmap announced for yesterday.

Ronald

Perhaps this happens in California :RpS_rolleyes:

Question about the Wak5 Matrix widget

portis40 — Tue, 04 Jun 2013 00:25:46 GMT

In Wak4 when you dragged a datasource (pointing to a datastore class on the server) onto a matrix, you got the matrix autofilled with Text fields.

In Wak5 when you drag a datasource onto a matrix you get a bunch of little pseudo-grids, complete with title and navigation bar? (Why? And is the documentation to be updated soon?)

Some Feedback

t316 — Fri, 31 May 2013 20:22:20 GMT

I am very new to wakanda but I am very experienced in IDEs, tools, languages, javascript, etc., so conceptually I felt right at home with wakanda from the very first moment. Wakanda's paradigm is wicked cool. Well done.

However, as incredibly powerful and agile wakanda is conceptually, I am encountering so many bugs and quirks that within one day I started to question whether I should use it.

To be fair I am using the dev release (downloaded yesterday). So, this might explain the quirks - they are in a number of different categories:

1) ds.Airport.find and ds.Airport.query don't consistently work. something as simple as ds.Airport.find("Code = :1","BED") pulls data only sometimes.
2) the google map is quirky - the zoom and pan work only sometimes
3) Saving a file sometimes doesn't update the rendered html
4) The server side debugger is flaky - it gets stuck and doesn't update the code when the code is changed.
5) The UI designer is very flaky - I click items on the designer surface and sometimes I just can't select something.
6) Grid column before and after vertical separators do not align with the ones in the rows.
7) There are some small pauses in responding to clicks in the designer. It makes the developement process feel slow.
8) I am not seeing intellisense in the editor. This is a huge loss for me as this how I quickly learn things.

The list goes on and on. In all fairness - what I was able to accomplish in half a day is pretty incredible. I loaded airport data from the FAA with lats and longs and built a great circle distance calculator which in a class method returns airports within a certain radius distance of a given/selected airport. The results are displayed in a grid and mapped on the google map. The javascript method for the distance calculator runs in a serverside where clause and runs in under a second for 20,000 records. Nice!

The taste I got from wakanda is delicious, but I am torn about the productivity thing given so many issues.
Can this have to do with me using the v5 dev build?

Please help me understand if I am doing something wrong. I am willing to send my project to a wakanda employee in a private message...

Wakanda V5 - Issues

nguyenhung77478 — Fri, 31 May 2013 14:47:07 GMT

Hi,

I just downloaded V5 and it failed to start with the same error I had for long with DEV versions.
Not sure why and how to fix it.
It's really frustrated unable to use it

Attachment 2755

Maybe Tech team get involved to resolve this.

Regards,
Hung

Attached Images

Wkd_v5.JPG‎ (28.7 KB)

How do I stop a running script?

t316 — Fri, 31 May 2013 12:19:00 GMT

As in the instructions for importing data I have a script that parses line by line an import file.

As I am doing quick prototyping, I notice things that are wrong in the script (like misaligned columns etc) and want to stop the script and re-run it.

Firstly, I can't figure out what UI action stops the script (it opens chrome in debug mode which is great but how do I stop this script?).

I have tried just closing chrome and then re-running the script but the execution (breakpoint) is right where the script left before closing the browser. As I fiddle around with pressing the Stop Server button, etc., I am getting "Errors occured while stopping Wakanda Sever with the Test Solution" type of errors.

What am I doing wrong?

Also - how would I go about making the script work with parameters (almost like command line parameters). In the import scenarios, for example, I would want a parameter to indicate whether the delete all records first or just overlay updated records...

setTimeout in entity method

bonjourscott — Fri, 31 May 2013 02:20:38 GMT

The following method is a entity method(scope is public)

Code:

plant:function()

{

        var myCrop = this.cropCollection.find('ID = 99');

        //I have tested the myCrop is right

        setTimeout(myCrop.changeMaturity, 10000);

        wait();

}

the changeMaturity method:

Code:

changeMaturity:function()

{

        this.maturity = 99;

        this.save();

}

My question is that the sentence

Code:

this.save();

does not work, the debugger show the below picture:
Attachment 2757

Can anybody give some tips, Thx in advance.

Attached Images

12123.jpg‎ (23.1 KB)

Adding onRowDraw listener on dynamically created grid

Jernz — Thu, 30 May 2013 21:27:13 GMT

Hi,

I am creating a grid dynamically in code and I want to have code run using the onRowDraw event. My problem is that the datasource is defined when creating the grid and the rows are all drawn before the onRowDraw event is defined. Can someone tell me how to A) assign the datasource (and columns) after the event is defined, and then draw the grid rows, or B) just refresh the grid to redraw all the rows after defining the event.

My code is below. Thanks.

Code:

    

 var componentWidget = new WAF.widget.Grid({

          'id': 'comp_' + domID,

          'data-type': 'grid',

          'data-lib': 'WAF',

          'data-binding': dataBindingValue,

          'data-column':dataColumnValue,

           'data-constraint-top': 'true',

          'data-constraint-right': 'true',

          'data-constraint-left': 'true',

          'data-constraint-bottom': 'true',

          'class': 'waf-widget waf-grid default inherited',

          'data-readOnly':'true'});



$$('comp_'+domID).addListener('onRowDraw',function(e) {

                                var html = '' + e.row.cells[4].value + '
';

                e.row.cells[4].insideCell.html(html);

        });

Can the journal file be backed with Volume Shadow Services while wakanda app is running without performance degradation?

t316 — Thu, 30 May 2013 19:09:19 GMT

Can the journal file be backed with Volume Shadow Services while wakanda app is running without considerable performance degradation?

I am asking this because this would allow a single data file backup for the day and regular (every x hours or x minutes) backup of the journal file during the day for differential data during the day...

Also, can a data, model and journal files be xcopy deployed? Meaning, can I take a full live production copy of those files (while the site is running) and copy them in to a dev environment to get an up to date snapshot of the production site for development and debugging purposes?

Thanks

Socket programming

begincolor — Thu, 30 May 2013 07:27:15 GMT

I use the socket for the first time, so I do a basic test about the communication between server and client socket(in the same host, which is localhost).
Here are my codes,

Code:

// the sever side

var net = require('net');

var server = new net.Server();



server.listen(8081, "127.0.0.1", function(socket) { //'listening' event listener

    console.log('server bound');

    socket.write('Hello~');

});



// the client side

var net = require('net'); 

var socket = new net.Socket();

socket.connect(8081, 'localhost', function () {

    socket.addListener('data', function (data) {

        console.log(data.toString());

    });

});



socket.destroy();

Then,I first run the sever code, it returns 'fail to start listener'. Can anybody tell me what's wrong with my code? I know little about the socket usage, so maybe there is some stupid mistakes, please answer it with patience, and tell me more in details if possible. Thanks~

Production / Test Environment

lweidig — Wed, 29 May 2013 21:32:40 GMT

I have been using Wakanda for a few months now and may be getting to a point where I am going to put out our first "live" application. To date I have been doing all of my development on the local machine and running the server on the local machine as well. What are people using for the workflow (I have minimal git experience)?

Here are the issues I am trying to resolve:

1. All my development has been on a 64 bit Windows 7 system. Production will be a Linux based server running on one of our virtual servers. Can I just expect everything to work as it has to this point? At one point I believe the Linux Wakanda server did not have full support as the other OS'es did.

2. How to I do the initial publishing of the system from my development machine to the server?

3. Ongoing, how do I work on changes locally with a local model and then only push out the changes to the live box. Cannot obviously work directly on live as there will be people using it and sometimes (or maybe more than sometimes) I like to break / refactor things.

Other ideas on making the production / development cycle more smooth and seamless?

Thanks!

Comingle external ui component witn wakanda ui

t316 — Wed, 29 May 2013 20:55:10 GMT

If I wanted to add, for example, a wijmo widget in to a wakanda ui page...

a) Is it possible to place it in to a wakanda container or arbitrary div. Can I add custom html to wakanda pages?
b) how do I add the external js and css files
c) what happens when wakanda resizes the page or containing div
d) can I still work inside wakanda (I probably would not see the widget until I run the page - this is fine)
e) how do I pass data from the datasource to the widget (I am ok with brute force iteration for now)
f) is there a video or tutorial for this - looked but didn't see anything

Datagrid looses horizontal scrollbar when it shrinks

nguyenhung77478 — Wed, 29 May 2013 18:08:46 GMT

Hi All,

Not sure why Datagrid looses horizontal scrollbar when it vertically shrinks.
I don't think it's a normal behavior...maybe a bug?

Attachment 2751
Attachment 2752

Attached Images

grid_normal.JPG‎ (139.6 KB)
grid_shrink.JPG‎ (161.7 KB)

Data grouping by multiple fields

t316 — Wed, 29 May 2013 13:59:40 GMT

I am considering replacing an Asp.Net MVC sytem that uses WebApi and hence has fantastic support for rest based querying of data sources. I am fairly sure wakanda matches most of the functionality except for two areas that I haven't seen mentioned:
1) Queries that group data by multiple fields (and sort by the grouped field) and potentially run aggregate functions on the groups.
2) Defining url route patterns that map to different restful queries.

Are these possible? 2) is nice to have and it's absence is not a big problem for me, but 1) is fairly important.

Aligning numbers to the right in grid column

Jernz — Wed, 29 May 2013 03:35:18 GMT

Hello,

I have some grids, and I want to make the data in the number columns align to the right. How can I do this? I can't find anything in the documentation.

A few questions:

t316 — Tue, 28 May 2013 18:14:51 GMT

I am considering using wakanda in a brand new project but have the following questions/concerns - would somebody be kind enough to answer them?:

1) The Current User/Group architecture: Can the user and group entities be extended with additional properties? Can the current user and group entities be linked to other entitites as object properties in the ER designer?

2) Can one use an outside social login service like janrain to do the authentication and tell wakanda that a user has been authenticated (and should become the current user)? The way this would work is a client side javascript component provided by janrain would invoke the social service's login, this would trigger a server side callback in wakanda - there would be enough info at this point to lookup the successfully authenticated user in wakanda and assume it is logged in (but on the server side) and set the current session user to it.

3) Can most of the ui be built with components like wijmo by using wakanda as a datastore and initializing knockout observables with the returned data?

4) Is there a way to parse xml returned from external web services on the server side.

5) Is there a solution to pub/sub like real-time communication between and server and client right now (possibly through other nodejs components)?

6) When is the mysql version of the entity relationship designer coming out? I want the same restful data querying and client side api story going against the same type of ER diagrammed data model, but with the physical implementation of the data model being in mysql.

7) Is there a multi-server load balancing/fault-tolerance story yet?

8) Is the current dev channel (as of 05-28-2013) basically the v5 in the roadmap? When is v5 scheduled for and when is v6 scheduled for?

9) If I had a history of 500 million vehicle position history records and wanted to query the database with a query that semantically equated to: "Get me all the type x vehicles that were within 50 mile radius of city y as of datetime xyz". Such a query would have nuances of doing a query with a where clause based on a computed scalar function (defined in javascript on the server side data model by me) that tells you whether vehicle position is within 50 miles of city y position and further constrains that by a time and vehicle characteristics. Is it possible? How would it perform?

10) If I wanted to build a Single Page Application where any relevant UI state has a matching hashtag url parameter: I know how to do this in a plain javascript SPA with a toolkit like sammy.js. How do I do this in wakanda - preferably can I use sammy js as the dispatcher of hashtag routes which then set the state of the UI?

Thanks

permissions for pages, files and folders

pkesch — Mon, 27 May 2013 07:08:51 GMT

In the docu there is a section about permissions for pages, files and folders:

Quote:

For Pages, files, and folders, the following permissions are available:
All HTTP request methods (GET, POST, PUT, and DELETE)
Note: Currently being implemented and not yet available

It is said that it is currently being implemented.

As I did not see it in the roadmap I am just curious if it is still being implemented or if the implementation has been postponed?

How to calculate the elapsed time？

bonjourscott — Sun, 26 May 2013 08:06:40 GMT

hi all,

I am dealing with a web game, which needs a time system to calculate the elapsed time?

This game considers 4 hours as 1 day.

What is the best solution to establish it?

thanks a lot in advance.

Very strange about query on client-side

begincolor — Sat, 25 May 2013 16:29:00 GMT

I know it's not good to put too much thing here, but some problems really confused me a week that I have to describe the whole scenario here.
Attachment 2737
The thing is that I wanna achieve a shopping cart on client. every time the user click the '+' button, corresponding goods will be accumulated to the local entityCollection of datasource(named shop_cart which has datastore class defined on server,but normally I won't persist any data in it,because all operation on it will be on client).The left grid shown in the picture is bound to the Shop_cart datastore, just for testing use. Here is part of my code:

var myshops=sources.shop_cart.getEntityCollection();

cropsadd.click = function cropsadd_click (event)
{
var cropCurr=sources.crop_model.getCurrentElement(); //to get the current selected item in store, in the current case shown in picture, it is 'corn'.

myshops.query("name==:1",{ params:[cropCurr.type.getValue()], // the query just wanna judge if the selected item has already existed in my shop_cart collection
onSuccess:function(event){
var items=event.entityCollection;
_addShop(items,cropCurr);
}
......
}

function _addShop(items,cropCurr){
if(items.length!=0) // if the item selected has already been added in shop cart at least once,
{
...... // the accumulation realization

sources.shop_cart.setEntityCollection(myshops);

} else{ //if the item selected is adding for the first time
...... // adding new item realization

sources.shop_cart.setEntityCollection(myshops);

}

}

Regardless of the omitted part of code that I ensure there is nothing wrong and myshops is assigned, my problem is every time I click the add button, the event.entityCollection just show nothing, so every time it just add a new item, even if with the same item(in this case, I want them be accumulated, changes on the quantity attibute of shop_cart). The truth is myshops does have the same entities, but the query returns nothing,as displayed below:
Attachment 2739
Thus, I cannot achieve my requirement.

Is there something I don't know clearly about the query method? Besides, I find difficulty telling the difference between entityCollection.query() and sources.datasource.query(), are they actually serve the same purpose?

I realized that maybe my description is not easy to understand, or if there is more easy ways to achieve my shop cart function as what I need, I will be very grateful for those options offered, because I don't even think my approach is a good one, and I got quite a few obstacles to do that.

Attached Images

QQ截图20130525234233.jpg‎ (17.8 KB)
QQ截图20130526003744.jpg‎ (16.1 KB)

question about query in client-side

begincolor — Fri, 24 May 2013 06:07:54 GMT

It's not convenient to bring all my code here, and not very simple to describe the context.But I think there is just some conceptual questions bother me.
The setting is in client, when I do a query on the entityCollection of a bound datastore, I find the query is always based on all entities in datastore class. But I need a query always on current entitycollection in client-side, how can I achieve that? (there is no filterQuery() for entityCollection).
Another thing is about the filterQuery of datasource, how to retrieve the returning entityCollection in onSuccess method? Because the normal way event.entityCollection doesn't work, or specifically,there is no entitycollection in event. So how can I get the result?

Wakanda Image attribute -> Javascript Image Class

alexis85 — Thu, 23 May 2013 21:30:53 GMT

Hello,

I am using Wakanda to do a web multiplayer game and I need to draw an image attribute from dataclass in a canvas. But the image attribute of Wakanda is different from a Javascript Image Class so it's not functional.

I want to know if there is a way in order to use the image Attribute from Wakanda in a Image Class from Javascript.

Thanks for your answers

Sorry for my english, I am French.

question about client-side callback function

begincolor — Thu, 23 May 2013 09:22:00 GMT

This is about entityCollection.query() in client-side. Recently, when I use this function in my project, I feel very confused about the execution sequence of its callback function.As show below:
Attachment 2734
myShops is an entityCollection, and it does contain several entities. But every time the judgement below shows the length is 0. When I debug it, I see the code in onSuccess{} is always executed afterwards, after all subsequent code, so the variable items certainly isn't assigned before the judgement statement. Why? How can I control the the callback function's executing sequence to make the following judgement statement meaningful?

Attached Images

QQ截图20130523171017.png‎ (8.7 KB)

How is the Tech note about generating pdf report using Jasper report going?

wei — Wed, 22 May 2013 20:44:22 GMT

Hi, Wakanda Team,

Saad Mousliki mentioned a Tech Note about using a third party (Jasper report) and a system worker to create PDF report in this thread (http://forum.wakanda.org/showthread....=jasper+report) .

I am wondering when will the tech note be released? thx

Cheers