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#ZEN

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Zen is a school of Mahayana Buddhism that originated in China during the Tang dynasty as Zen Buddhism. Zen school was strongly influenced by Taoism and developed as a distinct school of Chinese Buddhism.

In InterSystems Data Platform Zen is a name for MVC web application framework for rapid software development.

Documentation.

Question
· Sep 1, 2021
AWS SSO Login

Hello,

We are using AWS SSO authentication in our application to validate the users. For validating the users, we are passing the username and password from AWS SSO to our application. We need to validate the user in our application without using the password.

We developed the login class using zenPage. We used <loginForm> tag in the login page which is used for the automatic validation.
Is there any possible way to achieve this?

Thanks in advance.

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I have a tablepane in my Zen page that is tied to a class query. When the page first loads, the table is empty. A button onclick event causes the tablepane query to execute and load query results into the table. I want an onchange event from a datalistbox to clear the tablepane so that it looks empty as it was when the page first loaded. I have had no luck fiddling with javascript in the datalistbox's onchange.

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Question
· Dec 27, 2016
Annotating PDF files

I've been asked to annotate a PDF file (in Intersystems Cache). That is, take in an existing PDF (printable form with areas for people to write in) and use Cache to update it (automatically fill the fields in).

Does Zen have the ability to set a starting/initial PDF? I see the ability to define an XML format to write in, but that's not exactly what I need, because that will generate my "answers".

I'd like to overlay my "answers" on top of an original PDF. Do you know how to do that?

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There is a finite list of date formats that users want to use to enter a date in a form. These formats include single digits for month and day and double digits for year. The field is represented by a dateText control.

How would one get to allow a dateText control to accept multiple date formats ? I see only 3 listed here, do those include using single digits for month and day ?

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Question
· Jul 31, 2018
Use Fallback CSS mode

Hi everybody,

we have some legacy ZEN applications build upon CSS2 style definitions. We moved the application due to an upgrade to a newer version of cache (2017.2.1). Anyway I have in mind that in one of the prior relases css3 style interpretation was enforced by ZEN and you could explecitly tell the framework to use CSS2 by setting a global. Anyway I can´t found any hints in the docs on that. Does anyone of the %ZEN gurus have this in mind?

best regards,

sebastian

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Is there a way for web application to set its session timeout value according to the user role or other criteria?

In this case, I have a custom production monitor page, and I want to set 5 minutes for most users but allow managers a longer time or those displaying pages on a monitor a longer time.

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I have edited the Clinical Viewer portal.

I made a new timeline with Patient Encounters. Did this using a external javascript outside Zen Component used for current chartbook.

So, i need to call function inside Zen Component. When i choose any encounter in current timeline is invoked a function, is name is SelectOneEp(' PatientID HERE ',''), i need help how to invoke this method in Zen Component estructure.

I already did the call from external JavaScript.

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Hi,

I would like to set the report headerHeight dynamically based on a group records count.

Example:

If GroupA has 5 records then the headerHeight should be 50mm

If GroupA has 3 records then the headerHeight should be 30mm

Could you please advice the best approach to achieve this?

Thank you,

Rui

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Article
· Dec 12, 2019 2m read
Creating Portlets in DeepSee

What is a portlet?

The simple answer is: a custom widget. A portlet can exist by itself on a DeepSee dashboard, it can be used along side standard DeepSee widgets, or along side other portlets. The rendering of the custom widget is completely user defined. This means you can embed a web page, create a form to perform any sort of action needed based on the data on your dashboard, use third party charting libraries, or simply display data from outside of a DeepSee cube.

How to get started

Open Exchange app
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Hi everyone

I have a datacombo that displayes value from a db table.

I would like to set one of this value as default value. How can I do that? Is there a way to say selected value given the text or the Id from the DB table?

Thanks a lot and kind regards

Milena

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Hi,

We maintain a few Zen reports that output in Excel format.

Recently we started to observe that some reports fail and return the following error.

CSP error occurred
Error: Error rendering: OS code =1Use $log=1 to check
ErrorNo: 5001

I have extracted the exception details from the log file

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Article
· Feb 14, 2017 1m read
Can you keep a secret?

If you are developing applications that use CSP or Zen, or potentially any of the other InterSystems web-related stuff that's built on top of CSP, then it's important to know how to keep one particular secret.

A central part of the CSP security architecture is a server-side session key. "Server-side" because its value should never be revealed to the client that is issuing the web requests. If it is revealed, a malicious client might be able to use it to bypass your security and make your server do things you don't want it to.

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This code snippet provides a ZEN page that downloads a stream from its database directly:


/// We assume that you have stored your data within this schema:
/// MyApp.Model.Storage: Filename,FileSize,Content,ContentType
Class zen.downloadStream Extends (%ZEN.Component.page,%CSP.StreamServer)
{
 
    /// Wrapper to get the id of the download, we assume that the id is passed to this zen page
    /// as a URI parameter, i.e.: MyApp.Downloads.cls?OID=1234
    ClassMethod GetId()
    {
        Quit $Get(%request.Data("OID",1))
    }
     
    /// Set the appropriate header for the file.
    ClassMethod OnPreHTTP() As %Boolean
    {
        Set tId = ..GetId()
     
        If ##Class(MyApp.Model.Storage).%ExistsId(tId) {
            Set tStream = ##Class(MyApp.Model.Storage).%OpenId(tId)
            // You could "guess" the content type by its file extension
            // or you can store it (before) in the database separately (like in this example).
            // Set Extension = $Piece(tStream.Filename,".",$Length(tStream.Filename,"."))
            // Set ContentType = ..FileClassify(Extension)
     
            Set %response.ContentType = tStream.ContentType
            Do %response.SetHeader("content-disposition","attachment; filename="_tStream.Filename)
            Do %response.SetHeader("Content-Length",tStream.FileSize)
        }
        Else {
            Set %response.Status="404 File Not Found"
            Quit 0
        }
        Quit $$$OK
    }
     
    ClassMethod OnPage() As %Status
    {
        Set Download = ##Class(MyApp.Model.Storage).%OpenId(..GetId())
        Do Download.Content.OutputToDevice()
        Quit $$$OK
    }
 
}

Link to code on GitHub

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Hi,

I want to create a table with a dynamic display of data using the DataGrid.

On the page there dataCombo and the table.

According to the plan, when the user selects an item in dataCombo the table is filled with data. If select another item - data is updated.

But in fact, the data in the table are loaded once when the page is loaded, and when I select value in DataCombo, I receive an error:

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Hi All,

Actually, I'm developing few restful API's. I want to create a authentication tokens and display it on my login restful API. If I'm using CSP sessionId, how can I validate the session Id's in another or continues restful API's. else, is there any other approach to handle this task.

My Primary goal is, I have to integrate 2 different front end applications. One is Zen framework another one is web pages from Python.

If any lead, it would be appreciated.

Thanks,

Arun Kumar Durairaj.

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Question
· Jun 24, 2022
RowSpan

What is the correct way to specify rowspan and colspan in a ZEN PDF report using <Item> <Caption>

I am specifying rowspan in the <Caption> tag after the <Item> but it's not working.

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Question
· Sep 8, 2023
Viewing stored images

Hi Guys,

In my Zen page I've a grid with a list of uploaded images and it's working fine when running from the Server where the application resides where I can just click to an image and my code displays the image in a second screen (MSDS.Image.StreamServer.cls) ,

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