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#Object Data Model

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An object data model is that data or code is composed of modules that combine data and procedures that work on the data.

Learn more.

I was looking at the OrefToArray^%occRun in the %CSP.ErrorLog page in version 2016. However, we're on version 2014, and that method does not seem to exist yet. I would love a good way to swizzle out the info in the %request, %session, %response objects for the error log for my own error page, in version 2014. I don't want to have to go through and get all the properties manually, but I will if I must. Any other good way already written?

Thanks,

Laura

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Hello All,

I have a question / issue regarding the calling list.FindOref(<object from indexOpen call>)
Here is a simple way to reproduce the issue:
2 classes: Utility.contacttypes and Utility.person
*************************

Class Utility.contacttypes Extends %Persistent
{
Property description As %Library.String(TRUNCATE = 1);
/// Index for property description
Index descriptionIndex On description [ Unique ];
}

*************************

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Hi

I have an Ensemble Application with many classes and relationships between those classes.

I need a tool that can connect to Cache/Ensemble and create a visual ERD from the class definitions within a particular Cache Namespace

MS-Access is one option but it does not automatically create the relationship connectors between classes

Any suggestions

Nigel Salm

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Hi!

I'm trying to insert a relationship from a parent object instance to a child object instnace programmatically. Ie, i want to do:

Do parentObject.childRefProperty.Insert(chilDobject)

where childRefProperty is defined by a string. I feel this should be achievable with $PROPERTY and/or $METHOD or maybe something in $SYSTEM.OBJ.*, but can't quite figure it out. Anyone know?

Cheers :)

Chris

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Question
· Apr 17, 2017
Overide trigger

Hello everyone.

I have some issue with trigger. I have class where I defined 3 triggers (UPDATE, INSERT, DELETE). These triggers are Foreach = row/object. In my currently task, I need overide this triggers in children class. is It possible to do it?

Thank you for your help.

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With help from others here I had developed some code to take a Base64 PDF within a OBX.5 and save it locally to the file structure on the server.

I had to make a change to the code to return me a String so I can pass the Path back into Ensemble to use it in the message. When I made this change I am getting " ERROR #5034: Invalid status code structure ("/ensemble/data/transfer/AncillaryPDF/TMSAUDIO/Apr-11-1/980512729TMSAUDIO1046784936436537800.pdf")"

Here is the code...

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There is a large file that needs to be processed, with over 500 000 rows. Each row needs to be verified for various data and then all the results collated and reported into a single report. What is the most efficient way to do this? I tried calling the processing function with Job , where each function jobbed off would report results to a different node of a common global. But the jobbed functions are not updating their respective rows even though I am passing the global name and root node. What is the most efficient way to process this large file?

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Question
· Mar 24, 2017
Convert to JSON string

here is my $ZV string "Cache for Windows (x86-64) 2016.2.1 (Build 803) Wed Oct 26 2016 12:43:35 EDT"

two questions

1. How do i convert any Persistent object to JSON String ?

2. How do i convert an y Register object to JSON string ?

3. Do i need to extend from any adaptor class for 1 & 2 ?

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Can you create ad-hoc Caché relationship objects that are not part of the original Caché class definition? One of the drawbacks with relationships is that that the more relationships you have defined, the more difficult it can be manage. I was wondering rather than having all your relationships defined in the Caché class, could you programmatically create relationships between classes as and when they are required?

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Question
· Mar 26, 2017
How to split an xml into 3 xml

Hi,

I have a xml stored in a globalCharrachter Stream.

I would like to get a full node parts of the xml to store it in an other file.

Exemple of an Xml store in cache

<doc>
<header></header>
<product></header>
<market></marker>
<doc>
</aaa>

I would like to generate new xml from this one like

<product></product> to product.xml

<market></market> to market.xml

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Goal:

  • Take an HL7 message, parse some data from it
  • Call a web service to get an authorization key, comes back as a simple string
  • Create a request object with data from the HL7 message and send it to the Web Service

The main web method call requires that key I received as a Soap Header element. All I can pass to the SOAP Operation business class is the request object with the data I plucked from the HL7 payload. Nothing in that particular request message has anything in it that tells anything to send the header, too.

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Let's say I have two classes: A and B. They share no common parent except %SystemBase. But these classes have some properties with the same name (type may be the same or not):

Class A {

Property data As C;

Property data2;

}
Class B {

Property data As D;

Property data3;

}

I need to automatically convert object of class A into object of class B. I'm planing to write a class generator that generates a separate class that converts A to B. It would work like this:

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Overview

Encryption of sensitive data becomes more and more important for applications. For example patient names, SSN, address-data or credit card-numbers etc..

Cache supports different flavors of encryption. Block-level database encryption and data-element encryption. The block-level database encryption protects an entire database. The decryption/encryption is done when a block is written/read to or from the database and has very little impact on the performance.

With data-element encryption only certain data-fields are encrypted. Fields that contain sensitive data like patient data or credit-card numbers. Data-element encryption is also useful if a re-encryption is required periodically. With data-element encryption it is the responsibility of the application to encrypt/decrypt the data.

Both encryption methods leverage the managed key encryption infrastructure of Caché.

The following article describes a sample use-case where data-element encryption is used to encrypt person data.

But what if you have hundreds of thousands of records with an encrypted datafield and you have the need to search that field? Decryption of the field-values prior to the search is not an option. What about indices?

This article describes a possible solution and develops step-by-step a small example how you can use SQL and indices to search encrypted fields.

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A method to convert certain non-readable ASCII characters in a %Stream.FileCharacter object first copies it into a %Stream.FileBinary object and then loops through each character one at a time to find and convert these offensive characters to our interpretation of their readable ASCII equivalents . The loop is sequential (while 'bStream.AtEnd) and is taking too long for large files.

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Hi,

I am saving 2000 objects of a class in a loop.

In one environment it is taking a total of 86 seconds and in another environment it is taking 0.55 seconds.

The code (the class and the code for save) is same for both the environment. I have Ensemble 2012.1.5.956

Can somebody help me to identify the cause of the discrepancy. Is there any memory or any other setup which may cause the problem.

Thank you in davance,

Susobhan

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Article
· Mar 2, 2017 1m read
Trusting the code you import

As more people join Developer Community, and with increasing efforts to promote code sharing, I'd like to draw fresh attention to this post I wrote a year ago. It spotlights a feature within the class compiler which is both useful and dangerous. When importing code (e.g. from an XML export of classes received from someone), it's worth considering the risks.

Even if that post doesn't seem relevant to you at the moment you may wish to note it for the future. A handy way of doing this is to click the star icon at the end of it.

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Hi!

Consider I have a class Package.Data with Property UniqueStringValue as %String.

I introduced the Index for this property:

 Index ValueIndex on UniqueStringValue [Unique];

It works well. But if I try to check if there is an object with the certain value in code like this:

if ##class(Package.Data).ValueIndexExists(value)

this expression fails, if value="value", even if there is an instance with instance.UniqueStingValue="Value"

How can I set the index to prevent saving case sensitive values in this class?

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