Object Data Model

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Hello!

This article is a small overview of a tool that helps to understand classes and their structure inside the InterSystems products: from IRIS to Caché, Ensemble, HealthShare.

In short, it visualizes a class or an entire package, shows the relations between classes and provides all the possible information to developers and team leads without making them go to Studio and examine the code there.

If you are learning InterSystems products, reviewing projects a lot or just interested in something new in InterSystems Technology solutions — you are more than welcome to read the overview of ObjectScript Class Explorer!

Last comment 20 hours 17 min ago
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When I start talking about InterSystems IRIS with more technically-minded people I always talk about how at the root of things it is a multimodel DBMS.

In my opinion that is the main advantage (on the DBMS side).

You want some sort of summary for your data? Use SQL!

Do you want to work extensively with one record? Use objects!

Want to access or set one value and you know the key? Think again. Use globals!

And the data is stored only once. You just choose the way you want to access it.

On the first overview it's a nice story - short and concise and it gets the message across, but when people really start working with InterSystems IRIS the questions start.

How are classes and tables and globals related? What are they to each other? How's data really stored?

In this article I would try to answer these questions and explain what's really going on.

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Hi all,

 

we are wondering if anybody has a reporting tool that is capable using IRIS Objects?

I know there are things like Crystal Reports and others out there who can read the SQL Data throug ODBC but we need the capability of using object methods while running the report.

Since now we where using a JAVA based report generator (ReportWeaver) but since the object binding for JAVA doesn't exist anymore in IRIS data platform, did any of you have an alternative report generator?

 

Looking forward to any answers

 

cheers

Stephan

 

Last answer 6 days ago Last comment 3 days ago
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Hey Intersystems-Developer,

 

I have already used that and know its possible, but can't find it anymore :(

 

I need dynamic access on proxy objects. For example:

set key = "lastName"

set name = obj.name

set lastName = obj.key <- Not possible 

set lastName = obj.GetAt(key) <- Not possible

 

How can I get access to that object with my dynamic variable "key" ?

 

Best regards. 

Last answer 10 days ago Last comment 10 days ago
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Hi guys!

As you know there are two (at least) ways to get the stored value of the property of InterSystems IRIS class if you know the ID of an instance (or a record).

1. Get it by as a property of an instance with "Object access":

ClassMethod GetPropertyForID(stId As %Integer) As %String

{

set obj=..%OpenId(stId)

return obj.StringData

}

2. Get it as a value of a column of the record with "SQL access":

Last answer 29 June 2019 Last comment 6 July 2019
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InterSystems IRIS 2019.1 has been out for a while and I would like to cover some enhancements for handling JSON which might have gone unnoticed. Dealing with JSON as a serialization format is an important part of building modern applications, especially when you interact with REST endpoints.

Last comment 4 July 2019
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Have some free text fields in your application that you wish you could search efficiently?  Tried using some methods before but found out that they just cannot match the performance needs of your customers?  Do I have one weird trick that will solve all your problems?  Don’t you already know!?  All I do is bring great solutions to your performance pitfalls!

As usual, if you want the TL;DR (too long; didn’t read) version, skip to the end.  Just know you are hurting my feelings.

Last comment 10 May 2019
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I have a lot of string properties, which need custom but similar Getters and Setters.

Currently I'm generating Getter and Setter in class generation code but that expands class definition.

Is there a way to specify custom datatype which would generate custom getters and setters?

Last answer 9 April 2019 Last comment 10 April 2019
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How Tax Service, OpenStreetMap, and InterSystems IRIS
could help developers get clean addresses

 

Pieter Brueghel the Younger, Paying the Tax (The Tax Collector), 1640

 

In my previous article, we just skimmed the surface of objects. Let's continue our reconnaissance. Today's topic is a tough one. It's not quite BIG DATA, but it's still the data not easy to work with: we're talking about fairly large amounts of data. It won't all fit into RAM at once, and some of it won't even fit on the drive (not due to lack of space, but because there's a lot of junk). The name of our subject is FIAS DB: the Federal Information Address System database - the databases of addresses in Russia. The archive is 5.5 GB. And it's a compressed XML file. After extraction, it will be a full 53 GB (set aside 110 GB for extraction). And when you start to parse and convert it, that 110 GB won't be enough. There won't be enough RAM either.

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First time post, also a new Cache developer, hence the <Beginner> tag.

If our data has Predefined terms in a dictionary, and a user can add terms on their own, can the terms exist in different tables?

Lets call the tables "Terms" and the user data in "UserTerms".

If a third class definition has a property of "Term" can it not be either Terms or UserTerms?

I'm leaning towards using a Subclass strategy where the pseudo "Parent" (forgive me) is  Dictionary.Term and the child is along the lines of Dictionary.Term.User

Last answer 26 March 2019 Last comment 28 March 2019
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Hello,

We have defined four BPL Business Processes. One gets occasionally errors when pool size is two. No errors happen with pool size one. The error happens on calling %Save() on a large objects with many references to other objects.

Error #5803: Failed to acquire exclusive lock on instance of 'classname'.

Error #5002: Cache error: <ROLLFAIL> %TRollBack+10^%occTransaction

The error happens on a particular large object.

Our FileService gets the same Errors #5803 and #5002 with class 'EnsLib.EDI.X12.Document'

Last answer 30 January 2019 Last comment 27 March 2019
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Is it possible to mimic what selenium does like navigating to a site and logging in  and filling out a form then logout in COS.I am trying to do that in COS using %Net.HttpRequest class or should I be using a different class the idea is to be able to call a web app login into it and fill out form and log out

Last answer 18 March 2019 Last comment 11 December 2018
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Our lab system is now sending DSC segments in large Pathology results in the ORU message that is followed by a partial continuation message with only MSH and OBX segments.  the  pointer is in the MSH;14 in the subsequent message.  I believe the goal is to concatenate the first and second message but imagine this will require some custom functions which I have not done much of.  Anyone already tackled this by chance? 

Initial message:

Last comment 6 March 2019
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I have an application which is distributed across maybe 5 servers since it has over a thousand users at a time we had an upgrade to the application last week and I had an integration build that uses the REST service (  ##class(%Net.HttpResponse) but since the upgrade the integration has not be able to communicate with the application tried testing my URL through Postman and all seems ok but if I test direct  I get a 500 error anything that I need to check on please or any advice on how to check what's going on.

Last answer 3 December 2018 Last comment 18 February 2019
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I've been wondering about some code that I have come across a lot over the years.

Let's assume I have class Cinema and class Film.
Conceptually the data in these classes are never really physically deleted but only flagged as such, due to business requirements.

What I find is that developers tend to create a 3rd class "CinemaFilms", in a child relationship to parent Cinema, with a reference to Film. Rather than a one-to-many between Cinema and Film. 

Last answer 7 June 2017 Last comment 13 February 2019
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Edit:

May have found the issue but not the solution.

"SELECT * FROM wmhISTORYdETAIL" runs as a passthrough without asking for the DNS.

but

'SELECT Count([wmhISTORYdETAIL].[HistHMNumber] AS CountOfHistHMNumber FROM [wmhISTORYdETAIL] WHERE ((([wmhISTORYdETAIL].[HistMovType])='Receipt') AND (([wmhISTORYdETAIL].[HistMovDate])>=Date()-1) AND (([wmhISTORYdETAIL].[HistMovDate])<Date()));'

asks for the DNS but both are linked to a table that has the password saved.

Any Ideas please?

Rob

Hi

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Hello all,

I have an XSL question and I wanted to see if someone within a community can help me out.  

To Summarize: I am working with XSL documents, single and multi-pages.  
Inside my style sheet XML document, which is supporting my pages, everything on the page, including a headers, footers and the items are calculated 
based on the portrait measurements. 
Pages come up on the screen as portrait, but sometimes, depending on dynamic data are wide, they do not print properly in portrait.

Last comment 2 February 2019
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Hello Cache Developers:  I was curious if anyone has ever created a TWAIN interface to their Cache Application?   I am new to TWAIN and hence the reason for this question.  From what I understand, TWAIN is software used by various digital imaging software and TWAIN provides an API for applications to call to be able to import images into their application.   I work with a healthcare application and was wondering what types of things are required for a Cache Web Application to call the TWAIN API to be able to load images into a Cache table.    Any input, sample code, or suggestions is apprec

Last answer 27 January 2019 Last comment 29 January 2019
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Let Say I have 
Class Carrier Extends %Persistent

Property Employee As Array of Class Employees

Class Employees Extends %SerialObject

Property Name As %String

Property Address As Array of Class AddressDetail

Class AddressDetail Extends %SerialObject

Property Street1 As %String

Property Street2 As %String


I can get value for Employee Name  as Employee_Name.

But I want to Get Value of Address Street1 and Street2 of Class AddressDetail using SQL Query
How can I get that?

Last answer 18 January 2019 Last comment 25 January 2019
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Hi All,

Actually I am trying to implement a RESt API where in I will get ZIPCODE as request and I need to call external API which will take ZIPCODE as input and give State and City in response.

But the problem is the request is in XML Format and also response is in XML format.

Example :

Last answer 24 January 2019 Last comment 24 January 2019
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