Caché

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I am still new to cache objectscript and am trying to figure out how I would go about removing the escape characters from my JSON below. When I call the $toJSON method it's adding the "\" character in the file path.

 

{"FileStatus":"P","Path":"\/somepath\/test\/test123\/filename.txt","InterchangeOID":"100458"}

My Code

Last answer 2 days ago Last comment 5 min 31 sec ago
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Intro

Most server-client communication on the web is based on a request and response structure. The client sends a request to the server and the server responds to this request. The WebSocket protocol provides a two-way channel of communication between a server and client, allowing servers to send messages to clients without first receiving a request. For more information on the WebSocket protocol and its implementation in InterSystems IRIS, see the links below.

This tutorial is an update of "Asynchronous Websockets -- a quick tutorial" for Caché 2016.2+ and InterSystems IRIS 2018.1+

Last comment 2 hours 25 min ago
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I have a process that takes data from a CSV file (actually a record mapper object) and creates a nicely formatted JSON string I would love to send this along to a RESTful business operation.  However no matter what I try, I continually get <INVALID OREF> errors when trying to populate the object that extends Ens.Request to give it the JSON string.

I can add strings, other objects, you name it - but stuffing a JSON formatted variable/object into another object I want to send someplace is proving to be an impossibility.

Does anyone have an example of sending an Ens.Request or other object (not an HTTPRequest object - but some other custom object) containing a JSON string to an Operation where the operation ultimately pulls the JSON from the object that was sent to it, makes the REST POST call and sends the response back

Last answer 3 days ago Last comment 10 hours 29 min ago
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I'm using callin to get global values.

Here's a simple function to get string value from global and return it:

int GetGlobalStr(char *global, CACHE_EXSTRP result)
{
    int push = CACHEPUSHGLOBAL(strlen(global), global);

    // narg Number of subscript expressions pushed onto the argument stack.
    int narg = 0;

    // flag - Indicates behavior when global reference is undefined:
    // 0 — returns CACHE_ERUNDEF
    // 1 — returns CACHE_SUCCESS but the return value is an empty string.
    int flag = 1;

    int get = CACHEGLOBALGET(narg, flag);

    int pop = CACHEPOPEXSTR(result);

    return ZF_SUCCESS;
}

I get global value in result successfully. However I need to iterate over $lb. How can I do that?

Last answer 7 days ago Last comment 12 hours 46 min ago
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So, one day you're working away at WidgetsDirect, the leading supplier of widget and widget accessories, when your boss asks you to develop the new customer facing portal to allow the client base to access the next generation of Widgets..... and he wants you to use Angular 1.x to read into the department's Caché server.   

There's only one problem:  You've never used Angular, and don't know how to make it talk to Caché.

This guide is going to walk through the process of setting up a full Angular stack which communicates with a Caché backend using JSON over REST.  

Part 1 - Setup

To start fresh, we will create a Namespace for our new application - WIDGETDIRECT, and set this up with Code and Data databases, and appropriate Security roles.  

Our next step is to set up 2 Applications to serve web content; one for the Angular web content and one to serve the REST conten

Last comment 14 hours 31 min ago
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The %Net.SSH.Session class lets you connect to servers using SSH. It's most commonly used with SFTP, especially in the FTP inbound and outbound adaptors.

In this article, I'm going to give a quick example of how to connect to an SSH server using the class, describe your options for authenticating, and how to debug when things go wrong.

Here's an example of making the connection:

Set SSH = ##class(%Net.SSH.Session).%New()
Set return=SSH.Connect("ftp.intersystems.com")​

This creates a new connection, and then connects to the ftp.intersystems.com SFTP server on the default port. At this point, the client and server have picked encryption algorithms and options, but no user has logged in yet.

Once you're connected, you can choose how to authenticate. There are three methods to choose from

Last comment 21 hours 13 min ago
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Dear team,

I am trying to experiment the Docker container in our development environment. I have successfully build an image and running the container. When I access the CSP portal home page ( http://<host-ip>:57772/csp/sys/%25CSP.Portal.Home.zen?$NAMESPACE=%25SYS), I am getting the following error:

Caché Server Pages Version 2017.1.1.111.0.17521
 
Server Availability Error
Server is currently unavailable

 

I logged in to the running container (docker exec -it <container-id> sh), issued the command, 'ccontrol list' where the state says 'warn'

Last answer 3 days ago Last comment 1 days ago
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Class ICT.Experiments.A Extends %Persistent
{
Property Name As %String;
Property Collection As list Of ICT.Experiments.B;
Property Collection2 As array Of ICT.Experiments.C;
}

Class ICT.Experiments.B Extends %Persistent
{
Property Name As %String;
}

Class ICT.Experiments.C Extends %Persistent
{
Property Name As %String;
}

I have the classes above and I can select columns from the array collection by using two joins as follows:

SELECT 
mainTable.ID, mainTable.Name, c.Name
FROM ICT_Experiments.A mainTable
LEFT JOIN ICT_Experiments.A_Collection2 arrayTable ON arrayTable.A = mainTable.%ID
LEFT JOIN ICT_Experiments.C c ON c.%ID = arrayTable.Collection

Last answer 6 days ago Last comment 2 days ago
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Hi Team,

I am using Angular 7 with angular material for my client application that connects and obtains Access token from IRIS Authorization Server (OAUTH 2.0).  The problem that I am facing right now is regarding this access token being exposed to browser and stores in the local storage of the browser.

Last answer 2 days ago
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Hello all,

I am still learning CACHE and have below question.

In one of my ZEN method i am creating a table using

&sql(CREATE TABLE xxxxx(TNAMESPACE CHAR(100),TINTERFACE CHAR(100)))

Does any one knows how to concatenate a $USERNAME or any  content of a variable to the name of table

Last answer 2 days ago Last comment 2 days ago
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Hello,

I am trying to run a simple SELECT STATEMENT in USER NAMESPACE.

SELECT * FROM projectname.table

What is the syntax if i need to get data for a table in another namespace eg. SAMPLES., SYS

SELECT * FROM SAMPLES.projectname.table  is not working.

Thanks in advance.

Jimmy Christian.

Last answer 3 days ago Last comment 3 days ago
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What is the process in importing a role from one server to another server?

Let's say Server A is our main server that we maintain all of our resources / roles / users. We would like to get these over to Server B, Server C, Server D, etc.

It looks like when we import, there are tables and resources left in the destination servers that are not in the source server. It looks like whatever was in the destination server that was not part of the source server was not deleted from the import.

What is the proper way of exporting/importing a role so that this does not happen?

Last answer 7 days ago Last comment 7 days ago
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Estimated reading time: 6 minutes
 

Hello everyone,

I was first introduced to TDD almost 9 year ago, and I immediately fell in love with it. 
Nowadays it's become very popular but, unfortunately, I see that many companies don't use it. Moreover, many developers don't even know what it is exactly or how to use it, mainly beginners.

 

 

Overview

My goal with this article is to show how to use TDD with %UnitTest. I will show my workflow and explain how to use cosFaker, one of my first projects, which I created using Caché and recently uploaded to OpenExchange.

So buckle up and let's go.

Last comment 7 days ago
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I have problem with Cache installed on a colleague's Windows 10 laptop.  On the laptop, Cache was automatically configured to use IIS and this has worked fine with csp applications configured in the Management Portal.

Now this seems to have stopped working, and I can't work out why.  In IIS, the web application seems to be in the correct place.

I have manually mapped the various file extensions to CSPms, as per the documentation, but any attempt to navigate to a csp page produces an 500 error, which tells me precisely nothing about why this is happening.

For example,

http://localhost/csp/myapp/login.csp -> 500 error

 

 

 

I have re-installed Cache, with the repair option in the hope that this would reset any mappings or config settings to do with IIS, but it, too, has achieved nothing.

I am not a webserver guru, and this is the first time I have mucked around with IIS in literally years

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Hi guys!

Portrait of  Madame X, Gustave Caillebotte.

One of the features I like in InterSystems ObjectScript is how you can process array transformations in a specific method or a function.

Usually when we say "process an array" we assume a very straightforward algorithm which loops through an array and does something with its entries upon a certain rule.

The trick is how you transfer an array to work with into a function. 

One of the nice approaches on how to pass the information about an array is using $Name and Indirection operator. 

Below you can find a very simple example which illustrates the thing.

Last comment 7 days ago
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I have an xml that has non standard characters and I would like to transform it with xslt  so that those characters render in the format  &#nnn here is what I have so far any help appreciated 

xslt

 

 

<!--?xml version="1.0"?-->
<xsl:transform version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output encoding="Windows-1252" indent="yes" omit-xml-declaration="yes" method="xml">
>  <xsl:template match="/Recordset">
    <recordset><xsl:apply-templates></xsl:apply-templates></recordset>
  </xsl:template>
  <xsl:template match="*|@*">
    <xsl:copy>
      <xsl:apply-templates select="@*">
      <xsl:apply-templates>
    </xsl:apply-templates></xsl:apply-templates></xsl:copy>
  </xsl:template>
</xsl:output></xsl:transform>
 

XML

Last comment 8 days ago
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Referencing this post:

https://community.intersystems.com/post/producing-json-sql

I'm not sure how to actually interact with the result set I get from doing something like this.  I want to return something like:

[{"field1":1, "field2":2}, {"field1":2, "field2":10}]

I'm finding it very difficult to get it in this format, since %Print appends a newline onto the end of the {} object it prints.

Here's the closest I've gotten:

set query = "select JSON_OBJECT('field1': field1, 'field2":field2) from MyTable where x=? and y=?"

    set tStatement = ##class(%SQL.Statement).%New()
    set qStatus = tStatement.%Prepare(query)
    if qStatus'=1 {WRITE "%Prepare failed:" DO $System.Status.DisplayError(qStatus) QUIT

Last answer 13 days ago Last comment 9 days ago
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Continuing on from my last post, I am posting my succesful output for the Day 2 Part 1 below.

A full explanation of Day 2 part 1 can be found at: https://adventofcode.com/2018/day/2 and the input can be found

at: https://adventofcode.com/2018/day/2/input

A brief description of this exercise is that you receive a sequence of strings.

You have to count the if any duplicate or triplicate chars exist in the string.  Multiples will exist, but if you find multiple ldupicates / triplicates you will count them once.

At the end of sequence of strings you have to SUM the no. of duplicate / triplicate chars and multiply them together to get a simple check sum value.

I created 2 methods, one to import the data and the second to analyse the strings and populate the duplicate count and triple count properties

Last comment 10 days ago
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I needed to know programmatically if last ran failed or not.

After some exploring, here's the code:

ClassMethod isLastTestOk() As %Boolean
{
  set in = ##class(%UnitTest.Result.TestInstance).%OpenId(^UnitTest.Result)
  for i=1:1:in.TestSuites.Count() {
    #dim suite As %UnitTest.Result.TestSuite
    set suite = in.TestSuites.GetAt(i)
    return:suite.Status=0 $$$NO
  }
  quit $$$YES
}

Last comment 12 days ago
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