#Caché

The purpose of this post is to raise the profile of a powerful mechanism that has long been available to us, and to open a discussion about ways in which it can be used or abused.

You can read more detail about the mechanism here. To summarize, your class definition can use the Projection keyword to reference one or more projection classes. A projection class can implement methods that get invoked at key points in the lifecycle of your class.

I need to pass a parameter string that contains slashes to a REST call.

I tried URL encoding, or making URL map to accept query parameter instead of path parameter but apparently we only allow for path parameters.

I can come with several workarounds, but these involve some transformation at client and then on server, but I'd prefer a direct support.

Q1: is there any Cache specific trick to pass slashes in path parameters

Q2: are we going to support query parameters in REST?

something like this would help:

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?

I would like to examine the contents of my OBX-5 field and not route the message if it contains alphabetic characters. I've tried various combinations of the Match and Contains functions, with no luck. Should I be using the COS ? operator or plaini regular expressions?

e.g.

OBX-5 Contains "\D"

OBX-5 Contains "?.A"

OBX-5 Contains "[A-Z]"

Hi Community!

Suppose you have a working system on 8-bit Caché database and need to transfer the solution to Unicode database.

How do you manage that?

Class Queries in InterSystems IRIS (and Cache, Ensemble, HealthShare) is a useful tool that separates SQL queries from Object Script code. Basically, it works like this: suppose that you want to use the same SQL query with different arguments in several different places.In this case you can avoid code duplication by declaring the query body as a class query and then calling this query by name. This approach is also convenient for custom queries, in which the task of obtaining the next row is defined by a developer. Sounds interesting? Then read on!

just wondered if there was a way to pass functions for execution to another function so that events can occur before and after?

like :

d ..MethodA(
   ..Method1("var"),
   ..Method2(0),
   ...
)

edit:

I managed to get it working with execute but is there a cleaner (easier way)?

Hi!

I believe the simplest is (to work with csv delimited by ";"):

set file = ##class(%File).%New( "data.csv" )
    set sc = file.Open( "R" ) 
    if $$$ISERR(sc) quit    ; or do smth

    while 'file.AtEnd {
        set str=file.ReadLine() 
        for i=1:1:$length( str, ";" ) {
            set id=$piece( str, ";" ,i ) 
            write !, id  // or do smth
        }
    }
    do file.Close()

Possible options:

different variants of error handling with sc code.

Embrace while loop into try/catch block.

And what's yours?

Hi!

I need to export some data from a table on CACHE and then import this data to a POSTGRESQL table.

Is this possible? I know I can export this data as a CSV format, but I prefer if there is a way to export that data as SQL format.

Thanks!!!

Hi Community!

How can I know the port of management portal e.g. from terminal?

The one which looks like

localhost:port/csp/sys/exp/%25CSP.Portal.Home.zen 

in browser?

We are going to start using Git within Cache.

One question came up - if the branch that you checked out does not have the class or mac file, what is the correct thing to do?

Should we delete from Cache or should we just keep it?

I'm leaning more towards deleting it because Cache should reflect what is in your work folder in git. But other team members are saying to keep it.

Hi all,

I wonder how to sync my server code to my local code using Visual Studio Code.

Previously, using Atelier, you could open a view of server and can copy the code to the current project, also if I change a BP, I could sync the code because I had a signal that It's warning me that there was a change and it needs to be updated.

I thing i shouls opening the ObjectScript: Explorer and select the code directaly, and right click -> Import and compile current file (Ctrl + F7)

If I use this command, the ouptut window shows:

Hello community,

I am trying to parse the below HttpResponse in Cache. Cannot get the Iterator to work. Is there a single loop which can parse both or single messages and grab the error?

{
error:[
{ txt1:'error msg1'},

{ txt2:'error msg2'},
]
}

{
error: {
txt1:[
'error msg1',

'error msg2'
]
}

Thanks,

Jimmy Christian

Hi all,

I'm wonder what could be the best way convert the sentence "Switch" C# into Cache code.

int caseSwitch = 1;

switch (caseSwitch)
{
    case 1:
    Console.WriteLine("Case 1");
    break;

    case 2:
    Console.WriteLine("Case 2");
    break;

    default:
    Console.WriteLine("Default case");
    break;

}

My first attempt was: