Documentation:How to use the ExecutePS function in selfVM: Difference between revisions

How to use the ExecutePS function in selfVM

Revision as of 05:03, 30 October 2024

This page was created by Wikiadmin on 2018-10-30. Last edited by Charles@mdriven.net on 2025-03-12.

NOTE: ExcutePS is replaced with selfVM.PSEval - use that instead for new stuff

This is a practical reference example of how to use the ExceutePS function from a ViewModel. There are many possible uses, but this one is fairly descriptive.

Need: Look up all the objects with the same value as one particular object. Maybe the user wants to know if something is unique or not…

The Model:

The ViewModel:

Set the vValueToMatch to the Attribute1 of the ViewModel root Thing. Then, call the ExecutePS, stating that it will get a result collection with the objects of type Thing if it runs the expression found in OutOfLoopToAvoidStdFetch.col1. Collect this result and add the objects to a list you added as a variable – vMyList.

The list can act as a root for Grid in the UI.

If you have a million Thing objects in the database, this ViewModel will only load the ones with the same attribute1 as the Thing object you started with.

See: OCLOperators_ExecutePS

@@ Line 5: / Line 5: @@
 '''Need:''' Look up all the objects with the same value as one particular object. Maybe the user wants to know if something is unique or not…
-The Model:
+===== The Model: =====
 [[File:Execute -1.png|none|frame|283x283px]]
-The ViewModel:
+===== The ViewModel: =====
 [[File:Execute -2.png|none|frame|419x419px]]
@@ Line 17: / Line 17: @@
 If you have a million Thing objects in the database, this ViewModel will only load the ones with the same attribute1 as the Thing object you started with.
-See: [[OCLOperators_ExecutePS]]
+'''See:''' [[OCLOperators_ExecutePS]]
 [[Category:OCLPS]]
 [[Category:View Model]]
 [[Category:OCL ViewModel Operators]]
 {{Edited|July|12|2024}}