View source for Documentation:How to use the ExecutePS function in selfVM

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==== NOTE: ExecutePS is replaced with [[Documentation:OCLOperators PSEval|<Class>.PSEval]] - available in the context of every Class ====
This is a practical reference example of how to use the ExecutePS 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: =====
[[File:Execute -1.png|none|frame|283x283px]]

===== The ViewModel: =====
[[File:Execute -2.png|none|frame|419x419px]]

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:''' [[Documentation:OCLOperators ExecutePS|OCLOperators_ExecutePS]]



{{Edited|July|12|2025}}


[[Category:Intermediate-Friendly]]
[[Category:OCL (Object Constraint Language)]]
[[Category:OCL in ViewModels and UI Expressions]]
[[Category:Priority 60]]