NOTE: ExecutePS is replaced with <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:
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.