[SOLVED] What is the syntax for sending a message from a popup in Perspective to refresh a binding on the root of a view?

Ignition
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1

I have a view called main. I want to refresh a binding on main from a script running in a popup window called my_popup.

The code on a button in my_popup is:

messageType = 'tbl_Refresh_Data'
system.perspective.sendMessage(messageType, scope='page')

Back on my view called main on the root I have a message handler called tbl_Refresh_Data listening in the page scope. The code on the message handler script is:

self.refreshBinding("self.custom.cells")

When I press the button on my_popup I get the gateway error message in the logs:

	Error running listCells/main@C/root.onMessageReceived(self, payload): Traceback (most recent call last): File "<function:onMessageReceived>", line 3, in onMessageReceived at com.inductiveautomation.perspective.common.api.PropertyKey.fromString(PropertyKey.java:48) at com.inductiveautomation.perspective.gateway.script.ComponentModelScriptWrapper$SafetyWrapper.refreshBinding(ComponentModelScriptWrapper.java:93) at jdk.internal.reflect.GeneratedMethodAccessor202.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: Invalid property key - no scope defined: self.custom.cells

which seems to be telling me that "self.custom.cells" doesn't exist however I picked "self.custom.cells" from the built in binding selector.

Does anyone know what I am doing wrong? I am new to Perspective message handlers so I could be making a mistake somewhere.

2

The manual shows that the syntax is
system.perspective.sendMessage(messageType, payload, [scope], [sessionId], [pageId])
Note that payload isn't optional so you need to add an empty dictionary, payload = {}. See if

messageType = 'tbl_Refresh_Data'
system.perspective.sendMessage(messageType, payload = {}, scope='page')

does the job.

The error message, Invalid property key - no scope defined: self.custom.cells is a little confusing but I suspect that it has taken your scope parameter as the payload parameter and then found the third parameter was missing.

https://docs.inductiveautomation.com/display/DOC81/system.perspective.sendMessage

2 Likes
3

Try deleting the self before self.custom.cells as you have already defined self before refreshbinding.


self.refreshBinding("custom.cells")
5 Likes
4

I thought so but it appears that payload is also optional.

5

This was the solution... a very strange issue and annoying.