Adding row to dataset error

Ignition
1

I have a Dataset type custom property on my root container. I would like to add a row to that dataset using the following code:

I get this error:

Traceback (most recent call last):
File "event:actionPerformed", line 3, in
TypeError: addRow(): 1st arg can't be coerced to com.inductiveautomation.ignition.common.Dataset

at org.python.core.PyException.fillInStackTrace(PyException.java:70)
at java.lang.Throwable.<init>(Throwable.java:181)
at java.lang.Exception.<init>(Unknown Source)
at java.lang.RuntimeException.<init>(Unknown Source)
at org.python.core.PyException.<init>(PyException.java:46)
at org.python.core.PyException.<init>(PyException.java:43)
at org.python.core.PyException.<init>(PyException.java:61)
at org.python.core.Py.TypeError(Py.java:235)
at org.python.core.PyReflectedFunction.throwError(PyReflectedFunction.java:209)
at org.python.core.PyReflectedFunction.throwBadArgError(PyReflectedFunction.java:312)
at org.python.core.PyReflectedFunction.throwError(PyReflectedFunction.java:321)
at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:167)
at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:204)
at org.python.core.PyObject.__call__(PyObject.java:404)
at org.python.core.PyObject.__call__(PyObject.java:408)
at org.python.pycode._pyx39.f$0(<event:actionPerformed>:3)
at org.python.pycode._pyx39.call_function(<event:actionPerformed>)
at org.python.core.PyTableCode.call(PyTableCode.java:165)
at org.python.core.PyCode.call(PyCode.java:18)
at org.python.core.Py.runCode(Py.java:1275)
at com.inductiveautomation.ignition.common.script.ScriptManager.runCode(ScriptManager.java:548)
at com.inductiveautomation.factorypmi.application.binding.action.ActionAdapter.runActions(ActionAdapter.java:155)
at com.inductiveautomation.factorypmi.application.binding.action.ActionAdapter.invoke(ActionAdapter.java:266)
at com.inductiveautomation.factorypmi.application.binding.action.RelayInvocationHandler.invoke(RelayInvocationHandler.java:55)
at $Proxy17.actionPerformed(Unknown Source)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$400(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Ignition v7.5.10-rc1 (b1455)
Java: Sun Microsystems Inc. 1.6.0_38

If I tell the script to write to a dataset of a dropdown components dataset like the example in the manual shows, it works correctly. I guess I need to know what the difference is between the custom property dataset and the dropdowns dataset.

2

Hard to tell from here, but is ‘test’ a dataset in the root container? If so, you could try this:

dropdown = event.source.parent
newRow = [5, "New Option"]
dropdown.test = system.dataset.addRow(dropdown.test, newRow)

Just a thought.

3

yes test is the custom property on the root container. What you proposed threw a no attribute data error.

weird thing is that I can bind the custom property dataset to the dropdown dataset or to a table dataset and add the new row to the table or dropdowns dataset and it carries over to the custom property dataset with no issue.

4

One of my coworkers figured it out

1 Like
5

Thank you so much for posting this. The example in the manual is wrong or worded incorrectly as I have been copying and pasting it and also could not get it to work.

This example in the manual needs to be fixed.

6

Hello,

It’s been a while since this post but I wanted to point out that the example in the user manual has long since been updated.

For anyone coming into this thread with a similar problem, the real issue is likely in the last line. If you did something like:

component.property = dataset

Then everything will work because you are setting the value to a property on a component. If you do something like:

compDataset = component.property
compDataset = dataset

Then this will not work because you are setting one dataset to be equal to another without saving back to the component. The component.property in the last line makes all the difference.