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Accessing Underlying Exception |
The chmexception is actually a container for the underlying exception object. This is because Python requires that exceptions be of Python Exception type.
To actually call methods on the error, you must first retrieve the underlying object using its errorobject attribute in the 4.5 parser engine:
if not validation_field or not validation_field.value=="ABCD":
#The field doesn't exist or its value is not equal to ABCD
Error = chmexception.errorobject #get the underlying object
Error.set_parameter("MyErrorCode","1") #set some parameters
Error.description = "Field is not ABCD" #set the description
raise chmexception #raise the exception
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The resulting exception looks like this:
Error Code: 0x80002006 Description: Field is not ABCD FieldName: Qualifier1 MessageSegmentName: N3 SegmentRepeatIndex: 0 GrammarSegmentName: N3 ValidationRuleClassId: 3 FieldIndex: 1 ValidationRuleClassName: Python Validation Rule ValidationRuleName: Example Python Validation Rule MessageSegmentIndex: 2 MyErrorCode: 1 |
In the new parser (5.0 and up), you can raise exceptions more easily. For example:
#Using the new parser, you can use the ChameleonException directly:
err = ChameleonException('my error')
err.set_parameter('somekey','somevalue')
raise err
#or, making it even more simple:
raise ChameleonException('my error')
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Whatever method you decide to use, rememeber that the specialized Chameleon object is only available within Python validation rules.