Escape Charachters

[jtabet010]

Hello zeroSteiner, thank you for this excellent engine. I wander how it is possilbe to add escaple charachters for special charachters like @ or - for example this rule RULE= '@ffice365-AuditData_Operation == "New Account" ' is returning rule_engine.errors.RuleSyntaxError: ("syntax error (illegal character '@')", LexToken(error,'@AuditData_Operation == "New Account" ',1,9))

and this rule 'Office365-AuditDataOperation == "New Account" ' doesn't work unless we replace the - with such as 'Office365_AuditData_Operation == "New Account" '

Thank you for you work,

[zeroSteiner]

No sorry, I don't really want to deal with the complications of adding a control character to alter the syntax when you could just replace the characters. The - isn't a special character it all, it's the subtract operator so office365-AuditData_Operation == "New Account" would be subtract AuditData_Operation from office365 and check if it equals "New Account". This would be syntatically correct but I doubt it's what you mean since you want office365-AuditData_Operation to be the symbol.

If you have multiple variables starting with office365 I'd suggest you put them into a dictionary like and do something like:

rule_engine.Rule('office365.AuditData_Operation == "New Account"').matches({ 
    'office365' : { 
        'AuditData_Operation': 'New Account', 
        'Account': 'John Doe' 
    } 
})

Note the . to treat AuditData_Operation as an attribute of office365.

I'm moving towards eventually having full first-class support for hashes / dictionaries at which point this would be a moot point since you could put your variables that would have unsupported characters into one and do: event['@Office365-AuditData_Operation'] == "New Account". That's a ways away at this point though.

[zeroSteiner]

Alright, so the escape characters for symbols aren't going to happen. What you can do now instead is use the new MAPPING datatype, then reference your data using strings like record["@Office365-AuditData_Operation"] == 'New Account'. This was added in the v2.4 release that I just published.

You can experiment with this behavior using the new Debug REPL utility.

python -m rule_engine.debug_repl --edit-console
edit the 'context' and 'thing' objects as necessary
>>> thing=dict(book=dict(title='Batman', publisher='DC', issue=1))
>>> 
exiting the edit console...
rule > book['title'] == 'Superman'
result: 
False
rule >