rules
rules copied to clipboard
jruizgit
Question: Understanding Events
Based on my understanding two events satisfying the condition are retracted once triggered. Can the second event be used (as first) to validate the third and so on?
Hi, thanks for asking the question. Do you have an example of what you have in mind?
Using the rules from the documentation here,
with ruleset('risk'): @when_all(c.first << m.t == 'purchase', c.second << m.location != c.first.location) # the event pair will only be observed once def fraud(c): print('Fraud detected -> {0}, {1}'.format(c.first.location, c.second.location))
post('risk', {'t': 'purchase', 'location': 'US'})
post('risk', {'t': 'purchase', 'location': 'CA'})
post('risk', {'t': 'purchase', 'location': 'UK'})
Upon execution, the rule is triggered once when an anomaly is detected from US -> CA but then my expectation/usecase is that the same anomaly be detected when the 3rd event is posted CA - UK without me adding a new condition like c.third.
Also I see a discrepancies in reference to the documentation https://github.com/jruizgit/rules/blob/master/docs/py/reference.md#events, the actual output I get when I run the defined example is
Fraud detected -> CA, US
and not
Fraud detected -> US, CA Fraud detected -> CA, US
Further am not sure if this statement is correct "In the example both facts satisfy the first condition m.t == 'purchase' and each fact satisfies the second condition m.location != c.first.location in relation to the facts which satisfied the first."
Based on my observation its not necessary for the second event to satisfy the first condition, even if second event is post('risk', {'t': 'declined', 'location': 'CA'}) which doesn't satisfy the first condition, the event will be triggered just because the second condition matches the second event.
Am using python3 and durable-rules==2.0.19 for my testing
Hi, thanks for asking the question. Do you have an example of what you have in mind?
it is a bug?dear sir ,are you still on earth?
