[Cakephp3] Stop the execution of a query !

Hi,

Sorry for may bad english :(

I want to stop and break the execution of query if there is an error, let's say that i have two chained "find"(find('default')->find('first'))

I passed a param to the find('default')(exp.: min=5) and this param hasn't the format that i want(min=a_string), the problem that the executed query just ignore the param !

How i can stop the execution ? I tried to do return false inside the find instead of return $query but this doesn't has any effect !

Thanks 

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