CakePHP – Call to a member function format() on array!

Written by James McDonald

June 7, 2016

// failing validator rule

    ->add('date', 'unique', [
    'rule' => 'validateUnique',
    'provider' => 'table',
    'message' => "One of the dates you submitted already exists!"

// working buildRules 
public function buildRules(...){

//... other rules here ...


Error: Call to a member function format() on array
File /Users/user/Sites/clam/vendor/cakephp/cakephp/src/Database/Type/DateTimeType.php
Line: 108


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