CakePHP3: validate decimal input - php

Question

This is probably a trivial question, but I can't figure it out.
I want my price value to have 2 decimal places. CakePHP should validate this, but it doesn't. CakePHP only checks if the input is a number and doesn't allow to pass decimal values.
I want it to check and pass values like 2.22 but also 2. Now it only allows the latter.
Part of validationDefault method:
$validator
->decimal('price')
->allowEmpty('price');
I checked CakePHP API and found decimal() method description:
decimal( float $check , integer|null $places null , string|null $regex null )
Checks that a value is a valid decimal. Both the sign and exponent are
optional.
But it does not take string as a parameter in this context(and CakePHP assign decimal() to my price column automatically during baking), so I guess this is why decimal('price', 2) don't work.
Any ideas?
REQUESTED EDIT:
Whole validationDefault method:
public function validationDefault(Validator $validator)
{
//$validator for other columns
$validator
->allowEmpty('price')
->add('price', 'money', array('rule' =>
array('money', 'left'),
'message' => 'Please supply a valid monetary amount.'));
return $validator;
}
My input field is created using HTML helper.

Answer 1

You should use money to validate price
$validator->notEmpty('price',array('message' => 'Please provide your amount'))
->add('price', 'money', array('rule' => array('money','left'),
'message' => 'Please supply a valid monetary amount.'));
Your can also try this
$validator->notEmpty('amount',array('message' => 'Please provide your amount'))
->add('amount','numeric',array('rule' => 'numeric' ,'message'=> 'Please provide a valid amount'));