On Dec 18, 2010, at 04:36, John Maxim wrote:
> On Dec 18, 6:29 pm, John Maxim wrote:
>>
>> It works with the same array key 'email' ? I tried, it works. May I
>> know why ?
>
> I think I understand now. Is it because the first name is the array
> name, and the following is the first array key ? therefore, subsequent
> is second key....and on... ?
I didn't understand your question -- didn't know which "email" you were
referring to since "email" occurs several times in your array. I agree it is a
bit confusing the way CakePHP uses a deeply-nested array to set up validation,
because you have to understand what each little bit is for. It took me awhile
to work through the documentation and examples on the topic. I can try to
explain it line by line in your example. Again I'll reformat it slightly and
set "last" to true in each:
var $validation = array(
'email' => array(
'notEmpty' => array(
'rule' => 'notEmpty',
'message' => 'This field cannot be blank',
'last' => true,
),
'email' => array(
'rule' => 'email',
'message' => 'That is not a valid email address.',
'last' => true,
),
),
);
Looking at each line:
> var $validation = array(
Defines the validation array. Each entry in this array is for one field that we
want to validate.
> 'email' => array(
Here we define the validation rules for the field named "email". Each entry in
this array is one validation rule.
> 'notEmpty' => array(
We're calling the first validation rule "notEmpty". This string has no
significance whatsoever to CakePHP; it's just a name to help you remember what
the rule is about, and needs to be unique for this field.
> 'rule' => 'notEmpty',
This validation rule uses the CakePHP built-in rule "notEmpty" which ensures
the field is not empty.
> 'message' => 'This field cannot be blank',
If the validation rule does not pass (i.e. if the field is empty), this message
will be shown.
> 'last' => true,
If validation does not pass, no further rules will be processed.
> ),
> 'email' => array(
This is the second validation rule for this field; we're calling this second
rule "email", but again, that name has no significance.
> 'rule' => 'email',
We're asking CakePHP to use its built-in rule "email" which verifies the field
contains a correctly-formatted email address.
> 'message' => 'That is not a valid email address.',
If validation fails, this message is shown.
> 'last' => true,
If validation fails, no further rules are processed. Somewhat irrelevant here
since this is the last rule for this field anyway, but I like to include it
always, since it makes it easier to add further rules later.
> ),
> ),
> );
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