Yes Ryan I understand, the clearest explanation I can ever find. Thanks! On Dec 18, 7:03 pm, Ryan Schmidt <google-2...@ryandesign.com> wrote: > 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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