Question

I want to add check for more than one values in where clause. Db_RecordExists just check for one filed. I have read that you can extend zend validate abstract class and you can have your own validator. can I have one little example about this please.

Thank you…

Answer 1

What are you trying to do exactly? To me, you don’t even need a custom validator.

If you read carefully the source code of Zend_Validate_Db_Abstract you will notice this phpDoc above the constructor:

Provides basic configuration for use with Zend_Validate_Db Validators
Setting $exclude allows a single record to be excluded from matching.
Exclude can either be a String containing a where clause, or an array with field and value keys
to define the where clause added to the sql.
A database adapter may optionally be supplied to avoid using the registered default adapter.

The following option keys are supported:

1. ‘table’ => The database table to validate against
2. ‘schema’ => The schema keys
3. ‘field’ => The field to check for a match
4. ‘exclude’ => An optional where clause or field/value pair to exclude from the query
5. ‘adapter’ => An optional database adapter to use

Which means that if you want to check if a record exists using more than one value, you can do it simply in passing the where clause to the validator instead of a pair field/value:

$where = 'user_id != 110 AND email != "[e-mail]"';
$where = array('users', 'email', $where);

$element->addValidator('db_NoRecordExists', true, $where)

This will basically check if a record exists in the users table, and exclude rows where user id != 110 or [e-mail]. Naturally, I recommend you to use Zend_Db methods such as quoteIdentifier() in order to generate a fully escaped query expression.

You can add as many fields as you want of course.

You can find more information about Db_NoRecordExists in the documentation.