Question

I have a problem with ZF2 RecordExists method. I will explain my problematic case/scenario.

Table: users
Columns: id, emailaddress, websitename

Sample Records:
        1, [e-mail], 1site.com
        2, [e-mail], 1site.com
        3, [e-mail], 2site.com
        4, [e-mail], 2site.com
        5, [e-mail], 1site.com
        6, [e-mail], 3site.com
        7, [e-mail], 4site.com

I am using the following snippet for already exist condition.

//Check that the email address exists in the database
$validator = new Zend\Validator\Db\RecordExists(
    array(
        'table' => 'users',
        'field' => 'emailaddress'
    )
);

if ($validator->isValid($emailaddress)) {
    // email address appears to be valid
} else {
    // email address is invalid; print the reasons
    foreach ($validator->getMessages() as $message) {
        echo "$message\n";
    }
}

As per the above snippets, [e-mail] cannot register again. Because, that emailaddress is exist in table.
But, i would like to do register with 2site.com. Because, [e-mail] is in 1site.com.
So, [e-mail] cannot register with 1site.com again. But, [e-mail] can register with 2site.com.
How is it possible? Let me know your suggestions.

Answer 1

There are two way to do this.

First using Excluding Record methods
Where you exclude the record of websitename field value.

Zend\Validator\Db\RecordExists and Zend\Validator\Db\NoRecordExists
also provide a means to test the database, excluding a part of the
table, either by providing a where clause as a string, or an array
with the keys “field” and “value”.

$email     = '[e-mail]';
$clause    = $db->quoteInto('email = ?', $email);
$validator = new Zend\Validator\Db\RecordExists(
    array(
        'table'   => 'users',
        'field'   => 'username',
        'exclude' => $clause
    )
);

if ($validator->isValid($username)) {
    // username appears to be valid
} else {
    // username is invalid; print the reason
    $messages = $validator->getMessages();
    foreach ($messages as $message) {
        echo "$message\n";
    }
}

Second by writing your own custom validtor.
You need to extend AbstractDB class and create your own class on directions of RecordExists Class. In your own cust class your can define your own query and pass it to isValid function.

I have created a Custom Validator oposite to Exclude, which is include.
include is reserve word, Now sure if it will work.
check it here

More readings on this

Guidlines 1

Please have look to existing validtor for creating your own custom validatorCustom validator guildline

Chain validator 2