CRED is a WordPress plugin that lets you easily build front-end forms for creating and editing content and users.
CRED User Guides include detailed documentation on creating forms, including related fields that belong to the content or the users, validating the input and displaying the forms with custom HTML styling.
When you ask for help or report issues, make sure to tell us the versions of the Toolset plugins that you have installed and activated.
Viewing 15 topics - 736 through 750 (of 980 total)
The issue here is that the user wanted to ensure that only unique values can be entered into their custom field on their frontend form.
This means that 2 users can't have the same values in the custom fields.
Solution:
You can use the Toolset forms Validation hook to do this.
Add the following hook to your Toolset custom code section in Toolset->Custom Codes and enable it
/**
* CRED custom validation to prevent duplicates CREATE FORM
*/
add_filter( 'cred_form_validate', 'prevent_duplicate_submissions_registration' ,10,2);
function prevent_duplicate_submissions_registration( $error_fields, $form_data) {
$nickname = $_POST['wpcf-form-field']; // Gets value from form
$unique_field = 'wpcf-field-name'; // Meta key stored in db
$form_ids = array( 69696969 ); // Edit IDs of CRED forms
list( $fields,$errors ) = $error_fields;
if ( in_array($form_data['id'], $form_ids ) ) {
// Get existing posts with unique field
$args = array(
'meta_key' => $unique_field,
'meta_value' => $nickname,
'meta_compare' => '=' ,
);
$matching = new WP_User_Query( $args );
$results = $matching->get_results();
if ( !empty( $results ) ) {
$errors[ $unique_field ] = $nickname . ' is already in use. Choose a different name.';
}
}
return array($fields,$errors);
};
/**
* CRED custom validation to prevent duplicates EDIT FORM - excludes current user from the query as it will find a matching nickname
*/
add_filter( 'cred_form_validate', 'prevent_duplicate_submissions' ,10,2);
function prevent_duplicate_submissions( $error_fields, $form_data) {
$current_user = get_current_user_id();
$nickname = $_POST['wpcf-form-field']; // Gets value from form
$unique_field = 'wpcf-field-name'; // Meta key stored in db
$form_ids = array( 420420 ); // Edit IDs of CRED forms
list( $fields,$errors ) = $error_fields;
if ( in_array($form_data['id'], $form_ids ) ) {
// Get existing posts with unique field
$args = array(
'meta_key' => $unique_field,
'meta_value' => $nickname,
'meta_compare' => '=' ,
'exclude' => $current_user
);
$matching = new WP_User_Query( $args );
$results = $matching->get_results();
if ( !empty( $results ) ) {
$errors[ $unique_field ] = $nickname . ' is already in use. Choose a different name.';
}
}
return array($fields,$errors);
};
Note this is for a user form and will need to be customized to work for posts, however in the case of a user form you will need to change the wpcf-form-field and wpcf-field-name to the slug of the field that you want to prevent the duplicate on while keeping the wpcf- prefix on the field slug.
