protected function db_update_validation()
{
$validation_result = (object) array('success' => false);
$field_types = $this->get_field_types();
$required_fields = $this->required_fields;
$unique_fields = $this->_unique_fields;
$edit_fields = $this->get_edit_fields();
if (!empty($required_fields)) {
foreach ($edit_fields as $edit_field) {
$field_name = $edit_field->field_name;
if (!isset($this->validation_rules[$field_name]) && in_array($field_name, $required_fields)) {
$this->set_rules($field_name, $field_types[$field_name]->display_as, 'required');
}
}
}
/** Checking for unique fields. If the field value is not unique then
* return a validation error straight away, if not continue... */
if (!empty($unique_fields)) {
$form_validation = $this->form_validation();
$form_validation_check = false;
foreach ($edit_fields as $edit_field) {
$field_name = $edit_field->field_name;
if (in_array($field_name, $unique_fields)) {
$state_info = $this->getStateInfo();
$primary_key = $this->get_primary_key();
$field_name_value = $_POST[$field_name];
$this->basic_model->where($primary_key, $state_info->primary_key);
$row = $this->basic_model->get_row();
if (!isset($row->{$field_name})) {
throw new Exception("The field name doesn't exist in the database. " . "Please use the unique fields only for fields " . "that exist in the database");
}
$previous_field_name_value = $row->{$field_name};
if (!empty($previous_field_name_value) && $previous_field_name_value != $field_name_value) {
$form_validation->set_rules($field_name, $field_types[$field_name]->display_as, 'is_unique[' . $this->basic_db_table . '.' . $field_name . ']');
$form_validation_check = true;
}
}
}
if ($form_validation_check && !$form_validation->run()) {
$validation_result->error_message = $form_validation->error_string();
$validation_result->error_fields = $form_validation->_error_array;
return $validation_result;
}
}
if (!empty($this->validation_rules)) {
$form_validation = $this->form_validation();
$edit_fields = $this->get_edit_fields();
foreach ($edit_fields as $edit_field) {
$field_name = $edit_field->field_name;
if (isset($this->validation_rules[$field_name])) {
$rule = $this->validation_rules[$field_name];
$form_validation->set_rules($rule['field'], $rule['label'], $rule['rules']);
}
}
if ($form_validation->run()) {
$validation_result->success = true;
} else {
$validation_result->error_message = $form_validation->error_string();
$validation_result->error_fields = $form_validation->_error_array;
}
} else {
$validation_result->success = true;
}
return $validation_result;
}