/**
* Show dialogs and create a new tokens table
*/
function _newtokentable($iSurveyId)
{
$clang = $this->getController()->lang;
$aSurveyInfo = getSurveyInfo($iSurveyId);
if (!Permission::model()->hasSurveyPermission($iSurveyId, 'surveysettings', 'update') && !Permission::model()->hasSurveyPermission($iSurveyId, 'tokens', 'create')) {
Yii::app()->session['flashmessage'] = $clang->gT("Tokens have not been initialised for this survey.");
$this->getController()->redirect(array("/admin/survey/sa/view/surveyid/{$iSurveyId}"));
}
$bTokenExists = tableExists('{{tokens_' . $iSurveyId . '}}');
if ($bTokenExists) {
Yii::app()->session['flashmessage'] = $clang->gT("Tokens already exist for this survey.");
$this->getController()->redirect(array("/admin/survey/sa/view/surveyid/{$iSurveyId}"));
}
// The user have rigth to create token, then don't test right after
Yii::import('application.helpers.admin.token_helper', true);
if (Yii::app()->request->getQuery('createtable') == "Y") {
createTokenTable($iSurveyId);
LimeExpressionManager::SetDirtyFlag();
// LimeExpressionManager needs to know about the new token table
$this->_renderWrappedTemplate('token', array('message' => array('title' => $clang->gT("Token control"), 'message' => $clang->gT("A token table has been created for this survey.") . " (\"" . Yii::app()->db->tablePrefix . "tokens_{$iSurveyId}\")<br /><br />\n" . "<input type='submit' value='" . $clang->gT("Continue") . "' onclick=\"window.open('" . $this->getController()->createUrl("admin/tokens/sa/index/surveyid/{$iSurveyId}") . "', '_top')\" />\n")));
} elseif (returnGlobal('restoretable') == "Y" && Yii::app()->request->getPost('oldtable')) {
//Rebuild attributedescription value for the surveys table
$table = Yii::app()->db->schema->getTable(Yii::app()->request->getPost('oldtable'));
$fields = array_filter(array_keys($table->columns), 'filterForAttributes');
$fieldcontents = $aSurveyInfo['attributedescriptions'];
if (!is_array($fieldcontents)) {
$fieldcontents = array();
}
foreach ($fields as $fieldname) {
$name = $fieldname;
if ($fieldname[10] == 'c') {
//This belongs to a cpdb attribute
$cpdbattid = substr($fieldname, 15);
$data = ParticipantAttributeName::model()->getAttributeName($cpdbattid, Yii::app()->session['adminlang']);
$name = $data['attribute_name'];
}
if (!isset($fieldcontents[$fieldname])) {
$fieldcontents[$fieldname] = array('description' => $name, 'mandatory' => 'N', 'show_register' => 'N');
}
}
Survey::model()->updateByPk($iSurveyId, array('attributedescriptions' => serialize($fieldcontents)));
Yii::app()->db->createCommand()->renameTable(Yii::app()->request->getPost('oldtable'), Yii::app()->db->tablePrefix . "tokens_" . intval($iSurveyId));
Yii::app()->db->schema->getTable(Yii::app()->db->tablePrefix . "tokens_" . intval($iSurveyId), true);
// Refresh schema cache just in case the table existed in the past
//Check that the tokens table has the required fields
TokenDynamic::model($iSurveyId)->checkColumns();
//Add any survey_links from the renamed table
SurveyLink::model()->rebuildLinksFromTokenTable($iSurveyId);
$this->_renderWrappedTemplate('token', array('message' => array('title' => $clang->gT("Import old tokens"), 'message' => $clang->gT("A token table has been created for this survey and the old tokens were imported.") . " (\"" . Yii::app()->db->tablePrefix . "tokens_{$iSurveyId}" . "\")<br /><br />\n" . "<input type='submit' value='" . $clang->gT("Continue") . "' onclick=\"window.open('" . $this->getController()->createUrl("admin/tokens/sa/index/surveyid/{$iSurveyId}") . "', '_top')\" />\n")));
LimeExpressionManager::SetDirtyFlag();
// so that knows that token tables have changed
} else {
$this->getController()->loadHelper('database');
$result = Yii::app()->db->createCommand(dbSelectTablesLike("{{old_tokens_" . intval($iSurveyId) . "_%}}"))->queryAll();
$tcount = count($result);
if ($tcount > 0) {
foreach ($result as $rows) {
$oldlist[] = reset($rows);
}
$aData['oldlist'] = $oldlist;
}
$thissurvey = getSurveyInfo($iSurveyId);
$aData['thissurvey'] = $thissurvey;
$aData['surveyid'] = $iSurveyId;
$aData['tcount'] = $tcount;
$aData['databasetype'] = Yii::app()->db->getDriverName();
$this->_renderWrappedTemplate('token', 'tokenwarning', $aData);
}
}
/**
* This function deletes the participant from the participants table,
* references in the survey_links table (but not in matching tokens tables)
* and then all the participants attributes.
* @param $rows Participants ID separated by comma
* @return void
**/
function deleteParticipants($rows, $bFilter = true)
{
// Converting the comma separated IDs to an array and assign chunks of 100 entries to have a reasonable query size
$aParticipantsIDChunks = array_chunk(explode(",", $rows), 100);
foreach ($aParticipantsIDChunks as $aParticipantsIDs) {
if ($bFilter) {
$aParticipantsIDs = $this->filterParticipantIDs($aParticipantsIDs);
}
foreach ($aParticipantsIDs as $aID) {
$oParticipant = Participant::model()->findByPk($aID);
if ($oParticipant) {
$oParticipant->delete();
}
}
Yii::app()->db->createCommand()->delete(Participant::model()->tableName(), array('in', 'participant_id', $aParticipantsIDs));
// Delete survey links
Yii::app()->db->createCommand()->delete(SurveyLink::model()->tableName(), array('in', 'participant_id', $aParticipantsIDs));
// Delete participant attributes
Yii::app()->db->createCommand()->delete(ParticipantAttribute::model()->tableName(), array('in', 'participant_id', $aParticipantsIDs));
}
}
/**
* Function responsible to deactivate a survey.
*
* @access public
* @param int $iSurveyID
* @return void
*/
public function deactivate($iSurveyID = null)
{
$iSurveyID = Yii::app()->request->getPost('sid', $iSurveyID);
$iSurveyID = sanitize_int($iSurveyID);
$date = date('YmdHis');
//'His' adds 24hours+minutes to name to allow multiple deactiviations in a day
if (empty($_POST['ok'])) {
if (!tableExists('survey_' . $iSurveyID)) {
$_SESSION['flashmessage'] = gT("Error: Response table does not exist. Survey cannot be deactivated.");
$this->getController()->redirect($this->getController()->createUrl("admin/survey/sa/view/surveyid/{$iSurveyID}"));
}
$aData['surveyid'] = $iSurveyID;
$aData['date'] = $date;
$aData['dbprefix'] = Yii::app()->db->tablePrefix;
$aData['step1'] = true;
} else {
//See if there is a tokens table for this survey
if (tableExists("{{tokens_{$iSurveyID}}}")) {
$toldtable = Yii::app()->db->tablePrefix . "tokens_{$iSurveyID}";
$tnewtable = Yii::app()->db->tablePrefix . "old_tokens_{$iSurveyID}_{$date}";
if (Yii::app()->db->getDriverName() == 'pgsql') {
$tidDefault = Yii::app()->db->createCommand("SELECT pg_attrdef.adsrc FROM pg_attribute JOIN pg_class ON (pg_attribute.attrelid=pg_class.oid) JOIN pg_attrdef ON(pg_attribute.attrelid=pg_attrdef.adrelid AND pg_attribute.attnum=pg_attrdef.adnum) WHERE pg_class.relname='{$toldtable}' and pg_attribute.attname='tid'")->queryScalar();
if (preg_match("/nextval\\('(tokens_\\d+_tid_seq\\d*)'::regclass\\)/", $tidDefault, $matches)) {
$oldSeq = $matches[1];
$deactivateresult = Yii::app()->db->createCommand()->renameTable($oldSeq, $tnewtable . '_tid_seq');
$setsequence = "ALTER TABLE " . Yii::app()->db->quoteTableName($toldtable) . " ALTER COLUMN tid SET DEFAULT nextval('{$tnewtable}_tid_seq'::regclass);";
$deactivateresult = Yii::app()->db->createCommand($setsequence)->query();
}
}
$tdeactivateresult = Yii::app()->db->createCommand()->renameTable($toldtable, $tnewtable);
$aData['tnewtable'] = $tnewtable;
$aData['toldtable'] = $toldtable;
}
//Remove any survey_links to the CPDB
SurveyLink::model()->deleteLinksBySurvey($iSurveyID);
// IF there are any records in the saved_control table related to this survey, they have to be deleted
$result = SavedControl::model()->deleteSomeRecords(array('sid' => $iSurveyID));
//Yii::app()->db->createCommand($query)->query();
$sOldSurveyTableName = Yii::app()->db->tablePrefix . "survey_{$iSurveyID}";
$sNewSurveyTableName = Yii::app()->db->tablePrefix . "old_survey_{$iSurveyID}_{$date}";
$aData['sNewSurveyTableName'] = $sNewSurveyTableName;
//Update the autonumber_start in the survey properties
$new_autonumber_start = 0;
$query = "SELECT id FROM " . Yii::app()->db->quoteTableName($sOldSurveyTableName) . " ORDER BY id desc";
$sLastID = Yii::app()->db->createCommand($query)->limit(1)->queryScalar();
$new_autonumber_start = $sLastID + 1;
$insertdata = array('autonumber_start' => $new_autonumber_start);
$survey = Survey::model()->findByAttributes(array('sid' => $iSurveyID));
$survey->autonumber_start = $new_autonumber_start;
$survey->save();
if (Yii::app()->db->getDriverName() == 'pgsql') {
$idDefault = Yii::app()->db->createCommand("SELECT pg_attrdef.adsrc FROM pg_attribute JOIN pg_class ON (pg_attribute.attrelid=pg_class.oid) JOIN pg_attrdef ON(pg_attribute.attrelid=pg_attrdef.adrelid AND pg_attribute.attnum=pg_attrdef.adnum) WHERE pg_class.relname='{$sOldSurveyTableName}' and pg_attribute.attname='id'")->queryScalar();
if (preg_match("/nextval\\('(survey_\\d+_id_seq\\d*)'::regclass\\)/", $idDefault, $matches)) {
$oldSeq = $matches[1];
$deactivateresult = Yii::app()->db->createCommand()->renameTable($oldSeq, $sNewSurveyTableName . '_id_seq');
$setsequence = "ALTER TABLE " . Yii::app()->db->quoteTableName($sOldSurveyTableName) . " ALTER COLUMN id SET DEFAULT nextval('{{{$sNewSurveyTableName}}}_id_seq'::regclass);";
$deactivateresult = Yii::app()->db->createCommand($setsequence)->query();
}
}
$deactivateresult = Yii::app()->db->createCommand()->renameTable($sOldSurveyTableName, $sNewSurveyTableName);
$insertdata = array('active' => 'N');
$survey->active = 'N';
$survey->save();
$prow = Survey::model()->find('sid = :sid', array(':sid' => $iSurveyID));
if ($prow->savetimings == "Y") {
$sOldTimingsTableName = Yii::app()->db->tablePrefix . "survey_{$iSurveyID}_timings";
$sNewTimingsTableName = Yii::app()->db->tablePrefix . "old_survey_{$iSurveyID}_timings_{$date}";
$deactivateresult2 = Yii::app()->db->createCommand()->renameTable($sOldTimingsTableName, $sNewTimingsTableName);
$deactivateresult = $deactivateresult && $deactivateresult2;
$aData['sNewTimingsTableName'] = $sNewTimingsTableName;
}
$aData['surveyid'] = $iSurveyID;
Yii::app()->db->schema->refresh();
}
$this->_renderWrappedTemplate('survey', 'deactivateSurvey_view', $aData);
}
/**
* Marks a tokens as completed and sends a confirmation email to the participiant.
* If $quotaexit is set to true then the user exited the survey due to a quota
* restriction and the according token is only marked as 'Q'
*
* @param mixed $quotaexit
*/
function submittokens($quotaexit = false)
{
$surveyid = Yii::app()->getConfig('surveyID');
if (isset($_SESSION['survey_' . $surveyid]['s_lang'])) {
$thissurvey = getSurveyInfo($surveyid, $_SESSION['survey_' . $surveyid]['s_lang']);
} else {
$thissurvey = getSurveyInfo($surveyid);
}
$clienttoken = $_SESSION['survey_' . $surveyid]['token'];
$sitename = Yii::app()->getConfig("sitename");
$emailcharset = Yii::app()->getConfig("emailcharset");
// Shift the date due to global timeadjust setting
$today = dateShift(date("Y-m-d H:i:s"), "Y-m-d H:i", Yii::app()->getConfig("timeadjust"));
// check how many uses the token has left
$token = Token::model($surveyid)->findByAttributes(array('token' => $clienttoken));
if ($quotaexit == true) {
$token->completed = 'Q';
$token->usesleft--;
} else {
if ($token->usesleft <= 1) {
// Finish the token
if (isTokenCompletedDatestamped($thissurvey)) {
$token->completed = $today;
} else {
$token->completed = 'Y';
}
if (isset($token->participant_id)) {
$slquery = SurveyLink::model()->find('participant_id = :pid AND survey_id = :sid AND token_id = :tid', array(':pid' => $token->participant_id, ':sid' => $surveyid, ':tid' => $token->tid));
if ($slquery) {
if (isTokenCompletedDatestamped($thissurvey)) {
$slquery->date_completed = $today;
} else {
// Update the survey_links table if necessary, to protect anonymity, use the date_created field date
$slquery->date_completed = $slquery->date_created;
}
$slquery->save();
}
}
}
$token->usesleft--;
}
$token->save();
if ($quotaexit == false) {
if ($token && trim(strip_tags($thissurvey['email_confirm'])) != "" && $thissurvey['sendconfirmation'] == "Y") {
// if($token->completed == "Y" || $token->completed == $today)
// {
$from = "{$thissurvey['adminname']} <{$thissurvey['adminemail']}>";
$subject = $thissurvey['email_confirm_subj'];
$aReplacementVars = array();
$aReplacementVars["ADMINNAME"] = $thissurvey['admin'];
$aReplacementVars["ADMINEMAIL"] = $thissurvey['adminemail'];
$aReplacementVars['ADMINEMAIL'] = $thissurvey['adminemail'];
//Fill with token info, because user can have his information with anonimity control
$aReplacementVars["FIRSTNAME"] = $token->firstname;
$aReplacementVars["LASTNAME"] = $token->lastname;
$aReplacementVars["TOKEN"] = $token->token;
// added survey url in replacement vars
$surveylink = Yii::app()->createAbsoluteUrl("/survey/index/sid/{$surveyid}", array('lang' => $_SESSION['survey_' . $surveyid]['s_lang'], 'token' => $token->token));
$aReplacementVars['SURVEYURL'] = $surveylink;
$attrfieldnames = getAttributeFieldNames($surveyid);
foreach ($attrfieldnames as $attr_name) {
$aReplacementVars[strtoupper($attr_name)] = $token->{$attr_name};
}
$dateformatdatat = getDateFormatData($thissurvey['surveyls_dateformat']);
$numberformatdatat = getRadixPointData($thissurvey['surveyls_numberformat']);
$redata = array('thissurvey' => $thissurvey);
$subject = templatereplace($subject, $aReplacementVars, $redata, '', false, null, array(), true);
$subject = html_entity_decode($subject, ENT_QUOTES, $emailcharset);
if (getEmailFormat($surveyid) == 'html') {
$ishtml = true;
} else {
$ishtml = false;
}
$message = $thissurvey['email_confirm'];
//$message=ReplaceFields($message, $fieldsarray, true);
$message = templatereplace($message, $aReplacementVars, $redata, '', false, null, array(), true);
if (!$ishtml) {
$message = strip_tags(breakToNewline(html_entity_decode($message, ENT_QUOTES, $emailcharset)));
} else {
$message = html_entity_decode($message, ENT_QUOTES, $emailcharset);
}
//Only send confirmation email if there is a valid email address
$sToAddress = validateEmailAddresses($token->email);
if ($sToAddress) {
$aAttachments = unserialize($thissurvey['attachments']);
$aRelevantAttachments = array();
/*
* Iterate through attachments and check them for relevance.
*/
if (isset($aAttachments['confirmation'])) {
foreach ($aAttachments['confirmation'] as $aAttachment) {
$relevance = $aAttachment['relevance'];
// If the attachment is relevant it will be added to the mail.
if (LimeExpressionManager::ProcessRelevance($relevance) && file_exists($aAttachment['url'])) {
$aRelevantAttachments[] = $aAttachment['url'];
}
}
}
SendEmailMessage($message, $subject, $sToAddress, $from, $sitename, $ishtml, null, $aRelevantAttachments);
}
// } else {
// Leave it to send optional confirmation at closed token
// }
}
}
}
/**
* Receives an ajax call containing the participant id in the fourth segment of the url
* Supplies list of survey links - surveys of which this participant is on the tokens table
* URL: [localurl]/limesurvey/admin/participants/getSurveyInfo_json/pid/[participant_id]
* RETURNS: json data containing linked survey information (Survey name, survey id, token_id and date_added)
*/
function getSurveyInfo_json()
{
$participantid = Yii::app()->request->getQuery('pid');
$records = SurveyLink::model()->findAllByAttributes(array('participant_id' => $participantid));
$aData = new stdClass();
$aData->page = 1;
$aData->records = count($records);
$aData->total = ceil($aData->records / 10);
$i = 0;
foreach ($records as $row) {
$oSurvey = Survey::model()->with(array('languagesettings' => array('condition' => 'surveyls_language=language')))->findByAttributes(array('sid' => $row['survey_id']));
foreach ($oSurvey->languagesettings as $oLanguageSetting) {
$surveyname = $oLanguageSetting->surveyls_title;
}
$surveylink = "";
/* Check permissions of each survey before creating a link */
if (!Permission::model()->hasSurveyPermission($row['survey_id'], 'tokens', 'read')) {
$surveylink = $row['survey_id'];
} else {
$surveylink = '<a href=' . Yii::app()->getController()->createUrl("/admin/tokens/sa/browse/surveyid/{$row['survey_id']}") . '>' . $row['survey_id'] . '</a>';
}
$aData->rows[$i]['cell'] = array($surveyname, $surveylink, $row['token_id'], $row['date_created'], $row['date_invited'], $row['date_completed']);
$i++;
}
echo ls_json_encode($aData);
}
/**
* Deletes a survey and all its data
*
* @access public
* @param int $iSurveyID
* @param bool @recursive
* @return void
*/
public function deleteSurvey($iSurveyID, $recursive = true)
{
Survey::model()->deleteByPk($iSurveyID);
if ($recursive == true) {
if (tableExists("{{survey_" . intval($iSurveyID) . "}}")) {
Yii::app()->db->createCommand()->dropTable("{{survey_" . intval($iSurveyID) . "}}");
}
if (tableExists("{{survey_" . intval($iSurveyID) . "_timings}}")) {
Yii::app()->db->createCommand()->dropTable("{{survey_" . intval($iSurveyID) . "_timings}}");
}
if (tableExists("{{tokens_" . intval($iSurveyID) . "}}")) {
Yii::app()->db->createCommand()->dropTable("{{tokens_" . intval($iSurveyID) . "}}");
}
$oResult = Question::model()->findAllByAttributes(array('sid' => $iSurveyID));
foreach ($oResult as $aRow) {
Answer::model()->deleteAllByAttributes(array('qid' => $aRow['qid']));
Condition::model()->deleteAllByAttributes(array('qid' => $aRow['qid']));
QuestionAttribute::model()->deleteAllByAttributes(array('qid' => $aRow['qid']));
DefaultValue::model()->deleteAllByAttributes(array('qid' => $aRow['qid']));
}
Question::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
Assessment::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
QuestionGroup::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
SurveyLanguageSetting::model()->deleteAllByAttributes(array('surveyls_survey_id' => $iSurveyID));
Permission::model()->deleteAllByAttributes(array('entity_id' => $iSurveyID, 'entity' => 'survey'));
SavedControl::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
SurveyURLParameter::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
//Remove any survey_links to the CPDB
SurveyLink::model()->deleteLinksBySurvey($iSurveyID);
Quota::model()->deleteQuota(array('sid' => $iSurveyID), true);
}
}
/**
* Deletes a survey and all its data
*
* @access public
* @param int $iSurveyID
* @param bool @recursive
* @return void
*/
public function deleteSurvey($iSurveyID, $recursive = true)
{
Survey::model()->deleteByPk($iSurveyID);
if ($recursive == true) {
if (tableExists("{{survey_" . intval($iSurveyID) . "}}")) {
Yii::app()->db->createCommand()->dropTable("{{survey_" . intval($iSurveyID) . "}}");
}
if (tableExists("{{survey_" . intval($iSurveyID) . "_timings}}")) {
Yii::app()->db->createCommand()->dropTable("{{survey_" . intval($iSurveyID) . "_timings}}");
}
if (tableExists("{{tokens_" . intval($iSurveyID) . "}}")) {
Yii::app()->db->createCommand()->dropTable("{{tokens_" . intval($iSurveyID) . "}}");
}
/* Remove User/global settings part : need Question and QuestionGroup*/
// Settings specific for this survey
$oCriteria = new CDbCriteria();
$oCriteria->compare('stg_name', 'last_%', true, 'AND', false);
$oCriteria->compare('stg_value', $iSurveyID, false, 'AND');
SettingGlobal::model()->deleteAll($oCriteria);
// Settings specific for this survey, 2nd part
$oCriteria = new CDbCriteria();
$oCriteria->compare('stg_name', 'last_%' . $iSurveyID . '%', true, 'AND', false);
SettingGlobal::model()->deleteAll($oCriteria);
// All Group id from this survey for ALL users
$aGroupId = CHtml::listData(QuestionGroup::model()->findAll(array('select' => 'gid', 'condition' => 'sid=:sid', 'params' => array(':sid' => $iSurveyID))), 'gid', 'gid');
$oCriteria = new CDbCriteria();
$oCriteria->compare('stg_name', 'last_question_gid_%', true, 'AND', false);
if (Yii::app()->db->getDriverName() == 'pgsql') {
$oCriteria->addInCondition('CAST(stg_value as ' . App()->db->schema->getColumnType("integer") . ')', $aGroupId);
} else {
$oCriteria->addInCondition('stg_value', $aGroupId);
}
SettingGlobal::model()->deleteAll($oCriteria);
// All Question id from this survey for ALL users
$aQuestionId = CHtml::listData(Question::model()->findAll(array('select' => 'qid', 'condition' => 'sid=:sid', 'params' => array(':sid' => $iSurveyID))), 'qid', 'qid');
$oCriteria = new CDbCriteria();
$oCriteria->compare('stg_name', 'last_question_%', true, 'OR', false);
if (Yii::app()->db->getDriverName() == 'pgsql') {
$oCriteria->addInCondition('CAST(stg_value as ' . App()->db->schema->getColumnType("integer") . ')', $aQuestionId);
} else {
$oCriteria->addInCondition('stg_value', $aQuestionId);
}
SettingGlobal::model()->deleteAll($oCriteria);
$oResult = Question::model()->findAllByAttributes(array('sid' => $iSurveyID));
foreach ($oResult as $aRow) {
Answer::model()->deleteAllByAttributes(array('qid' => $aRow['qid']));
Condition::model()->deleteAllByAttributes(array('qid' => $aRow['qid']));
QuestionAttribute::model()->deleteAllByAttributes(array('qid' => $aRow['qid']));
DefaultValue::model()->deleteAllByAttributes(array('qid' => $aRow['qid']));
}
Question::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
Assessment::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
QuestionGroup::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
SurveyLanguageSetting::model()->deleteAllByAttributes(array('surveyls_survey_id' => $iSurveyID));
Permission::model()->deleteAllByAttributes(array('entity_id' => $iSurveyID, 'entity' => 'survey'));
SavedControl::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
SurveyURLParameter::model()->deleteAllByAttributes(array('sid' => $iSurveyID));
//Remove any survey_links to the CPDB
SurveyLink::model()->deleteLinksBySurvey($iSurveyID);
Quota::model()->deleteQuota(array('sid' => $iSurveyID), true);
}
}
function deleteLinksBySurvey($surveyId)
{
$query = "DELETE FROM " . SurveyLink::tableName() . " WHERE survey_id = :survey_id";
return Yii::app()->db->createCommand($query)->bindParam(":survey_id", $surveyId)->query();
}