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#67895 patch by myself, tested by JirkaRybka and blackdog: move poll votes with poll options, when an option is removed, instead of dropping all old votes, solving an old data loss bug

6.x
Gábor Hojtsy 2007-12-17 21:58:38 +00:00
parent 33839435ee
commit cf790b5a09
1 changed files with 21 additions and 7 deletions
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28
modules/poll/poll.module
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@ -396,15 +396,15 @@ function poll_validate($node) {
function poll_load($node) {
global $user;
// Load the appropriate choices into the $node object
$poll = db_fetch_object(db_query("SELECT runtime, active FROM {poll} WHERE nid = %d", $node->nid));
// Load the appropriate choices into the $poll object.
$result = db_query("SELECT chtext, chvotes, chorder FROM {poll_choices} WHERE nid = %d ORDER BY chorder", $node->nid);
while ($choice = db_fetch_array($result)) {
$poll->choice[$choice['chorder']] = $choice;
}
// Determine whether or not this user is allowed to vote
// Determine whether or not this user is allowed to vote.
$poll->allowvotes = FALSE;
if (user_access('vote on polls') && $poll->active) {
if ($user->uid) {
@ -450,18 +450,32 @@ function poll_insert($node) {
* Implementation of hook_update().
*/
function poll_update($node) {
// Update poll settings.
db_query('UPDATE {poll} SET runtime = %d, active = %d WHERE nid = %d', $node->runtime, $node->active, $node->nid);
// Clean poll choices.
db_query('DELETE FROM {poll_choices} WHERE nid = %d', $node->nid);
db_query('DELETE FROM {poll_votes} WHERE nid = %d', $node->nid);
$i = 0;
foreach ($node->choice as $choice) {
// Poll choices come in the same order with the same numbers as they are in
// the database, but some might have an empty title, which signifies that
// they should be removed. We remove all votes to the removed options, so
// people who voted on them can vote again.
$new_chorder = 0;
foreach ($node->choice as $old_chorder => $choice) {
$chvotes = isset($choice['chvotes']) ? (int)$choice['chvotes'] : 0;
$chtext = $choice['chtext'];
if ($chtext != '') {
db_query("INSERT INTO {poll_choices} (nid, chtext, chvotes, chorder) VALUES (%d, '%s', %d, %d)", $node->nid, $chtext, $chvotes, $i++);
if (!empty($chtext)) {
db_query("INSERT INTO {poll_choices} (nid, chtext, chvotes, chorder) VALUES (%d, '%s', %d, %d)", $node->nid, $chtext, $chvotes, $new_chorder);
if ($new_chorder != $old_chorder) {
// We can only remove items in the middle, not add, so
// new_chorder is always <= old_chorder, making this safe.
db_query("UPDATE {poll_votes} SET chorder = %d WHERE nid = %d AND chorder = %d", $new_chorder, $node->nid, $old_chorder);
}
$new_chorder++;
}
else {
db_query("DELETE FROM {poll_votes} WHERE nid = %d AND chorder = %d", $node->nid, $old_chorder);
}
}
}