Friendica/friendica-github
1
0
Fork 0
mirror of https://github.com/friendica/friendica synced 2025-04-27 11:50:11 +00:00
Code Issues Projects Releases Packages Wiki Activity

Fixes several database errors, removes "relation" handling

Browse source
This commit is contained in:
Michael 2021-02-25 05:13:49 +00:00
parent de90f5351f
commit 99a145f7cf
11 changed files with 39 additions and 176 deletions
Download patch file Download diff file Expand all files Collapse all files

158
src/Database/Database.php
View file

@ -1217,175 +1217,29 @@ class Database
return $ret;
}
/**
* Build the array with the table relations
*
* The array is build from the database definitions in DBStructure.php
*
* This process must only be started once, since the value is cached.
*/
private function buildRelationData()
{
$definition = DBStructure::definition($this->configCache->get('system', 'basepath'));
foreach ($definition AS $table => $structure) {
foreach ($structure['fields'] AS $field => $field_struct) {
if (isset($field_struct['relation'])) {
foreach ($field_struct['relation'] AS $rel_table => $rel_field) {
$this->relation[$rel_table][$rel_field][$table][] = $field;
}
}
}
}
}
/**
* Delete a row from a table
*
* Note: this methods does NOT accept schema => table arrays because of the complex relation stuff.
*
* @param string $table Table name
* @param array $conditions Field condition(s)
* @param array $options
* - cascade: If true we delete records in other tables that depend on the one we're deleting through
* relations (default: true)
* @param array $callstack Internal use: prevent endless loops
*
* @return boolean was the delete successful?
* @throws \Exception
*/
public function delete($table, array $conditions, array $options = [], array &$callstack = [])
public function delete($table, array $conditions)
{
if (empty($table) || empty($conditions)) {
$this->logger->info('Table and conditions have to be set');
return false;
}
$commands = [];
$table_string = DBA::buildTableString($table);
// Create a key for the loop prevention
$key = $table . ':' . json_encode($conditions);
$condition_string = DBA::buildCondition($conditions);
// We quit when this key already exists in the callstack.
if (isset($callstack[$key])) {
return true;
}
$callstack[$key] = true;
$commands[$key] = ['table' => $table, 'conditions' => $conditions];
// Don't use "defaults" here, since it would set "false" to "true"
if (isset($options['cascade'])) {
$cascade = $options['cascade'];
} else {
$cascade = true;
}
// To speed up the whole process we cache the table relations
if ($cascade && count($this->relation) == 0) {
$this->buildRelationData();
}
// Is there a relation entry for the table?
if ($cascade && isset($this->relation[$table])) {
// We only allow a simple "one field" relation.
$field = array_keys($this->relation[$table])[0];
$rel_def = array_values($this->relation[$table])[0];
// Create a key for preventing double queries
$qkey = $field . '-' . $table . ':' . json_encode($conditions);
// When the search field is the relation field, we don't need to fetch the rows
// This is useful when the leading record is already deleted in the frontend but the rest is done in the backend
if ((count($conditions) == 1) && ($field == array_keys($conditions)[0])) {
foreach ($rel_def AS $rel_table => $rel_fields) {
foreach ($rel_fields AS $rel_field) {
$this->delete($rel_table, [$rel_field => array_values($conditions)[0]], $options, $callstack);
}
}
// We quit when this key already exists in the callstack.
} elseif (!isset($callstack[$qkey])) {
$callstack[$qkey] = true;
// Fetch all rows that are to be deleted
$data = $this->select($table, [$field], $conditions);
while ($row = $this->fetch($data)) {
$this->delete($table, [$field => $row[$field]], $options, $callstack);
}
$this->close($data);
// Since we had split the delete command we don't need the original command anymore
unset($commands[$key]);
}
}
// Now we finalize the process
$do_transaction = !$this->in_transaction;
if ($do_transaction) {
$this->transaction();
}
$compacted = [];
$counter = [];
foreach ($commands AS $command) {
$conditions = $command['conditions'];
reset($conditions);
$first_key = key($conditions);
$condition_string = DBA::buildCondition($conditions);
if ((count($command['conditions']) > 1) || is_int($first_key)) {
$sql = "DELETE FROM " . DBA::quoteIdentifier($command['table']) . " " . $condition_string;
$this->logger->info($this->replaceParameters($sql, $conditions), ['callstack' => System::callstack(6), 'internal_callstack' => $callstack]);
if (!$this->e($sql, $conditions)) {
if ($do_transaction) {
$this->rollback();
}
return false;
}
} else {
$key_table = $command['table'];
$key_condition = array_keys($command['conditions'])[0];
$value = array_values($command['conditions'])[0];
// Split the SQL queries in chunks of 100 values
// We do the $i stuff here to make the code better readable
$i = isset($counter[$key_table][$key_condition]) ? $counter[$key_table][$key_condition] : 0;
if (isset($compacted[$key_table][$key_condition][$i]) && count($compacted[$key_table][$key_condition][$i]) > 100) {
++$i;
}
$compacted[$key_table][$key_condition][$i][$value] = $value;
$counter[$key_table][$key_condition] = $i;
}
}
foreach ($compacted AS $table => $values) {
foreach ($values AS $field => $field_value_list) {
foreach ($field_value_list AS $field_values) {
$sql = "DELETE FROM " . DBA::quoteIdentifier($table) . " WHERE " . DBA::quoteIdentifier($field) . " IN (" .
substr(str_repeat("?, ", count($field_values)), 0, -2) . ");";
$this->logger->info($this->replaceParameters($sql, $field_values), ['callstack' => System::callstack(6), 'internal_callstack' => $callstack]);
if (!$this->e($sql, $field_values)) {
if ($do_transaction) {
$this->rollback();
}
return false;
}
}
}
}
if ($do_transaction) {
$this->commit();
}
return true;
$sql = "DELETE FROM " . $table_string . " " . $condition_string;
$this->logger->debug($this->replaceParameters($sql, $conditions), ['callstack' => System::callstack(6)]);
return $this->e($sql, $conditions);
}
/**