/**
* Builds the SQL for the join this object represents.
*
* When possible, try to use table alias instead of table names.
*
* @param $select_query
* An select query object.
* @param $table
* The base table to join.
* @param \Drupal\views\Plugin\views\query\QueryPluginBase $view_query
* The source views query.
*/
public function buildJoin($select_query, $table, $view_query)
{
if (empty($this->configuration['table formula'])) {
$right_table = $this->table;
} else {
$right_table = $this->configuration['table formula'];
}
if ($this->leftTable) {
$left = $view_query->getTableInfo($this->leftTable);
$left_field = "{$left['alias']}.{$this->leftField}";
} else {
// This can be used if left_field is a formula or something. It should be used only *very* rarely.
$left_field = $this->leftField;
}
$condition = "{$left_field} = {$table['alias']}.{$this->field}";
$arguments = array();
// Tack on the extra.
if (isset($this->extra)) {
if (is_array($this->extra)) {
$extras = array();
foreach ($this->extra as $info) {
// Figure out the table name. Remember, only use aliases provided
// if at all possible.
$join_table = '';
if (!array_key_exists('table', $info)) {
$join_table = $table['alias'] . '.';
} elseif (isset($info['table'])) {
// If we're aware of a table alias for this table, use the table
// alias instead of the table name.
if (isset($left) && $left['table'] == $info['table']) {
$join_table = $left['alias'] . '.';
} else {
$join_table = $info['table'] . '.';
}
}
// Convert a single-valued array of values to the single-value case,
// and transform from IN() notation to = notation
if (is_array($info['value']) && count($info['value']) == 1) {
if (empty($info['operator'])) {
$operator = '=';
} else {
$operator = $info['operator'] == 'NOT IN' ? '!=' : '=';
}
$info['value'] = array_shift($info['value']);
}
if (is_array($info['value'])) {
// With an array of values, we need multiple placeholders and the
// 'IN' operator is implicit.
foreach ($info['value'] as $value) {
$placeholder_i = ':views_join_condition_' . $select_query->nextPlaceholder();
$arguments[$placeholder_i] = $value;
}
$operator = !empty($info['operator']) ? $info['operator'] : 'IN';
$placeholder = '( ' . implode(', ', array_keys($arguments)) . ' )';
} else {
// With a single value, the '=' operator is implicit.
$operator = !empty($info['operator']) ? $info['operator'] : '=';
$placeholder = ':views_join_condition_' . $select_query->nextPlaceholder();
$arguments[$placeholder] = $info['value'];
}
$extras[] = "{$join_table}{$info['field']} {$operator} {$placeholder}";
}
if ($extras) {
if (count($extras) == 1) {
$condition .= ' AND ' . array_shift($extras);
} else {
$condition .= ' AND (' . implode(' ' . $this->extraOperator . ' ', $extras) . ')';
}
}
} elseif ($this->extra && is_string($this->extra)) {
$condition .= " AND ({$this->extra})";
}
}
$select_query->addJoin($this->type, $right_table, $table['alias'], $condition, $arguments);
}