Class yii\db\conditions\InConditionBuilder

 public function __construct(QueryBuilder $queryBuilder)
{
 $this->queryBuilder = $queryBuilder;
}

 

 public function build(ExpressionInterface $expression, array &$params = [])
{
 $operator = strtoupper($expression->getOperator());
 $column = $expression->getColumn();
 $values = $expression->getValues();
 if ($column === []) {
 // no columns to test against
 return $operator === 'IN' ? '0=1' : '';
 }
 if ($values instanceof Query) {
 return $this->buildSubqueryInCondition($operator, $column, $values, $params);
 }
 if (!is_array($values) && !$values instanceof \Traversable) {
 // ensure values is an array
 $values = (array) $values;
 }
 if (is_array($column)) {
 if (count($column) > 1) {
 return $this->buildCompositeInCondition($operator, $column, $values, $params);
 }
 $column = reset($column);
 }
 if ($column instanceof \Traversable) {
 if (iterator_count($column) > 1) {
 return $this->buildCompositeInCondition($operator, $column, $values, $params);
 }
 $column->rewind();
 $column = $column->current();
 }
 if ($column instanceof Expression) {
 $column = $column->expression;
 }
 if (is_array($values)) {
 $rawValues = $values;
 } elseif ($values instanceof \Traversable) {
 $rawValues = $this->getRawValuesFromTraversableObject($values);
 }
 $nullCondition = null;
 $nullConditionOperator = null;
 if (isset($rawValues) && in_array(null, $rawValues, true)) {
 $nullCondition = $this->getNullCondition($operator, $column);
 $nullConditionOperator = $operator === 'IN' ? 'OR' : 'AND';
 }
 $sqlValues = $this->buildValues($expression, $values, $params);
 if (empty($sqlValues)) {
 if ($nullCondition === null) {
 return $operator === 'IN' ? '0=1' : '';
 }
 return $nullCondition;
 }
 if (strpos($column, '(') === false) {
 $column = $this->queryBuilder->db->quoteColumnName($column);
 }
 if (count($sqlValues) > 1) {
 $sql = "$column $operator (" . implode(', ', $sqlValues) . ')';
 } else {
 $operator = $operator === 'IN' ? '=' : '<>';
 $sql = $column . $operator . reset($sqlValues);
 }
 return $nullCondition !== null && $nullConditionOperator !== null
 ? sprintf('%s %s %s', $sql, $nullConditionOperator, $nullCondition)
 : $sql;
}

 

 protected function buildCompositeInCondition($operator, $columns, $values, &$params)
{
 $vss = [];
 foreach ($values as $value) {
 $vs = [];
 foreach ($columns as $column) {
 if ($column instanceof Expression) {
 $column = $column->expression;
 }
 if (isset($value[$column])) {
 $vs[] = $this->queryBuilder->bindParam($value[$column], $params);
 } else {
 $vs[] = 'NULL';
 }
 }
 $vss[] = '(' . implode(', ', $vs) . ')';
 }
 if (empty($vss)) {
 return $operator === 'IN' ? '0=1' : '';
 }
 $sqlColumns = [];
 foreach ($columns as $i => $column) {
 if ($column instanceof Expression) {
 $column = $column->expression;
 }
 $sqlColumns[] = strpos($column, '(') === false ? $this->queryBuilder->db->quoteColumnName($column) : $column;
 }
 return '(' . implode(', ', $sqlColumns) . ") $operator (" . implode(', ', $vss) . ')';
}

 

 protected function buildSubqueryInCondition($operator, $columns, $values, &$params)
{
 $sql = $this->queryBuilder->buildExpression($values, $params);
 if (is_array($columns)) {
 foreach ($columns as $i => $col) {
 if ($col instanceof Expression) {
 $col = $col->expression;
 }
 if (strpos($col, '(') === false) {
 $columns[$i] = $this->queryBuilder->db->quoteColumnName($col);
 }
 }
 return '(' . implode(', ', $columns) . ") $operator $sql";
 }
 if ($columns instanceof Expression) {
 $columns = $columns->expression;
 }
 if (strpos($columns, '(') === false) {
 $columns = $this->queryBuilder->db->quoteColumnName($columns);
 }
 return "$columns $operator $sql";
}

 

 protected function buildValues(ConditionInterface $condition, $values, &$params)
{
 $sqlValues = [];
 $column = $condition->getColumn();
 if (is_array($column)) {
 $column = reset($column);
 }
 if ($column instanceof \Traversable) {
 $column->rewind();
 $column = $column->current();
 }
 if ($column instanceof Expression) {
 $column = $column->expression;
 }
 foreach ($values as $i => $value) {
 if (is_array($value) || $value instanceof \ArrayAccess) {
 $value = isset($value[$column]) ? $value[$column] : null;
 }
 if ($value === null) {
 continue;
 } elseif ($value instanceof ExpressionInterface) {
 $sqlValues[$i] = $this->queryBuilder->buildExpression($value, $params);
 } else {
 $sqlValues[$i] = $this->queryBuilder->bindParam($value, $params);
 }
 }
 return $sqlValues;
}

 

 protected function getNullCondition($operator, $column)
{
 $column = $this->queryBuilder->db->quoteColumnName($column);
 if ($operator === 'IN') {
 return sprintf('%s IS NULL', $column);
 }
 return sprintf('%s IS NOT NULL', $column);
}

 

 protected function getRawValuesFromTraversableObject(\Traversable $traversableObject)
{
 $rawValues = [];
 foreach ($traversableObject as $value) {
 if (is_array($value)) {
 $values = array_values($value);
 $rawValues = array_merge($rawValues, $values);
 } else {
 $rawValues[] = $value;
 }
 }
 return $rawValues;
}