Class yii\db\mssql\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 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; }