added NOT operator for db, elasticsearch, redis

issue #1523

extensions/yii/elasticsearch/QueryBuilder.php

@@ -139,6 +139,7 @@ class QueryBuilder extends \yii\base\Object
 	public function buildCondition($condition)
 	{
 		static $builders = array(
+			'not' => 'buildNotCondition',
 			'and' => 'buildAndCondition',
 			'or' => 'buildAndCondition',
 			'between' => 'buildBetweenCondition',
@@ -196,6 +197,19 @@ class QueryBuilder extends \yii\base\Object
 		return count($parts) === 1 ? $parts[0] : ['and' => $parts];
 	}
 
+	private function buildNotCondition($operator, $operands, &$params)
+	{
+		if (count($operands) != 1) {
+			throw new InvalidParamException("Operator '$operator' requires exactly one operand.");
+		}
+
+		$operand = reset($operands);
+		if (is_array($operand)) {
+			$operand = $this->buildCondition($operand, $params);
+		}
+		return [$operator => $operand];
+	}
+
 	private function buildAndCondition($operator, $operands)
 	{
 		$parts = [];

extensions/yii/redis/LuaScriptBuilder.php

@@ -219,6 +219,7 @@ EOF;
 	public function buildCondition($condition, &$columns)
 	{
 		static $builders = [
+			'not' => 'buildNotCondition',
 			'and' => 'buildAndCondition',
 			'or' => 'buildAndCondition',
 			'between' => 'buildBetweenCondition',
@@ -269,6 +270,19 @@ EOF;
 		return count($parts) === 1 ? $parts[0] : '(' . implode(') and (', $parts) . ')';
 	}
 
+	private function buildNotCondition($operator, $operands, &$params)
+	{
+		if (count($operands) != 1) {
+			throw new InvalidParamException("Operator '$operator' requires exactly one operand.");
+		}
+
+		$operand = reset($operands);
+		if (is_array($operand)) {
+			$operand = $this->buildCondition($operand, $params);
+		}
+		return "!($operand)";
+	}
+
 	private function buildAndCondition($operator, $operands, &$columns)
 	{
 		$parts = [];

framework/CHANGELOG.md

@@ -14,6 +14,7 @@ Yii Framework 2 Change Log
 - Enh #1406: DB Schema support for Oracle Database (p0larbeer, qiangxue)
 - Enh #1437: Added ListView::viewParams (qiangxue)
 - Enh #1469: ActiveRecord::find() now works with default conditions (default scope) applied by createQuery (cebe)
+- Enh #1523: Query conditions now allow to use the NOT operator (cebe)
 - Enh #1552: It is now possible to use multiple bootstrap NavBar in a single page (Alex-Code)
 - Enh: Added `favicon.ico` and `robots.txt` to defauly application templates (samdark)
 - Enh: Added `Widget::autoIdPrefix` to support prefixing automatically generated widget IDs (qiangxue)

framework/yii/db/QueryBuilder.php

@@ -788,6 +788,7 @@ class QueryBuilder extends \yii\base\Object
 	public function buildCondition($condition, &$params)
 	{
 		static $builders = [
+			'NOT' => 'buildNotCondition',
 			'AND' => 'buildAndCondition',
 			'OR' => 'buildAndCondition',
 			'BETWEEN' => 'buildBetweenCondition',
@@ -878,6 +879,30 @@ class QueryBuilder extends \yii\base\Object
 	}
 
 	/**
+	 * Inverts an SQL expressions with `NOT` operator.
+	 * @param string $operator the operator to use for connecting the given operands
+	 * @param array $operands the SQL expressions to connect.
+	 * @param array $params the binding parameters to be populated
+	 * @return string the generated SQL expression
+	 * @throws InvalidParamException if wrong number of operands have been given.
+	 */
+	public function buildNotCondition($operator, $operands, &$params)
+	{
+		if (count($operands) != 1) {
+			throw new InvalidParamException("Operator '$operator' requires exactly one operand.");
+		}
+
+		$operand = reset($operands);
+		if (is_array($operand)) {
+			$operand = $this->buildCondition($operand, $params);
+		}
+		if ($operand === '') {
+			return '';
+		}
+		return "$operator ($operand)";
+	}
+
+	/**
 	 * Creates an SQL expressions with the `BETWEEN` operator.
 	 * @param string $operator the operator to use (e.g. `BETWEEN` or `NOT BETWEEN`)
 	 * @param array $operands the first operand is the column name. The second and third operands