more on elasticsearch Query interface added facet search

framework/yii/db/ActiveRecord.php

@@ -132,7 +132,7 @@ class ActiveRecord extends Model
 	 *  - an array of name-value pairs: query by a set of column values and return a single record matching all of them.
 	 *  - null: return a new [[ActiveQuery]] object for further query purpose.
 	 *
-	 * @return ActiveQuery|ActiveQueryInterface|static|null When `$q` is null, a new [[ActiveQuery]] instance
+	 * @return ActiveQuery|ActiveRecord|null When `$q` is null, a new [[ActiveQuery]] instance
 	 * is returned; when `$q` is a scalar or an array, an ActiveRecord object matching it will be
 	 * returned (null will be returned if there is no matching).
 	 * @throws InvalidConfigException if the AR class does not have a primary key

framework/yii/db/QueryBuilder.php

@@ -7,6 +7,7 @@
 
 namespace yii\db;
 
+use yii\base\InvalidParamException;
 use yii\base\NotSupportedException;
 
 /**
@@ -761,7 +762,7 @@ class QueryBuilder extends \yii\base\Object
 	 * on how to specify a condition.
 	 * @param array $params the binding parameters to be populated
 	 * @return string the generated SQL expression
-	 * @throws \yii\db\Exception if the condition is in bad format
+	 * @throws InvalidParamException if the condition is in bad format
 	 */
 	public function buildCondition($condition, &$params)
 	{
@@ -790,7 +791,7 @@ class QueryBuilder extends \yii\base\Object
 				array_shift($condition);
 				return $this->$method($operator, $condition, $params);
 			} else {
-				throw new Exception('Found unknown operator in query: ' . $operator);
+				throw new InvalidParamException('Found unknown operator in query: ' . $operator);
 			}
 		} else { // hash format: 'column1' => 'value1', 'column2' => 'value2', ...
 			return $this->buildHashCondition($condition, $params);

framework/yii/elasticsearch/ActiveQuery.php

@@ -71,8 +71,8 @@ class ActiveQuery extends Query implements ActiveQueryInterface
 			$this->index = $modelClass::index();
 			$this->type = $modelClass::type();
 		}
-		$query = $db->getQueryBuilder()->build($this);
-		return $db->createCommand($query, $this->index, $this->type);
+		$commandConfig = $db->getQueryBuilder()->build($this);
+		return $db->createCommand($commandConfig);
 	}
 
 	/**

framework/yii/elasticsearch/ActiveRecord.php

@@ -110,6 +110,10 @@ class ActiveRecord extends \yii\db\ActiveRecord
 		return $models;
 	}
 
+	// TODO add more like this feature http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-more-like-this.html
+
+	// TODO add percolate functionality http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-percolate.html
+
 	/**
 	 * @inheritDoc
 	 */

framework/yii/elasticsearch/Command.php

@@ -6,6 +6,7 @@
 namespace yii\elasticsearch;
 
 
+use Guzzle\Http\Exception\ClientErrorResponseException;
 use yii\base\Component;
 use yii\db\Exception;
 use yii\helpers\Json;
@@ -35,15 +36,16 @@ class Command extends Component
 	 * @var string|array the types to execute the query on. Defaults to null meaning all types
 	 */
 	public $type;
-
 	/**
-	 * @var array|string array or json
+	 * @var array list of arrays or json strings that become parts of a query
 	 */
-	public $query;
+	public $queryParts;
+
+	public $options = [];
 
 	public function queryAll($options = [])
 	{
-		$query = $this->query;
+		$query = $this->queryParts;
 		if (empty($query)) {
 			$query = '{}';
 		}
@@ -55,7 +57,11 @@ class Command extends Component
 			$this->type !== null ? $this->type : '_all',
 			'_search'
 		];
-		$response = $this->db->http()->post($this->createUrl($url, $options), null, $query)->send();
+		try {
+			$response = $this->db->http()->post($this->createUrl($url, $options), null, $query)->send();
+		} catch(ClientErrorResponseException $e) {
+			throw new Exception("elasticsearch error:\n\n" . $query . "\n\n" . $e->getMessage() . $e->getResponse()->getBody(true), [], 0, $e);
+		}
 		return Json::decode($response->getBody(true))['hits'];
 	}
 
@@ -405,7 +411,8 @@ class Command extends Component
 			return urlencode(is_array($a) ? implode(',', $a) : $a);
 		}, $path));
 
-		if (!empty($options)) {
+		if (!empty($options) || !empty($this->options)) {
+			$options = array_merge($this->options, $options);
 			$url .= '?' . http_build_query($options);
 		}
 

framework/yii/elasticsearch/Connection.php

@@ -58,15 +58,11 @@ class Connection extends Component
 	 * @param string $query the SQL statement to be executed
 	 * @return Command the DB command
 	 */
-	public function createCommand($query = null, $index = null, $type = null)
+	public function createCommand($config = [])
 	{
 		$this->open();
-		$command = new Command(array(
-			'db' => $this,
-			'query' => $query,
-			'index' => $index,
-			'type' => $type,
-		));
+		$config['db'] = $this;
+		$command = new Command($config);
 		return $command;
 	}
 

framework/yii/elasticsearch/Query.php

@@ -50,6 +50,16 @@ class Query extends Component implements QueryInterface
 	 */
 	public $timeout;
 
+	public $query;
+
+	public $filter;
+
+	public $facets = [];
+
+	public $facetResults = [];
+
+	public $totalCount;
+
 	/**
 	 * Creates a DB command that can be used to execute this query.
 	 * @param Connection $db the database connection used to execute the query.
@@ -62,8 +72,8 @@ class Query extends Component implements QueryInterface
 			$db = Yii::$app->getComponent('elasticsearch');
 		}
 
-		$query = $db->getQueryBuilder()->build($this);
-		return $db->createCommand($query, $this->index, $this->type);
+		$commandConfig = $db->getQueryBuilder()->build($this);
+		return $db->createCommand($commandConfig);
 	}
 
 	/**
@@ -74,11 +84,13 @@ class Query extends Component implements QueryInterface
 	 */
 	public function all($db = null)
 	{
-		$rows = $this->createCommand($db)->queryAll()['hits'];
+		$result = $this->createCommand($db)->queryAll();
+		// TODO publish facet results
+		$rows = $result['hits'];
 		if ($this->indexBy === null && $this->fields === null) {
 			return $rows;
 		}
-		$result = [];
+		$models = [];
 		foreach ($rows as $key => $row) {
 			if ($this->fields !== null) {
 				$row['_source'] = isset($row['fields']) ? $row['fields'] : [];
@@ -91,9 +103,9 @@ class Query extends Component implements QueryInterface
 					$key = call_user_func($this->indexBy, $row);
 				}
 			}
-			$result[$key] = $row;
+			$models[$key] = $row;
 		}
-		return $result;
+		return $models;
 	}
 
 	/**
@@ -107,6 +119,7 @@ class Query extends Component implements QueryInterface
 	{
 		$options['size'] = 1;
 		$result = $this->createCommand($db)->queryAll($options);
+		// TODO publish facet results
 		if (empty($result['hits'])) {
 			return false;
 		}
@@ -119,6 +132,20 @@ class Query extends Component implements QueryInterface
 	}
 
 	/**
+	 * Executes the query and deletes all matching documents.
+	 *
+	 * This will not run facet queries.
+	 *
+	 * @param Connection $db the database connection used to execute the query.
+	 * If this parameter is not given, the `elasticsearch` application component will be used.
+	 * @return array the query results. If the query results in nothing, an empty array will be returned.
+	 */
+	public function delete($db = null)
+	{
+		// TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-delete-by-query.html
+	}
+
+	/**
 	 * Returns the query result as a scalar value.
 	 * The value returned will be the specified field in the first document of the query results.
 	 * @param string $field name of the attribute to select
@@ -146,11 +173,12 @@ class Query extends Component implements QueryInterface
 	 */
 	public function column($field, $db = null)
 	{
-		$query = clone $this;
-		$rows = $query->fields([$field])->createCommand($db)->queryAll()['hits'];
+		$command = $this->createCommand($db);
+		$command->queryParts['fields'] = [$field];
+		$rows = $command->queryAll()['hits'];
 		$result = [];
 		foreach ($rows as $row) {
-			$result[] = $row['fields'][$field];
+			$result[] = isset($row['fields'][$field]) ? $row['fields'][$field] : null;
 		}
 		return $result;
 	}
@@ -164,6 +192,10 @@ class Query extends Component implements QueryInterface
 	 */
 	public function count($q = '*', $db = null)
 	{
+		// TODO consider sending to _count api instead of _search for performance
+		// only when no facety are registerted.
+		// http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-count.html
+
 		$count = $this->createCommand($db)->queryCount()['total'];
 		if ($this->limit === null && $this->offset === null) {
 			return $count;
@@ -173,84 +205,156 @@ class Query extends Component implements QueryInterface
 		return $this->limit === null ? $count : ($this->limit > $count ? $count : $this->limit);
 	}
 
-
 	/**
-	 * Returns the sum of the specified column values.
-	 * @param string $q the column name or expression.
-	 * Make sure you properly quote column names in the expression.
+	 * Returns a value indicating whether the query result contains any row of data.
 	 * @param Connection $db the database connection used to execute the query.
 	 * If this parameter is not given, the `elasticsearch` application component will be used.
-	 * @return integer the sum of the specified column values
+	 * @return boolean whether the query result contains any row of data.
 	 */
-	public function sum($q, $db = null)
+	public function exists($db = null)
 	{
-		$this->select = ["SUM($q)"];
-		return $this->createCommand($db)->queryScalar();
+		return self::one($db) !== false;
 	}
 
 	/**
-	 * Returns the average of the specified column values.
-	 * @param string $q the column name or expression.
-	 * Make sure you properly quote column names in the expression.
-	 * @param Connection $db the database connection used to execute the query.
-	 * If this parameter is not given, the `elasticsearch` application component will be used.
-	 * @return integer the average of the specified column values.
+	 * Adds a facet search to this query.
+	 * @param string $name the name of this facet
+	 * @param string $type the facet type. e.g. `terms`, `range`, `histogram`...
+	 * @param string|array $options the configuration options for this facet. Can be an array or a json string.
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-query-facet.html
 	 */
-	public function average($q, $db = null)
+	public function addFacet($name, $type, $options)
 	{
-		$this->select = ["AVG($q)"];
-		return $this->createCommand($db)->queryScalar();
+		$this->facets[$name] = [$type => $options];
+		return $this;
 	}
 
 	/**
-	 * Returns the minimum of the specified column values.
-	 * @param string $q the column name or expression.
-	 * Make sure you properly quote column names in the expression.
-	 * @param Connection $db the database connection used to execute the query.
-	 * If this parameter is not given, the `elasticsearch` application component will be used.
-	 * @return integer the minimum of the specified column values.
+	 * The `terms facet` allow to specify field facets that return the N most frequent terms.
+	 * @param string $name the name of this facet
+	 * @param array $options additional option. Please refer to the elasticsearch documentation for details.
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-terms-facet.html
 	 */
-	public function min($q, $db = null)
+	public function addTermFacet($name, $options)
 	{
-		$this->select = ["MIN($q)"];
-		return $this->createCommand($db)->queryScalar();
+		return $this->addFacet($name, 'terms', $options);
 	}
 
 	/**
-	 * Returns the maximum of the specified column values.
-	 * @param string $q the column name or expression.
-	 * Make sure you properly quote column names in the expression.
-	 * @param Connection $db the database connection used to execute the query.
-	 * If this parameter is not given, the `elasticsearch` application component will be used.
-	 * @return integer the maximum of the specified column values.
+	 * Range facet allows to specify a set of ranges and get both the number of docs (count) that fall
+	 * within each range, and aggregated data either based on the field, or using another field.
+	 * @param string $name the name of this facet
+	 * @param array $options additional option. Please refer to the elasticsearch documentation for details.
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-range-facet.html
 	 */
-	public function max($q, $db = null)
+	public function addRangeFacet($name, $options)
 	{
-		$this->select = ["MAX($q)"];
-		return $this->createCommand($db)->queryScalar();
+		return $this->addFacet($name, 'range', $options);
 	}
 
 	/**
-	 * Returns a value indicating whether the query result contains any row of data.
-	 * @param Connection $db the database connection used to execute the query.
-	 * If this parameter is not given, the `elasticsearch` application component will be used.
-	 * @return boolean whether the query result contains any row of data.
+	 * The histogram facet works with numeric data by building a histogram across intervals of the field values.
+	 * Each value is "rounded" into an interval (or placed in a bucket), and statistics are provided per
+	 * interval/bucket (count and total).
+	 * @param string $name the name of this facet
+	 * @param array $options additional option. Please refer to the elasticsearch documentation for details.
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-histogram-facet.html
 	 */
-	public function exists($db = null)
+	public function addHistogramFacet($name, $options)
 	{
-		// TODO check for exists
-		return $this->one($db) !== null;
+		return $this->addFacet($name, 'histogram', $options);
 	}
 
 	/**
-	 * Executes the query and returns all results as an array.
-	 * @param Connection $db the database connection used to execute the query.
-	 * If this parameter is not given, the `elasticsearch` application component will be used.
-	 * @return array the query results. If the query results in nothing, an empty array will be returned.
+	 * A specific histogram facet that can work with date field types enhancing it over the regular histogram facet.
+	 * @param string $name the name of this facet
+	 * @param array $options additional option. Please refer to the elasticsearch documentation for details.
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-date-histogram-facet.html
 	 */
-	public function delete($db = null)
+	public function addDateHistogramFacet($name, $options)
 	{
-		// TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-delete-by-query.html
+		return $this->addFacet($name, 'date_histogram', $options);
+	}
+
+	/**
+	 * A filter facet (not to be confused with a facet filter) allows you to return a count of the hits matching the filter.
+	 * The filter itself can be expressed using the Query DSL.
+	 * @param string $name the name of this facet
+	 * @param string $filter the query in Query DSL
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-filter-facet.html
+	 */
+	public function addFilterFacet($name, $filter)
+	{
+		return $this->addFacet($name, 'filter', $filter);
+	}
+
+	/**
+	 * A facet query allows to return a count of the hits matching the facet query.
+	 * The query itself can be expressed using the Query DSL.
+	 * @param string $name the name of this facet
+	 * @param string $query the query in Query DSL
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-query-facet.html
+	 */
+	public function addQueryFacet($name, $query)
+	{
+		return $this->addFacet($name, 'query', $query);
+	}
+
+	/**
+	 * Statistical facet allows to compute statistical data on a numeric fields. The statistical data include count,
+	 * total, sum of squares, mean (average), minimum, maximum, variance, and standard deviation.
+	 * @param string $name the name of this facet
+	 * @param array $options additional option. Please refer to the elasticsearch documentation for details.
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-statistical-facet.html
+	 */
+	public function addStatisticalFacet($name, $options)
+	{
+		return $this->addFacet($name, 'statistical', $options);
+	}
+
+	/**
+	 * The `terms_stats` facet combines both the terms and statistical allowing to compute stats computed on a field,
+	 * per term value driven by another field.
+	 * @param string $name the name of this facet
+	 * @param array $options additional option. Please refer to the elasticsearch documentation for details.
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-terms-stats-facet.html
+	 */
+	public function addTermsStatsFacet($name, $options)
+	{
+		return $this->addFacet($name, 'terms_stats', $options);
+	}
+
+	/**
+	 * The `geo_distance` facet is a facet providing information for ranges of distances from a provided `geo_point`
+	 * including count of the number of hits that fall within each range, and aggregation information (like `total`).
+	 * @param string $name the name of this facet
+	 * @param array $options additional option. Please refer to the elasticsearch documentation for details.
+	 * @return static
+	 * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-geo-distance-facet.html
+	 */
+	public function addGeoDistanceFacet($name, $options)
+	{
+		return $this->addFacet($name, 'geo_distance', $options);
+	}
+
+	// TODO add suggesters http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-suggesters.html
+
+	// TODO add validate query http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-validate.html
+
+	// TODO support multi query via static method http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-multi-search.html
+
+	public function query()
+	{
+
 	}
 
 	/**

framework/yii/elasticsearch/QueryBuilder.php

@@ -7,15 +7,14 @@
 
 namespace yii\elasticsearch;
 
+use yii\base\InvalidParamException;
 use yii\base\NotSupportedException;
 
 /**
- * QueryBuilder builds a SELECT SQL statement based on the specification given as a [[Query]] object.
+ * QueryBuilder builds an elasticsearch query based on the specification given as a [[Query]] object.
  *
- * QueryBuilder can also be used to build SQL statements such as INSERT, UPDATE, DELETE, CREATE TABLE,
- * from a [[Query]] object.
  *
- * @author Qiang Xue <qiang.xue@gmail.com>
+ * @author Carsten Brandt <mail@cebe.cc>
  * @since 2.0
  */
 class QueryBuilder extends \yii\base\Object
@@ -30,105 +29,51 @@ class QueryBuilder extends \yii\base\Object
 	 * @param Connection $connection the database connection.
 	 * @param array $config name-value pairs that will be used to initialize the object properties
 	 */
-	public function __construct($connection, $config = array())
+	public function __construct($connection, $config = [])
 	{
 		$this->db = $connection;
 		parent::__construct($config);
 	}
 
 	/**
-	 * Generates a SELECT SQL statement from a [[Query]] object.
-	 * @param Query $query the [[Query]] object from which the SQL statement will be generated
+	 * Generates query from a [[Query]] object.
+	 * @param Query $query the [[Query]] object from which the query will be generated
 	 * @return array the generated SQL statement (the first array element) and the corresponding
 	 * parameters to be bound to the SQL statement (the second array element).
 	 */
 	public function build($query)
 	{
-		$searchQuery = array();
-		$this->buildFields($searchQuery, $query->fields);
-//		$this->buildFrom($searchQuery, $query->from);
-		$this->buildCondition($searchQuery, $query->where);
-		$this->buildOrderBy($searchQuery, $query->orderBy);
-		$this->buildLimit($searchQuery, $query->limit, $query->offset);
-
-		return $searchQuery;
-	}
+		$parts = [];
 
-	/**
-	 * Converts an abstract column type into a physical column type.
-	 * The conversion is done using the type map specified in [[typeMap]].
-	 * The following abstract column types are supported (using MySQL as an example to explain the corresponding
-	 * physical types):
-	 *
-	 * - `pk`: an auto-incremental primary key type, will be converted into "int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY"
-	 * - `bigpk`: an auto-incremental primary key type, will be converted into "bigint(20) NOT NULL AUTO_INCREMENT PRIMARY KEY"
-	 * - `string`: string type, will be converted into "varchar(255)"
-	 * - `text`: a long string type, will be converted into "text"
-	 * - `smallint`: a small integer type, will be converted into "smallint(6)"
-	 * - `integer`: integer type, will be converted into "int(11)"
-	 * - `bigint`: a big integer type, will be converted into "bigint(20)"
-	 * - `boolean`: boolean type, will be converted into "tinyint(1)"
-	 * - `float``: float number type, will be converted into "float"
-	 * - `decimal`: decimal number type, will be converted into "decimal"
-	 * - `datetime`: datetime type, will be converted into "datetime"
-	 * - `timestamp`: timestamp type, will be converted into "timestamp"
-	 * - `time`: time type, will be converted into "time"
-	 * - `date`: date type, will be converted into "date"
-	 * - `money`: money type, will be converted into "decimal(19,4)"
-	 * - `binary`: binary data type, will be converted into "blob"
-	 *
-	 * If the abstract type contains two or more parts separated by spaces (e.g. "string NOT NULL"), then only
-	 * the first part will be converted, and the rest of the parts will be appended to the converted result.
-	 * For example, 'string NOT NULL' is converted to 'varchar(255) NOT NULL'.
-	 *
-	 * For some of the abstract types you can also specify a length or precision constraint
-	 * by prepending it in round brackets directly to the type.
-	 * For example `string(32)` will be converted into "varchar(32)" on a MySQL database.
-	 * If the underlying DBMS does not support these kind of constraints for a type it will
-	 * be ignored.
-	 *
-	 * If a type cannot be found in [[typeMap]], it will be returned without any change.
-	 * @param string $type abstract column type
-	 * @return string physical column type.
-	 */
-	public function getColumnType($type)
-	{
-		if (isset($this->typeMap[$type])) {
-			return $this->typeMap[$type];
-		} elseif (preg_match('/^(\w+)\((.+?)\)(.*)$/', $type, $matches)) {
-			if (isset($this->typeMap[$matches[1]])) {
-				return preg_replace('/\(.+\)/', '(' . $matches[2] . ')', $this->typeMap[$matches[1]]) . $matches[3];
-			}
-		} elseif (preg_match('/^(\w+)\s+/', $type, $matches)) {
-			if (isset($this->typeMap[$matches[1]])) {
-				return preg_replace('/^\w+/', $this->typeMap[$matches[1]], $type);
-			}
+		if ($query->fields !== null) {
+			$parts['fields'] = (array) $query->fields;
 		}
-		return $type;
-	}
-
-	/**
-	 * @param array $columns
-	 * @param boolean $distinct
-	 * @param string $selectOption
-	 * @return string the SELECT clause built from [[query]].
-	 */
-	public function buildFields(&$query, $columns)
-	{
-		if ($columns === null) {
-			return;
+		if ($query->limit !== null && $query->limit >= 0) {
+			$parts['size'] = $query->limit;
 		}
-		foreach ($columns as $i => $column) {
-			if (is_object($column)) {
-				$columns[$i] = (string)$column;
-			}
+		if ($query->offset > 0) {
+			$parts['from'] = (int) $query->offset;
+		}
+
+		$this->buildCondition($parts, $query->where);
+		$this->buildOrderBy($parts, $query->orderBy);
+
+		if (empty($parts['query'])) {
+			$parts['query'] = ["match_all" => (object)[]];
 		}
-		$query['fields'] = $columns;
+
+		return [
+			'queryParts' => $parts,
+			'index' => $query->index,
+			'type' => $query->type,
+			'options' => [
+				'timeout' => $query->timeout
+			],
+		];
 	}
 
 	/**
-	 * @param array $columns
-	 * @return string the ORDER BY clause built from [[query]].
+	 * adds order by condition to the query
 	 */
 	public function buildOrderBy(&$query, $columns)
 	{
@@ -143,28 +88,13 @@ class QueryBuilder extends \yii\base\Object
 			} elseif (is_string($direction)) {
 				$orders[] = $direction;
 			} else {
-				$orders[] = array($name => ($direction === Query::SORT_DESC ? 'desc' : 'asc'));
+				$orders[] = array($name => ($direction === SORT_DESC ? 'desc' : 'asc'));
 			}
 		}
 		$query['sort'] = $orders;
 	}
 
 	/**
-	 * @param integer $limit
-	 * @param integer $offset
-	 * @return string the LIMIT and OFFSET clauses built from [[query]].
-	 */
-	public function buildLimit(&$query, $limit, $offset)
-	{
-		if ($limit !== null && $limit >= 0) {
-			$query['size'] = $limit;
-		}
-		if ($offset > 0) {
-			$query['from'] = (int) $offset;
-		}
-	}
-
-	/**
 	 * Parses the condition specification and generates the corresponding SQL expression.
 	 * @param string|array $condition the condition specification. Please refer to [[Query::where()]]
 	 * on how to specify a condition.
@@ -191,7 +121,7 @@ class QueryBuilder extends \yii\base\Object
 			return;
 		}
 		if (!is_array($condition)) {
-			throw new NotSupportedException('String conditions are not supported by elasticsearch.');
+			throw new NotSupportedException('String conditions in where() are not supported by elasticsearch.');
 		}
 		if (isset($condition[0])) { // operator format: operator, operand 1, operand 2, ...
 			$operator = strtoupper($condition[0]);
@@ -200,7 +130,7 @@ class QueryBuilder extends \yii\base\Object
 				array_shift($condition);
 				$this->$method($query, $operator, $condition);
 			} else {
-				throw new Exception('Found unknown operator in query: ' . $operator);
+				throw new InvalidParamException('Found unknown operator in query: ' . $operator);
 			}
 		} else { // hash format: 'column1' => 'value1', 'column2' => 'value2', ...
 			$this->buildHashCondition($query, $condition);

tests/unit/framework/elasticsearch/ActiveRecordTest.php

@@ -296,17 +296,22 @@ class ActiveRecordTest extends ElasticSearchTestCase
 		$this->assertEquals(1, count(Customer::find()->where(array('AND', array('name' => array('user2','user3')), array('BETWEEN', 'status', 2, 4)))->all()));
 	}
 
-//	public function testSum()
-//	{
-//		$this->assertEquals(6, OrderItem::find()->count());
-//		$this->assertEquals(7, OrderItem::find()->sum('quantity'));
-//	}
+	public function testFindNullValues()
+	{
+		$customer = Customer::find(2);
+		$customer->name = null;
+		$customer->save(false);
 
-//	public function testFindColumn()
-//	{
-//		$this->assertEquals(array('user1', 'user2', 'user3'), Customer::find()->column('name'));
-////		TODO $this->assertEquals(array('user3', 'user2', 'user1'), Customer::find()->orderBy(array('name' => Query::SORT_DESC))->column('name'));
-//	}
+		$result = Customer::find()->where(['name' => null])->all();
+		$this->assertEquals(1, count($result));
+		$this->assertEquals(2, reset($result)->primaryKey);
+	}
+
+	public function testFindColumn()
+	{
+		$this->assertEquals(array('user1', 'user2', 'user3'), Customer::find()->column('name'));
+		$this->assertEquals(array('user3', 'user2', 'user1'), Customer::find()->orderBy(array('name' => SORT_DESC))->column('name'));
+	}
 
 	public function testExists()
 	{

tests/unit/framework/elasticsearch/ElasticSearchConnectionTest.php

@@ -16,51 +16,4 @@ class ElasticSearchConnectionTest extends ElasticSearchTestCase
 		$db->open();
 	}
 
-	/**
-	 * test connection to redis and selection of db
-	 */
-	public function testConnect()
-	{
-		$db = new Connection();
-		$db->dsn = 'redis://localhost:6379';
-		$db->open();
-		$this->assertTrue($db->ping());
-		$db->set('YIITESTKEY', 'YIITESTVALUE');
-		$db->close();
-
-		$db = new Connection();
-		$db->dsn = 'redis://localhost:6379/0';
-		$db->open();
-		$this->assertEquals('YIITESTVALUE', $db->get('YIITESTKEY'));
-		$db->close();
-
-		$db = new Connection();
-		$db->dsn = 'redis://localhost:6379/1';
-		$db->open();
-		$this->assertNull($db->get('YIITESTKEY'));
-		$db->close();
-	}
-
-	public function keyValueData()
-	{
-		return array(
-			array(123),
-			array(-123),
-			array(0),
-			array('test'),
-			array("test\r\ntest"),
-			array(''),
-		);
-	}
-
-	/**
-	 * @dataProvider keyValueData
-	 */
-	public function testStoreGet($data)
-	{
-		$db = $this->getConnection(true);
-
-		$db->set('hi', $data);
-		$this->assertEquals($data, $db->get('hi'));
-	}
 }
\ No newline at end of file

tests/unit/framework/elasticsearch/QueryTest.php

+<?php
+
+namespace yiiunit\framework\elasticsearch;
+
+use yii\elasticsearch\Query;
+
+/**
+ * @group db
+ * @group mysql
+ */
+class QueryTest extends ElasticSearchTestCase
+{
+	protected function setUp()
+	{
+		parent::setUp();
+
+		$command = $this->getConnection()->createCommand();
+
+		$command->deleteAllIndexes();
+
+		$command->insert('test', 'user', ['name' => 'user1', 'email' => 'user1@example.com', 'status' => 1], 1);
+		$command->insert('test', 'user', ['name' => 'user2', 'email' => 'user2@example.com', 'status' => 1], 2);
+		$command->insert('test', 'user', ['name' => 'user3', 'email' => 'user3@example.com', 'status' => 2], 3);
+		$command->insert('test', 'user', ['name' => 'user4', 'email' => 'user4@example.com', 'status' => 1], 4);
+
+		$command->flushIndex();
+	}
+
+	public function testFields()
+	{
+		$query = new Query;
+		$query->from('test', 'user');
+
+		$query->fields(['name', 'status']);
+		$this->assertEquals(['name', 'status'], $query->fields);
+
+		$result = $query->one($this->getConnection());
+		$this->assertEquals(2, count($result['_source']));
+		$this->assertArrayHasKey('status', $result['_source']);
+		$this->assertArrayHasKey('name', $result['_source']);
+		$this->assertArrayHasKey('_id', $result);
+
+		$query->fields([]);
+		$this->assertEquals([], $query->fields);
+
+		$result = $query->one($this->getConnection());
+		$this->assertEquals([], $result['_source']);
+		$this->assertArrayHasKey('_id', $result);
+
+		$query->fields(null);
+		$this->assertNull($query->fields);
+
+		$result = $query->one($this->getConnection());
+		$this->assertEquals(3, count($result['_source']));
+		$this->assertArrayHasKey('status', $result['_source']);
+		$this->assertArrayHasKey('email', $result['_source']);
+		$this->assertArrayHasKey('name', $result['_source']);
+		$this->assertArrayHasKey('_id', $result);
+	}
+
+	public function testOne()
+	{
+		$query = new Query;
+		$query->from('test', 'user');
+
+		$result = $query->one($this->getConnection());
+		$this->assertEquals(3, count($result['_source']));
+		$this->assertArrayHasKey('status', $result['_source']);
+		$this->assertArrayHasKey('email', $result['_source']);
+		$this->assertArrayHasKey('name', $result['_source']);
+		$this->assertArrayHasKey('_id', $result);
+
+		$result = $query->where(['name' => 'user1'])->one($this->getConnection());
+		$this->assertEquals(3, count($result['_source']));
+		$this->assertArrayHasKey('status', $result['_source']);
+		$this->assertArrayHasKey('email', $result['_source']);
+		$this->assertArrayHasKey('name', $result['_source']);
+		$this->assertArrayHasKey('_id', $result);
+		$this->assertEquals(1, $result['_id']);
+
+		$result = $query->where(['name' => 'user5'])->one($this->getConnection());
+		$this->assertFalse($result);
+	}
+
+	public function testAll()
+	{
+		$query = new Query;
+		$query->from('test', 'user');
+
+		$results = $query->all($this->getConnection());
+		$this->assertEquals(4, count($results));
+		$result = reset($results);
+		$this->assertEquals(3, count($result['_source']));
+		$this->assertArrayHasKey('status', $result['_source']);
+		$this->assertArrayHasKey('email', $result['_source']);
+		$this->assertArrayHasKey('name', $result['_source']);
+		$this->assertArrayHasKey('_id', $result);
+
+		$query = new Query;
+		$query->from('test', 'user');
+
+		$results = $query->where(['name' => 'user1'])->all($this->getConnection());
+		$this->assertEquals(1, count($results));
+		$result = reset($results);
+		$this->assertEquals(3, count($result['_source']));
+		$this->assertArrayHasKey('status', $result['_source']);
+		$this->assertArrayHasKey('email', $result['_source']);
+		$this->assertArrayHasKey('name', $result['_source']);
+		$this->assertArrayHasKey('_id', $result);
+		$this->assertEquals(1, $result['_id']);
+
+		// indexBy
+		$query = new Query;
+		$query->from('test', 'user');
+
+		$results = $query->indexBy('name')->all($this->getConnection());
+		$this->assertEquals(4, count($results));
+		ksort($results);
+		$this->assertEquals(['user1', 'user2', 'user3', 'user4'], array_keys($results));
+	}
+
+	public function testScalar()
+	{
+		$query = new Query;
+		$query->from('test', 'user');
+
+		$result = $query->where(['name' => 'user1'])->scalar('name', $this->getConnection());
+		$this->assertEquals('user1', $result);
+		$result = $query->where(['name' => 'user1'])->scalar('noname', $this->getConnection());
+		$this->assertNull($result);
+		$result = $query->where(['name' => 'user5'])->scalar('name', $this->getConnection());
+		$this->assertNull($result);
+	}
+
+	public function testColumn()
+	{
+		$query = new Query;
+		$query->from('test', 'user');
+
+		$result = $query->orderBy(['name' => SORT_ASC])->column('name', $this->getConnection());
+		$this->assertEquals(['user1', 'user2', 'user3', 'user4'], $result);
+		$result = $query->column('noname', $this->getConnection());
+		$this->assertEquals([null, null, null, null], $result);
+		$result = $query->where(['name' => 'user5'])->scalar('name', $this->getConnection());
+		$this->assertNull($result);
+
+	}
+
+
+	public function testOrder()
+	{
+		$query = new Query;
+		$query->orderBy('team');
+		$this->assertEquals(['team' => SORT_ASC], $query->orderBy);
+
+		$query->addOrderBy('company');
+		$this->assertEquals(['team' => SORT_ASC, 'company' => SORT_ASC], $query->orderBy);
+
+		$query->addOrderBy('age');
+		$this->assertEquals(['team' => SORT_ASC, 'company' => SORT_ASC, 'age' => SORT_ASC], $query->orderBy);
+
+		$query->addOrderBy(['age' => SORT_DESC]);
+		$this->assertEquals(['team' => SORT_ASC, 'company' => SORT_ASC, 'age' => SORT_DESC], $query->orderBy);
+
+		$query->addOrderBy('age ASC, company DESC');
+		$this->assertEquals(['team' => SORT_ASC, 'company' => SORT_DESC, 'age' => SORT_ASC], $query->orderBy);
+	}
+
+	public function testLimitOffset()
+	{
+		$query = new Query;
+		$query->limit(10)->offset(5);
+		$this->assertEquals(10, $query->limit);
+		$this->assertEquals(5, $query->offset);
+	}
+
+	public function testUnion()
+	{
+	}
+}