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yii2
Commit 679da533 by Carsten Brandt
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polished Query API

parent c6347d6d
Showing with 123 additions and 78 deletions
framework/yii/db/Query.php
......@@ -42,7 +42,7 @@ class Query extends Component implements QueryInterface
/**
* @var array the columns being selected. For example, `['id', 'name']`.
* This is used to construct the SELECT clause in a SQL statement. If not set, if means selecting all columns.
* This is used to construct the SELECT clause in a SQL statement. If not set, it means selecting all columns.
* @see select()
*/
public $select;
......
framework/yii/elasticsearch/ActiveQuery.php
......@@ -85,7 +85,7 @@ class ActiveQuery extends Query implements ActiveQueryInterface
{
$command = $this->createCommand($db);
$result = $command->queryAll();
if ($result['total'] == 0) {
if (empty($result['hits'])) {
return [];
}
$models = $this->createModels($result['hits']);
......@@ -111,19 +111,16 @@ class ActiveQuery extends Query implements ActiveQueryInterface
*/
public function one($db = null)
{
$command = $this->createCommand($db);
$result = $command->queryOne();
if ($result['total'] == 0 || empty($result['hits'])) {
if (($result = parent::one($db)) === false) {
return null;
}
if ($this->asArray) {
$first = reset($result['hits']);
$model = $first['_source'];
$model['primaryKey'] = $first['_id'];
$model = $result['_source'];
$model['primaryKey'] = $result['_id'];
} else {
/** @var ActiveRecord $class */
$class = $this->modelClass;
$model = $class::create(reset($result['hits']));
$model = $class::create($result);
}
if (!empty($this->with)) {
$models = [$model];
......@@ -132,24 +129,4 @@ class ActiveQuery extends Query implements ActiveQueryInterface
}
return $model;
}
/**
* Returns the query result as a scalar value.
* The value returned will be the specified attribute in the first record of the query results.
* @param string $attribute name of the attribute to select
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `db` application component will be used.
* @return string the value of the specified attribute in the first record of the query result.
* Null is returned if the query result is empty.
*/
public function scalar($attribute, $db = null)
{
$record = $this->one($db);
if ($record !== null) {
return $record->$attribute;
} else {
return null;
}
}
}
framework/yii/elasticsearch/ActiveRecord.php
......@@ -64,7 +64,6 @@ class ActiveRecord extends \yii\db\ActiveRecord
* @param mixed $primaryKey the primaryKey value
* @param array $options options given in this parameter are passed to elasticsearch
* as request URI parameters.
*
* Please refer to the [elasticsearch documentation](http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-get.html)
* for more details on these options.
* @return static|null The record instance or null if it was not found.
......
framework/yii/elasticsearch/Command.php
......@@ -59,12 +59,6 @@ class Command extends Component
return Json::decode($response->getBody(true))['hits'];
}
public function queryOne($options = [])
{
$options['size'] = 1;
return $this->queryAll($options);
}
public function queryCount($options = [])
{
$options['search_type'] = 'count';
......
framework/yii/elasticsearch/Query.php
......@@ -23,19 +23,36 @@ class Query extends Component implements QueryInterface
use QueryTrait;
/**
* @var array the columns being selected. For example, `array('id', 'name')`.
* This is used to construct the SELECT clause in a SQL statement. If not set, if means selecting all columns.
* @see select()
* @var array the fields being retrieved from the documents. For example, `['id', 'name']`.
* If not set, it means retrieving all fields. An empty array will result in no fields being
* retrieved. This means that only the primaryKey of a record will be available in the result.
* @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-fields.html#search-request-fields
* @see fields()
*/
public $fields;
/**
* @var string|array The index to retrieve data from. This can be a string representing a single index
* or a an array of multiple indexes. If this is not set, indexes are being queried.
* @see from()
*/
public $select; // TODO fields
public $index;
/**
* @var string|array The type to retrieve data from. This can be a string representing a single type
* or a an array of multiple types. If this is not set, all types are being queried.
* @see from()
*/
public $type;
/**
* @var integer A search timeout, bounding the search request to be executed within the specified time value
* and bail with the hits accumulated up to that point when expired. Defaults to no timeout.
* @see timeout()
* @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-body.html#_parameters_3
*/
public $timeout;
/**
* Creates a DB command that can be used to execute this query.
* @param Connection $db the database connection used to generate the SQL statement.
* @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 Command the created DB command instance.
*/
......@@ -51,23 +68,29 @@ class Query extends Component implements QueryInterface
/**
* Executes the query and returns all results as an array.
* @param Connection $db the database connection used to generate the SQL statement.
* If this parameter is not given, the `db` application component will be used.
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return array the query results. If the query results in nothing, an empty array will be returned.
*/
public function all($db = null)
{
$rows = $this->createCommand($db)->queryAll();
if ($this->indexBy === null) {
$rows = $this->createCommand($db)->queryAll()['hits'];
if ($this->indexBy === null && $this->fields === null) {
return $rows;
}
$result = [];
foreach ($rows as $row) {
foreach ($rows as $key => $row) {
if ($this->fields !== null) {
$row['_source'] = isset($row['fields']) ? $row['fields'] : [];
unset($row['fields']);
}
if ($this->indexBy !== null) {
if (is_string($this->indexBy)) {
$key = $row[$this->indexBy];
$key = $row['_source'][$this->indexBy];
} else {
$key = call_user_func($this->indexBy, $row);
}
}
$result[$key] = $row;
}
return $result;
......@@ -75,30 +98,40 @@ class Query extends Component implements QueryInterface
/**
* Executes the query and returns a single row of result.
* @param Connection $db the database connection used to generate the SQL statement.
* If this parameter is not given, the `db` application component will be used.
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return array|boolean the first row (in terms of an array) of the query result. False is returned if the query
* results in nothing.
*/
public function one($db = null)
{
return $this->createCommand($db)->queryOne();
$options['size'] = 1;
$result = $this->createCommand($db)->queryAll($options);
if (empty($result['hits'])) {
return false;
}
$record = reset($result['hits']);
if ($this->fields !== null) {
$record['_source'] = isset($record['fields']) ? $record['fields'] : [];
unset($record['fields']);
}
return $record;
}
/**
* Returns the query result as a scalar value.
* The value returned will be the specified attribute in the first record of the query results.
* @param string $attribute name of the attribute to select
* 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
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `db` application component will be used.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return string the value of the specified attribute in the first record of the query result.
* Null is returned if the query result is empty.
* Null is returned if the query result is empty or the field does not exist.
*/
public function scalar($attribute, $db = null)
public function scalar($field, $db = null)
{
$record = $this->one($db);
if ($record !== null) {
return $record->$attribute;
$record = self::one($db);
if ($record !== false && isset($record['_source'][$field])) {
return $record['_source'][$field];
} else {
return null;
}
......@@ -106,20 +139,27 @@ class Query extends Component implements QueryInterface
/**
* Executes the query and returns the first column of the result.
* @param Connection $db the database connection used to generate the SQL statement.
* If this parameter is not given, the `db` application component will be used.
* @param string $field the field to query over
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return array the first column of the query result. An empty array is returned if the query results in nothing.
*/
public function column($db = null)
public function column($field, $db = null)
{
return $this->createCommand($db)->queryColumn();
$query = clone $this;
$rows = $query->fields([$field])->createCommand($db)->queryAll()['hits'];
$result = [];
foreach ($rows as $row) {
$result[] = $row['fields'][$field];
}
return $result;
}
/**
* Returns the number of records.
* @param string $q the COUNT expression. This parameter is ignored by this implementation.
* @param Connection $db the database connection used to generate the SQL statement.
* If this parameter is not given (or null), the `db` application component will be used.
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return integer number of records
*/
public function count($q = '*', $db = null)
......@@ -138,8 +178,8 @@ class Query extends Component implements QueryInterface
* 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.
* @param Connection $db the database connection used to generate the SQL statement.
* If this parameter is not given, the `db` application component will be used.
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return integer the sum of the specified column values
*/
public function sum($q, $db = null)
......@@ -152,8 +192,8 @@ class Query extends Component implements QueryInterface
* 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 generate the SQL statement.
* If this parameter is not given, the `db` application component will be used.
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return integer the average of the specified column values.
*/
public function average($q, $db = null)
......@@ -166,8 +206,8 @@ class Query extends Component implements QueryInterface
* 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 generate the SQL statement.
* If this parameter is not given, the `db` application component will be used.
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return integer the minimum of the specified column values.
*/
public function min($q, $db = null)
......@@ -180,8 +220,8 @@ class Query extends Component implements QueryInterface
* 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 generate the SQL statement.
* If this parameter is not given, the `db` application component will be used.
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return integer the maximum of the specified column values.
*/
public function max($q, $db = null)
......@@ -193,7 +233,7 @@ class Query extends Component implements QueryInterface
/**
* Returns a value indicating whether the query result contains any row of data.
* @param Connection $db the database connection used to execute the query.
* If this parameter is not given, the `db` application component will be used.
* If this parameter is not given, the `elasticsearch` application component will be used.
* @return boolean whether the query result contains any row of data.
*/
public function exists($db = null)
......@@ -213,9 +253,43 @@ class Query extends Component implements QueryInterface
// TODO http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/docs-delete-by-query.html
}
/**
* Sets the index and type to retrieve documents from.
* @param string|array $index The index to retrieve data from. This can be a string representing a single index
* or a an array of multiple indexes. If this is `null` it means that all indexes are being queried.
* @param string|array $type The type to retrieve data from. This can be a string representing a single type
* or a an array of multiple types. If this is `null` it means that all types are being queried.
* @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-search.html#search-multi-index-type
*/
public function from($index, $type = null)
{
$this->index = $index;
$this->type = $type;
}
/**
* Sets the fields to retrieve from the documents.
* @param array $fields the fields to be selected.
* @return static the query object itself
* @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-fields.html
*/
public function fields($fields)
{
$this->fields = $fields;
return $this;
}
/**
* Sets the search timeout.
* @param integer $timeout A search timeout, bounding the search request to be executed within the specified time value
* and bail with the hits accumulated up to that point when expired. Defaults to no timeout.
* @return static the query object itself
* @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-body.html#_parameters_3
*/
public function timeout($timeout)
{
$this->timeout = $timeout;
return $this;
}
}
\ No newline at end of file
framework/yii/elasticsearch/QueryBuilder.php
......@@ -45,7 +45,7 @@ class QueryBuilder extends \yii\base\Object
public function build($query)
{
$searchQuery = array();
$this->buildSelect($searchQuery, $query->select);
$this->buildFields($searchQuery, $query->fields);
// $this->buildFrom($searchQuery, $query->from);
$this->buildCondition($searchQuery, $query->where);
$this->buildOrderBy($searchQuery, $query->orderBy);
......@@ -113,9 +113,9 @@ class QueryBuilder extends \yii\base\Object
* @param string $selectOption
* @return string the SELECT clause built from [[query]].
*/
public function buildSelect(&$query, $columns)
public function buildFields(&$query, $columns)
{
if (empty($columns)) {
if ($columns === null) {
return;
}
foreach ($columns as $i => $column) {
......
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