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Add limit to random result

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This commit is contained in:
Dennis Eichhorn 2016-08-08 15:44:08 +02:00
parent 2b2808ef4e
commit 0351533b05
6 changed files with 18 additions and 9 deletions
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13
DataStorage/Database/DataMapperAbstract.php
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@ -994,21 +994,26 @@ class DataMapperAbstract implements DataMapperInterface
/** /**
* Get random object * Get random object
* *
* @param int $amount Amount of random models
* @param int $relations Relations type * @param int $relations Relations type
* *
* @return array * @return mixed
* *
* @since 1.0.0 * @since 1.0.0
* @author Dennis Eichhorn <d.eichhorn@oms.com> * @author Dennis Eichhorn <d.eichhorn@oms.com>
*/ */
public static function getRandom(int $relations = RelationType::ALL) public static function getRandom(int $amount = 1, int $relations = RelationType::ALL)
{ {
$query = new Builder(self::$db); $query = new Builder(self::$db);
$query->prefix(self::$db->getPrefix()) $query->prefix(self::$db->getPrefix())
->random(static::$primaryKey) ->random(static::$primaryKey)
->from(static::$table); ->from(static::$table)
->limit($amount);
return self::get(self::$db->con->prepare($query->toSql())->execute(), $relations); $sth = self::$db->con->prepare($query->toSql());
$sth->execute();
return self::get($sth->fetchAll(), $relations);
} }
/** /**

4
DataStorage/Database/Query/Grammar/MicrosoftGrammar.php
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@ -48,6 +48,8 @@ class MicrosoftGrammar extends Grammar
$expression = '*'; $expression = '*';
} }
return 'SELECT TOP 1 ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY IDX FETCH FIRST 1 ROWS ONLY'; $query->limit = $query->limit ?? 1;
return 'SELECT TOP 1 ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY IDX FETCH FIRST ' . $query->limit . ' ROWS ONLY';
} }
} }

2
DataStorage/Database/Query/Grammar/MysqlGrammar.php
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@ -57,6 +57,6 @@ class MysqlGrammar extends Grammar
$expression = '*'; $expression = '*';
} }
return 'SELECT ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY RAND() LIMIT 1'; return 'SELECT ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY RAND() ' . $this->compileLimit($query, $query->limit);
} }
} }

4
DataStorage/Database/Query/Grammar/OracleGrammar.php
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@ -48,6 +48,8 @@ class OracleGrammar extends Grammar
$expression = '*'; $expression = '*';
} }
return 'SELECT ' . $expression . ' FROM (SELECT ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY dbms_random.value) WHERE rownum = 1'; $query->limit = $query->limit ?? 1;
return 'SELECT ' . $expression . ' FROM (SELECT ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY dbms_random.value) WHERE rownum >= 1 AND rownum <= ' . $query->limit;
} }
} }

2
DataStorage/Database/Query/Grammar/PostgresGrammar.php
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@ -48,6 +48,6 @@ class PostgresGrammar extends Grammar
$expression = '*'; $expression = '*';
} }
return 'SELECT ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY RANDOM() LIMIT 1'; return 'SELECT ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY RANDOM() ' . $this->compileLimit($query, $query->limit);
} }
} }

2
DataStorage/Database/Query/Grammar/SQLiteGrammar.php
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@ -57,6 +57,6 @@ class SqliteGrammar extends Grammar
$expression = '*'; $expression = '*';
} }
return 'SELECT ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY RANDOM() LIMIT 1'; return 'SELECT ' . $expression . ' ' . $this->compileFrom($query, $query->from) . ' ORDER BY RANDOM() ' . $this->compileLimit($query, $query->limit);
} }
} }