在 Yii 中批量插入 [英] Batch insert in Yii

问题描述

我需要在 Yii 中插入多个 ActiveRecord 对象，如果它们都插入了

I need to insert multiple ActiveRecord object in Yii,if all of them inserted

$transaction = Yii::app()->db->beginTransaction();
for ($i = 0;$i < 10;$i++){
    $model = new Mymodel();
    $model->x = $i;
    if (!$model->save()){
        $transaction->rollback();
        break;
    }
}
if ($transaction->active)
    $transaction->commit();

现在我需要在一个查询中插入所有这些，在使用活动记录期间我该怎么做?

Now I need to insert all of them in one query,How can I do it during using active record?

推荐答案

虽然不完全像 Yii 那样，但它可以作为一个扩展/组件，并且被当作一个普通的命令来对待，所以事务仍然适用.完全可以将其设置为在查询中使用参数而不是字符串文字，并且还可以实现对空值和默认值的检查.

While not entirely Yii like, it can be made as an extension/component, and is treated like a normal command, so transactions still apply. It would be entirely possible to set this up to utilise parameters rather than string literals in the query, and could also implement checking of null and default values.

class CDbMultiInsertCommand extends CDbCommand{

/** @var CActiveRecord $class */
private $class;

/** @var string $insert_template */
private $insert_template = "insert into %s(%s) ";

/** @var string $value_template */
private $value_template = "(%s)";

/** @var string $query */
public $query;

/** @var CDbColumnSchema[] $columns */
private $columns;

/** @var boolean $fresh */
private $fresh;

/** @var CDbConnection $db */
private $db;

/** @param CActiveRecord $class
 *  @param CDbConnection $db
 */
public function __construct($class, $db = null){
  $this->class = $class;
  $this->createTemplate();
  if(is_null($db)){
    $this->db = Yii::app()->db;
  }
  else{
    $this->db = $db;
  }
}
private function createTemplate(){
  $this->fresh = true;
  $value_template = "";
  $columns_string = "";
  $this->columns = $this->class->getMetaData()->tableSchema->columns;
  $counter = 0;
  foreach($this->columns as $column){
    /** @var CDbColumnSchema $column */
    if($column->autoIncrement){
      $value_template .= "0";
    }
    else if($column->type == "integer" || $column->type == "boolean" || $column->type == "float" || $column->type == "double") {
      $value_template .= "%d";
    }
    else{
      $value_template .= ""%s"";
    }
    $columns_string .= $column->name;
    $counter ++;
    if($counter != sizeof($this->columns)){
      $columns_string .= ", ";
      $value_template .= ", ";
    }
  }

  $this->insert_template = sprintf($this->insert_template, $this->class->tableName(), $columns_string);
  $this->value_template = sprintf($this->value_template, $value_template);
}

/** @param boolean $validate
 *  @param CActiveRecord $record
 */
public function add($record, $validate = true){
  $values = array();
  if($validate){
    if(!$record->validate()){
      return false;
    }
  }
  $counter = 0;
  foreach($this->columns as $column){
    if($column->autoIncrement){
      continue;
    }
    $values[$counter] = $this->class->{$column->name};
    $counter ++;
  }
  if(!$this->fresh){
    $this->query .= ",";
  }
  else{
    $this->query = "values";
  }
  $this->fresh = false;
  $this->query .= vsprintf($this->value_template, $values);
  return true;
}

public function getConnection(){
  return $this->db;
}

public function execute(){
  $this->setText($this->insert_template." ".$this->query);
  return parent::execute();
}
}

用法是:

$transaction = Yii::app()->db->beginTransaction();
$multi = new CDbMultiInsertCommand(new Mymodel());
for ($i = 0;$i < 10;$i++){
    $model = new Mymodel();
    $model->x = $i;
    $multi->add($model, $shouldBeValidated);
}

$multi->execute();

if ($transaction->active)
    $transaction->commit();

当然可以做得更详细和扩展以允许更新等

Of course it could be made more elaborate and extended to allow for updates, etc

希望这会有所帮助.

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