Update multiple rows of database in Laravel

问题

I want a code for update multiple rows of database, somthing like this:

UPDATE values SET data='{"options":["male","female"],"default":"male"}' where project_id=1 and id=1;
UPDATE values SET data='{"options":["male","female"],"default":"male"}' where project_id=1 and id=2;
UPDATE values SET data='{"options":["male","female"],"default":"male"}' where project_id=1 and id=3;

After some hours i could get result with something like this in laravel framework:

$values = Value::where('project_id', $id)->get();
$sql = "";
foreach($request->fields as $field) {
  if(!empty($field->default)) { //New default value is set
    foreach($values as $value) {
      $data = json_decode($value->data, true); /**data column as json object in mysql database **/
      $data["default"] = $field->default;
      $data = json_encode($data);
      $sql .= "update ".DB::connection()->getDatabaseName().".values set data='".$data."' where id="."$value->id;";
    }
  }
}
DB::unprepared($sql);

but this code is not a good practice! So my question is

Is there any ORM way to do this better?!

回答1:

Here is an easy way to do it.

$values = Value::where('project_id', $id)->update(['data'=>$data]);

I found it from this link

Hope it helps.

回答2:

    $values = Value::where('project_id', $id)->get();
    $sql = "";
    foreach($request->fields as $field) {
      if(!empty($field->default)) { //New default value is set
        foreach($values as $value) {      
          $tmp=$value->data;
          $tmp->default = $field->default;
          $value->data = $tmp;
          $value->save();
        }
      }
    }

And in Value model use Mutator and Accessor, like this

public function getDataAttribute($value)
{
    return json_decode($value);
}
public function setDataAttribute($value)
{
    $this->attributes['data'] = json_encode($value);
}

See documentation http://laravel.com/docs/4.2/eloquent#accessors-and-mutators

Work - https://yadi.sk/i/BnC3HYozehoy2

来源：https://stackoverflow.com/questions/28539400/update-multiple-rows-of-database-in-laravel