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Fix enum migration for Postgres #327

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merged 3 commits into from
Jun 21, 2017
Merged

Fix enum migration for Postgres #327

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8d1d317
Fix postgres migration.
Jun 16, 2017
345bf08
Add driver name to thrown exception in migration.
Jun 17, 2017
c8b478f
Merge branch 'master' into master
djaiss Jun 21, 2017
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39 changes: 36 additions & 3 deletions database/migrations/2017_06_07_173437_add_multiple_genders_choices.php
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Original file line number Diff line number Diff line change
Expand Up @@ -13,8 +13,41 @@ class AddMultipleGendersChoices extends Migration
*/
public function up()
{
DB::statement("ALTER TABLE contacts CHANGE COLUMN gender gender ENUM('male', 'female', 'none')");
DB::statement("ALTER TABLE significant_others CHANGE COLUMN gender gender ENUM('male', 'female', 'none')");
DB::statement("ALTER TABLE kids CHANGE COLUMN gender gender ENUM('male', 'female', 'none')");
$driverName = DB::connection()->getPDO()->getAttribute(PDO::ATTR_DRIVER_NAME);
switch($driverName)
{
case 'mysql':
DB::statement("ALTER TABLE contacts CHANGE COLUMN gender gender ENUM('male', 'female', 'none')");
DB::statement("ALTER TABLE significant_others CHANGE COLUMN gender gender ENUM('male', 'female', 'none')");
DB::statement("ALTER TABLE kids CHANGE COLUMN gender gender ENUM('male', 'female', 'none')");
break;
case 'pgsql':
$this->alterEnum('contacts', 'gender', ['male', 'female', 'none']);
$this->alterEnum('significant_others', 'gender', ['male', 'female', 'none']);
$this->alterEnum('kids', 'gender', ['male', 'female', 'none']);
break;
default:
throw new \Exception("Driver {$driverName} not supported.");
break;
}
}

/**
* Alter an enum field constraints. Source: https://stackoverflow.com/a/36198549
* @param $table
* @param $field
* @param array $options
*/
protected function alterEnum($table, $field, array $options) {
$check = "${table}_${field}_check";
$enumList = [];
foreach($options as $option) {
$enumList[] = sprintf("'%s'::CHARACTER VARYING", $option);
}
$enumString = implode(", ", $enumList);
DB::transaction(function () use ($table, $field, $check, $options, $enumString) {
DB::statement(sprintf('ALTER TABLE %s DROP CONSTRAINT %s;', $table, $check));
DB::statement(sprintf('ALTER TABLE %s ADD CONSTRAINT %s CHECK (%s::TEXT = ANY (ARRAY[%s]::TEXT[]))', $table, $check, $field, $enumString));
});
}
}