Laravel change String Boolean value to Int Boolean in migration - php

Question

I'm working with a Laravel project that has two existing columns that are set to strings and hold a visually pleasing Boolean value of true or false.
I'm trying to change these columns from string to boolean in a Laravel migration, but need to convert the existing values in the columns, for instance, if the column value for a record has the value of false, it needs to become 0.
My current migration to modify these columns doesn't seem to acheive this automatically, how can I achieve this?
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class AddColumnsToNotificationContactsTable extends Migration
{
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::table('notification_contacts', function (Blueprint $table) {
$table->boolean('canNotify')->change();
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::table('notification_contacts', function (Blueprint $table) {
//
});
}
}
I get:
SQLSTATE[HY000]: General error: 1366 Incorrect integer value: 'false' for column 'canNotify' at row 1 (SQL: ALTER TABLE notification_contacts CHANGE canNotify canNotify TINYINT(1) NOT NULL)

Answer 1

Do it in multiple steps instead of running it in a single operation.
Steps are:
Add a new temp Column canNotifyTemp
Populate it with the old data from Column canNotify
Delete the old column
Rename the temp column
class UpdateClientsTableAddRedesignColumns extends Migration
{
public function up()
{
// step 1
Schema::table('notification_contacts', function(Blueprint $table) {
$table->boolean('canNotifyTemp')->default(0);
});
// step 2
DB::table('notification_contacts')
->where('canNotify', 'true')
->update(["canNotifyTemp" => true]);
DB::table('notification_contacts')
->where('canNotify', 'false')
->update(["canNotifyTemp" => false]);
// step 3
Schema::table('notification_contacts', function(Blueprint $table) {
$table->dropColumn('canNotify');
});
// step 4
Schema::table('notification_contacts', function(Blueprint $table) {
$table->renameColumn('canNotifyTemp', 'canNotify');
});
}
public function down()
{
// step 4 rollback
Schema::table('notification_contacts', function (Blueprint $table) {
$table->renameColumn('canNotify', 'canNotifyTemp');
});
// step 3 rollback
Schema::table('notification_contacts', function (Blueprint $table) {
$table->string('canNotify')->default('false');
});
// step 2 rollback
DB::table('notification_contacts')
->where('canNotifyTemp', true)
->update(["canNotify" => 'true']);
DB::table('notification_contacts')
->where('canNotifyTemp', false)
->update(["canNotify" => 'false']);
// step 1 rollback
Schema::table('notification_contacts', function (Blueprint $table) {
$table->dropColumn('canNotifyTemp');
});
}
}
Note: I did not run the migration so if there is any problem, tell me.