Run the following command rake db:migrate:down VERSION=<version> where <version> is the version number of your migration file you want to revert. eg. if you want to revert a migration with file name 3846656238_create_users.rb rake db:migrate:down VERSION=3846656238
The 2nd call to Enable-Migrations is failing because the Configuration.cs file already exists. If you rename that class and file, you should be able to run that 2nd Enable-Migrations, which will create another Configuration.cs. You will then need to specify which configuration you want to use when updating the databases. Update-Database -ConfigurationTypeName MyRenamedConfiguration
You can use this: Schema::table(‘despatch_discrepancies’, function (Blueprint $table) { $table->dropForeign([‘pick_detail_id’]); $table->dropColumn(‘pick_detail_id’); }); If you take a peak at dropForeign source, it will build the foreign key index name for you if you pass the column name as an array.
Room does NOT have a good Migration System, at least not until 2.1.0-alpha03. So, until we have better Migration System, there are some workarounds to have easy Migrations in the Room. As there is no such method as @Database(createNewTables = true) or MigrationSystem.createTable(User::class), which there should be one or other, the only possible way is … Read more
In Rails 4+ in order to remove not-null constraint, you can use change_column_null: change_column_null :users, :address, true
Since you are using a custom User model, you can do 4 steps: Comment out django.contrib.admin in your INSTALLED_APPS settings INSTALLED_APPS = [ … #’django.contrib.admin’, … ] Comment out admin path in urls.py urlpatterns = [ … #path(‘admin/’, admin.site.urls) … ] Then run python manage.py migrate When done, uncomment all back
Generating the “first migration” In your case, the most reliable way is to do it almost manually. I would suggest to use sequelize-cli tool. The syntax is rather plain: sequelize init … sequelize model:create –name User –attributes first_name:string,last_name:string,bio:text This will create both model AND migration. Then, manually merge your existing models with generated with sequelize-cli, … Read more
The reason of Access denied for user ‘homestead’@’localhost’ laravel 5 error is caching-issue of the .env.php file cause Laravel 5 is using environment based configuration in your .env file. 1. Go to your application root directory and open .env file (In ubuntu may be it’s hidden so press ctrl+h to show hidden files & if … Read more
Prior to Laravel 5, there was no Laravel native way of altering an existing table column using the schema builder. You’d need to use raw queries for this. However, as of Laravel 5 you can use: $table->string(‘foo’)->nullable(false)->change(); You must have the dbal dependency prior to running the above command: composer require doctrine/dbal
First, create a dump on server A. A$ redis-cli 127.0.0.1:6379> CONFIG GET dir 1) “dir” 2) “/var/lib/redis/” 127.0.0.1:6379> SAVE OK This ensures dump.rdb is completely up-to-date, and shows us where it is stored (/var/lib/redis/dump.rdb in this case). dump.rdb is also periodically written to disk automatically. Next, copy it to server B: A$ scp /var/lib/redis/dump.rdb myuser@B:/tmp/dump.rdb … Read more