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Upgrade to 1.2

Serverpod 1.2. is backward compatible with Serverpod 1.0 and Serverpod 1.1. There are a few changes to the database layer, meaning you probably want to use the new methods. The old methods still works, but have been deprecated and will be permanently removed with the upcoming version 2.

Database migrations are new in Serverpod 1.2. You can still opt to manage your database manually, but it is recommended that you move to the new migration system. Using the new migration will make keeping your database up-to-date much easier.

Updating your CLI​

To update you Serverpod command line interface to the latest version, run:

dart pub global activate serverpod_cli

You can verify that you have the latest version installed by running:

serverpod version

Updating your pubspecs​

To move to Serverpod 1.2, you will need to update the pubspec.yaml files of your server, client, and flutter directories. Anywhere serverpod is mentioned, change the version to 1.2.0 (or any later version of Serverpod 1.2). It is recommended to use explicit versions of the Serverpod packages, to make sure that they are all compatible.

Update to Dart 3​

This update has bumped the minimum required dart version to 3.0.0. You will have to change the Dart SDK version in all your pubspec.yaml files.

Old pubspec.yaml configuration:

...
environment:
  sdk: '>=2.19.0 <4.0.0'

Updated pubspec.yaml configuration:

...
environment:
  sdk: '>=3.0.0 <4.0.0'

The Dockerfile in your project should be updated with the new Dart version:

FROM dart:3.0 AS build

...

After updating your pubspec.yaml files, make sure to run dart pub update on all your packages. You must also run serverpod generate in your server directory.

Deprecated methods​

In this version, we have completely reworked the database layer of Serverpod. The new methods have been placed under a static db field on the generated models. The old methods are still available, but the deprecation warnings will guide you toward moving to the updated API.

important

A few of the methods work slightly differently in their new versions. Most notably, the insertRow method will not modify the model you pass to it. Instead, it will return a modified copy with the inserted row id.

// The new find method is a drop-in replacement.
Example.find(...); // old
Example.db.find(...); // new

// The old findSingleRow method has changed name to findFirstRow but is otherwise a drop-in replacement.
Example.findSingleRow(...);
Example.db.findFirstRow(...);

// The new findById method is a drop-in replacement.
Example.findById(...); // old
Example.db.findById(...); // new

// The old delete method has been renamed to deleteWhere and now returns a list of ids of rows that was deleted.
Example.delete(...);
Example.db.deleteWhere(...);

// The new findById method is a drop-in replacement but returns the id of the row deleted.
Example.deleteRow(...); // old
Example.db.deleteRow(...); // new

// The old update method has been renamed too updateRow and now returns the entire updated object as a new copy.
Example.update(...);
Example.db.updateRow(...);

// The old insert method has been renamed too insertRow. The object you pass in is no longer modified, instead a new copy with the added row is returned which contains the inserted id. This means no mutations of the input object.
Example.insert(...);
Example.db.insertRow(...);

// The new count method is a drop-in replacement.
Example.count(...);
Example.db.count(...);

Model changes​

We have made some improvements to the Serverpod model files (previously referred to as protocol files or serializable entities). By default, the model files are now located in the lib/src/models/ directory, although using lib/src/protocol still works.

When making the improvements to the model files, we made additions and changes to the syntax. All old keywords still work, but serverpod generate will give deprecation warnings, guiding you toward updating your models. The changes are listed below.

The keyword api has been deprecated and replaced with the new keyword !persist as a drop-in replacement.

Old syntax:

class: Example
table: example
fields:
  name: String
  apiField: String, api

New syntax:

class: Example
table: example
fields:
  name: String
  apiField: String, !persist

The keyword database has been deprecated and replaced with the new keyword scope with the value serverOnly as a drop-in replacement.

Old syntax:

class: Example
table: example
fields:
  name: String
  serverField: String, database

New syntax:

class: Example
table: example
fields:
  name: String
  serverField: String, scope=serverOnly

The keyword parent has been moved and should be placed inside the new relation keyword, see the section on relations for the full new feature set.

Old syntax:

class: Example
table: example
fields:
  name: String
  parentId: int, parent=example

New Syntax:

class: Example
table: example
fields:
  name: String
  parentId: int, relation(parent=example)

Moved and renamed SQL file​

Serverpod has moved and renamed the generated SQL file for the complete database schema. Instead of the file generated/tables.pgsql, Serverpod now includes it as a part of each migration located in the migrations directory, under the name definition.sql.

Initialize the migration system​

If your project was created before migrations were introduced in Serverpod, you need to run a one-time setup to make it compatible with the new migration system. There are two guides to help you upgrade: one for projects that don't need to preserve any data and another for those that do.

The guides assume that you have already installed Serverpod 1.2 and that you have a project created with an earlier version of Serverpod.

No data to preserve​

If it is not important to preserve the data that is in your database, you can simply remove the database and let the migration system create a new one.

  1. Generate the project.

    This ensures that the project is up to date with the latest version of Serverpod. Navigate to your project's server package directory and run the generate command.

    $ serverpod generate

  2. Create a migration for your project.

    The migration system will create a migration as if the database needs to be initialized from scratch. Navigate to your project's server package directory and run the create-migration command.

    $ serverpod create-migration

  3. Recreate database.

    In a Serverpod development project, the database is hosted in a docker container. To remove the existing database and start a new one run the following commands:

    $ docker-compose down -v
    $ docker-compose up --build --detach

    The command first removes the running container along with its volume and the second command starts a new database from scratch.

  4. Initialize database from migration.

    Initialize the database by applying the migration to it using the --apply-migrations flag when starting the server.

    $ dart run bin/main.dart --apply-migrations

Data to preserve​

If your project already has data in the database that should be preserved, we can use the repair migration system to bring the project up to date with the migration system.

  1. Generate the project.

    This ensures that the project is up to date with the latest version of Serverpod. Navigate to your project's server package directory and run the generate command.

    $ serverpod generate

  2. Create a migration for your project.

    The migration system will create a migration as if the database needs to be initialized from scratch. Navigate to your project's server package directory and run the create-migration command.

    $ serverpod create-migration

  3. Create a repair migration.

    The repair migration system will create a repair migration that makes your live database schema match the newly created migration. To enable the command to fetch your live database schema it requires a running server. Navigate to your project's server package directory and start the server, then run the create-repair-migration command.

    $ dart run bin/main.dart
    $ serverpod create-repair-migration
    info

    When starting the server, warnings will be displayed about the database schema not matching the target database schema. These warnings are expected and can safely be ignored when creating the repair migration.

    Use the --mode option to specify the database source to use. By default, the repair migration system connects to your development database using the information specified in your Serverpod config.

  4. Apply the repair migration to your database.

    To apply the repair migration to your database, restart the server using the --apply-repair-migration flag.

    $ dart run bin/main.dart --apply-repair-migration

Closing remarks​

Your project is now compatible with the database migration system in Serverpod 1.2.

Happy coding!