New MigrationsPPT
IntroductionNewMigrations is a code-first approach to database migrations. It...
IntroductionNewMigrations is a code-first approach to database migrations. It allows you to make changes to your database schema by generating and running scripts based on your model. This approach removes the need for manual database updates or any other form of database-specific intervention.Benefits of New MigrationsNewMigrations provides a number of benefits:Code-First ApproachBy using a code-first approach, you can easily represent your database schema as C# classes. This allows for a more maintainable and understandable way to represent your database structureAutomated ScriptsNewMigrations generates scripts based on the changes you make to your model. These scripts are then used to update the database schema without any manual interventionEasy IntegrationNewMigrations integrates seamlessly with your existing development process. It can be used with any project type, whether it's a ASP.NET web application, console application, or any other .NET projectVersion ControlNewMigrations allows you to version control your database schema changes. Each migration can be tracked and managed separately, making it easy to rollback or deploy specific migrationsExtensibleNewMigrations is extensible, allowing you to customize the generated scripts or even add your own custom scripts. This gives you the flexibility to handle more advanced scenarios or integrate with other tools or frameworksHow It WorksNewMigrations follows a three-step process for database migrations:SnapshotThe first step is to create a snapshot of your current database schema. This snapshot represents the initial state of your database structureModel ChangesNext, you make changes to your model by adding, modifying, or deleting classes and properties. These changes are represented as deltas (diff) between the current snapshot and the desired new state of the modelGenerate ScriptsFinally, NewMigrations generates scripts based on the deltas obtained from step 2. These scripts are then used to update the database schema accordingly. The generated scripts are typically SQL scripts that modify the database structureAfter generating the scripts, you can run them against your database to apply the desired changes. NewMigrations provides a command-line tool or API for running the migrations.Key Components of New MigrationsNewMigrations consists of several key components that work together to achieve its functionality:ModelThe model represents your database structure as C# classes. Each class corresponds to a table in the database, and the properties of the class represent columns in the tableDeltasDeltas represent the changes made to the model. When you make changes to the model, NewMigrations generates deltas to capture the differences between the current and desired statesMigratorThe migrator is responsible for generating scripts based on the deltas obtained from the model changes. It uses a template-based approach to generate the scripts, allowing you to customize the templates if neededScript AnalyzerThe script analyzer adds additional checks and validations to ensure that the generated scripts will execute successfully against your database. It checks for potential conflicts or issues that might arise during executionRunnerThe runner is responsible for executing the generated scripts against your database. It provides a convenient API or command-line interface for running migrations. You can also integrate it with other build or deployment tools for automated deployment of migrations
