kotlin-exposed-patterns

Topics in the source

• Kotlin Exposed Patterns
• When to Use
• How It Works
• Examples
• DSL Query
• DAO Entity Usage
• HikariCP Configuration
• Database Setup

Comprehensive patterns for database access with JetBrains Exposed ORM, including DSL queries, DAO, transactions, and production-ready configuration. Setting up database access with Exposed Writing SQL queries using Exposed DSL or DAO Configuring connection pooling with HikariCP Creating database migrations with Flyway Implementing the repository pattern with Exposed Handling JSON columns and complex queries Exposed provides two query styles: DSL for direct SQL-like expressions and DAO for entity lifecycle management. HikariCP manages a pool of reusable database connections configured via HikariConfig. Flyway runs versioned SQL migration scripts at startup to keep the schema in sync. All database operations run inside newSuspendedTransaction blocks for coroutine safety and atomicity. The repository pattern wraps Exposed queries behind an interface so business logic stays decoupled from the data layer and tests can use an in-memory H2 database. | Pattern | Description | |---------|-------------| | object Table : UUIDTable("name") | Define table with UUID primary key | | newSuspendedTransaction { } | Coroutine-safe transaction block | | Table.selectAll().where { } | Query with conditi

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