// 创建一个User对象 val user = User(id = 1, name = "Kronos", email = "kronos@kotlinorm.com" ) Code First模式下支持由数据类模型同步结构到数据库,同时也提供Database First模式下的代码生成器: // 如果表不存在则创建表,否则同步表结构,包括表列、索引、备注等 dataSou
dataBase的扩展方法,只需要拿到database 就可以拿到表对象进行db操作。 可以参考下面的代码。 valdatabase=Database.connect("jdbc:mysql://localhost:3306/antmgr?user=root&password=123456")//新增database.systemMenus.insert{set(it.Name,"test")set(it.IsActive,false) }//查询valsystemMenu=database.system...
This is a database Object Relational Model (ORM) library for Kotlin. This ORM heavily uses delegates to provide you a simple way to declare, synchronize, and use tables and their column/property values. The models you write can be used for more than one database and no database specific ...
@Database(version = 1, entities = [User::class])abstract class AppDatabase : RoomDatabase() {abstract fun userDao(): UserDaocompanion object {private var instance: AppDatabase? = null@Synchronizedfun getDatabase(context: Context): AppDatabase {instance?.let {return it}return Room.databas...
valquery=database.from(Employees).select().where{Employees.id%2eq1} 生成SQL: select*fromt_employeewhere(t_employee.id%?)=? 通过infix 定义自己的运算符 通过运算符重载,Ktorm 能够将 Kotlin 中四则运算符翻译为 SQL 中的相应符号。但是 Kotlin 的运算符重载还有许多的限制,比如: ...
val appDatabase = Room.databaseBuilder(applicationContext, AppDatabase::class.java, "app-db").build() 现在,你可以在任何需要登录功能的地方使用数据库进行登录验证。例如,在登录页面的逻辑中,可以使用以下代码来验证用户输入的用户名和密码是否正确: ...
Configure database connections using an in-memory database. Define database tables using Exposed’s DSL. Perform basic CRUD (Create, Read, Update, and Delete) operations on the database. Prerequisites Before starting this tutorial, ensure that you have the following installed on your machine:...
这里的DBSample是APT/KSP为配置了@WCDBTableCoding注解的ORM类生成的对应的DB工具类,写好ORM类之后,编译一下就可以生成。 操作数据 基本的增删查改同样是One line of code 插入操作 //Java//Prepare dataSamplesample=newSample();sample.id=1;sample.content="sample_insert";//Insertdatabase.insertObject(sample...
Access Object (DAO) APIof Exposed provides an object-oriented approach for interacting with a database, similar to traditional Object-Relational Mapping (ORM) frameworks like Hibernate. This API is less verbose and provides a more intuitive and Kotlin-centric way to interact with your database. ...
payload) } else { null } } } } DatabaseFactory.init() configureRouting() }.start(wait = true) } class ApiException( val statusCode: Int, override val message: String ) : RuntimeException(message) data class ErrorResponse(val message: String) 3. 路由配置 (Routing.kt) 代码语言:kotlin ...