Insert
@Target(allowedTargets = [AnnotationTarget.FUNCTION])
@Retention(value = AnnotationRetention.BINARY)
public annotation Insert
Marks a method in a Dao annotated class as an insert method.
The implementation of the method will insert its parameters into the database.
All of the parameters of the Insert method must either be classes annotated with Entity or collections/array of it.
Example:
@Dao
interface MusicDao {
@Insert(onConflict = OnConflictStrategy.REPLACE)
fun insertSongs(varargs songs: Song)
@Insert
fun insertBoth(song1: Song, song2: Song)
@Insert
fun insertAlbumWithSongs(album: Album, songs: List<Song>)
}
If the target entity is specified via entity then the parameters can be of arbitrary POJO types that will be interpreted as partial entities. For example:
@Entity
data class Playlist (
@PrimaryKey(autoGenerate = true)
val playlistId: Long,
val name: String,
val description: String?,
@ColumnInfo(defaultValue = "normal")
val category: String,
@ColumnInfo(defaultValue = "CURRENT_TIMESTAMP")
val createdTime: String,
@ColumnInfo(defaultValue = "CURRENT_TIMESTAMP")
val lastModifiedTime: String
)
data class NameAndDescription (
val name: String,
val description: String
)
@Dao
interface PlaylistDao {
@Insert(entity = Playlist::class)
fun insertNewPlaylist(nameDescription: NameAndDescription)
}
Summary
Public methods |
|
|---|---|
final @NonNull KClass<@NonNull ?> |
The target entity of the insert method. |
final int |
What to do if a conflict happens. |
Public methods
getEntity
public final @NonNull KClass<@NonNull ?> getEntity()
The target entity of the insert method.
When this is declared, the insert method parameters are interpreted as partial entities when the type of the parameter differs from the target. The POJO class that represents the entity must contain all of the non-null fields without default values of the target entity.
If the target entity contains a PrimaryKey that is auto generated, then the POJO class doesn't need an equal primary key field, otherwise primary keys must also be present in the POJO.
By default the target entity is interpreted by the method parameters.
getOnConflict
@OnConflictStrategy
public final int getOnConflict()
What to do if a conflict happens.
Use OnConflictStrategy.ABORT (default) to roll back the transaction on conflict. Use OnConflictStrategy.REPLACE to replace the existing rows with the new rows. Use OnConflictStrategy.IGNORE to keep the existing rows.
| Returns | |
|---|---|
int |
How to handle conflicts. Defaults to |