How to make Primary key Auto increment while using Composite Primary keys in Room persistent library?
I found another way around for this problem because as per my knowledge after some R&D, we can not have auto increment property in Composite Primary keys. So I used indices and unique constraint here because Room does not have direct UNIQUE constraint till now. So below is my working code:
@Entity(tableName = "newsPapers", indices = {@Index(value =
{"news_paper_name"}, unique = true)})
public class SelectNewsModel {
@PrimaryKey(autoGenerate = true)
private int news_paper_id;
@ColumnInfo(name = "image_url")
private String imageUrl;
@ColumnInfo(name = "news_paper_name")
private String newsPaperName;
}
Priyanka Alachiya's answer is right, but I needed sample in Kotlin...
For Kotlin:
@Entity(tableName = "newsPapers", indices = arrayOf(Index(value = ["news_paper_name"], unique = true)))
Here Kotlin solution