How to make Room Entities

An entity is, in short, a type that a database table can be or in other words a type of object that a database can hold.

I usually keep my Entities in a Model.kt file inside a model package

@Entity
data class Recipe(
    @PrimaryKey
    @ColumnInfo("recipename")
     val recipeName: String
)
@Entity
data class Ingredient(
    @PrimaryKey 
    @ColumnInfo("ingredientName")
     val ingredientName: String
)

The code above shows a very simple data class named Recipe that holds a name value for recipe (recipeName) of type String, and another data class named Ingredient which holds a name value for an ingredient (ingredientName) also of type String.

For this article I decided to have very simple data classes but know that your classes can hold more variables if you want them to.

If you don’t know what those @ symbols all over mean ->

What are Room @Annotations

If you don’t know what @PrimaryKey does ->

What does @PrimaryKey do

If you don’t know what @Entity does ->

What does @Entity do

If you don’t know what @ColumnInfo does->

What does @ColumnInfo do