如何将主键作为Room Persistence lib的自动增量 [英] How to make primary key as autoincrement for Room Persistence lib

问题描述

我正在创建一个Entity(Room Persistence lib)类Food，我想在其中将foodId作为自动增量.

I am creating a Entity(Room Persistence lib) class Food, where i want to make foodId as autoincrement.

@Entity
class Food(var foodName: String, var foodDesc: String, var protein: Double, var carbs: Double, var fat: Double)
{
    @PrimaryKey
    var foodId: Int = 0
    var calories: Double = 0.toDouble()
}

如何设置foodId自动递增字段?

How can i set foodId an autoincrement field?

推荐答案

您需要使用autoGenerate属性

您的主键注释应如下:

@PrimaryKey(autoGenerate = true)

PrimaryKey .

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