package org.mercury_im.messenger.data.model; import io.requery.CascadeAction; import io.requery.Entity; import io.requery.ForeignKey; import io.requery.Generated; import io.requery.Key; import io.requery.ManyToOne; import io.requery.ReferentialAction; import io.requery.Table; @Entity @Table(name = "direct_messages") public abstract class AbstractDirectMessagesRelation { @Key @Generated long id; @ManyToOne(cascade = {CascadeAction.SAVE}) @ForeignKey(referencedColumn = "id", delete = ReferentialAction.CASCADE) DirectChatModel chat; @ManyToOne(cascade = {CascadeAction.SAVE, CascadeAction.DELETE}) @ForeignKey(referencedColumn = "id", delete = ReferentialAction.CASCADE) MessageModel message; }