Add referential integrity to remove user's props when user is deleted

db/migration/20210625223901_add_referential_integrity_to_user_props.go

@@ -0,0 +1,38 @@
+package migrations
+
+import (
+	"database/sql"
+
+	"github.com/pressly/goose"
+)
+
+func init() {
+	goose.AddMigration(upAddReferentialIntegrityToUserProps, downAddReferentialIntegrityToUserProps)
+}
+
+func upAddReferentialIntegrityToUserProps(tx *sql.Tx) error {
+	_, err := tx.Exec(`
+create table user_props_dg_tmp
+(
+	user_id varchar not null
+		constraint user_props_user_id_fk
+			references user
+				on update cascade on delete cascade,
+	key varchar not null,
+	value varchar,
+	constraint user_props_pk
+		primary key (user_id, key)
+);
+
+insert into user_props_dg_tmp(user_id, key, value) select user_id, key, value from user_props;
+
+drop table user_props;
+
+alter table user_props_dg_tmp rename to user_props;
+`)
+	return err
+}
+
+func downAddReferentialIntegrityToUserProps(tx *sql.Tx) error {
+	return nil
+}