我在播放框架2.3中使用anorm 2.4支持postgresql 9.4
给出这样的模型:
case class EmailQueue(id:UUID,
send_from:String,
send_to:String,
subject:String,
body:String,
created_date:Date,
is_sent:Boolean,
email_template:String)
这是我的解析器:
val parser: RowParser[EmailQueue] = {
get[UUID]("id") ~
get[String]("send_from") ~
get[String]("send_to") ~
get[String]("subject") ~
get[String]("body") ~
get[Date]("created_date") ~
get[Boolean]("is_sent") ~
get[String]("email_template") map {
case id ~ send_from ~ send_to ~ subject ~ body ~
created_date ~ is_sent ~ email_template=> EmailQueue(id,
send_from,
send_to,
subject,
body,
created_date,
is_sent,
email_template)
}
}
这是我的插入声明:
def insert(email:EmailQueue): Unit ={
DB.withTransaction { implicit c =>
SQL(s"""
INSERT INTO "email_queue" ( "body", "created_date", "id", "is_sent", "send_from", "send_to", "subject", "email_template")
VALUES ( {body}, {created_date}, {id}, {is_sent}, {send_from}, {send_to}, {subject}, {email_template} );
""").on(
"body" -> email.body,
"created_date" -> email.created_date,
"id" -> email.id,
"is_sent" -> email.is_sent,
"send_from" -> email.send_from,
"send_to" -> email.send_to,
"subject" -> email.subject,
"email_template" -> email.email_template
).executeInsert()
}
}
插入时收到以下错误:
[error] PSQLException :: ERROR:列“id”的类型为uuid但是 表达式是字符变化的类型[错误]提示:您将需要 重写或转换表达式。 [错误]位置:153 (xxxxxxxxxx.java:2270)
此查询创建数据库表:
CREATE TABLE email_queue (
id UUID PRIMARY KEY,
send_from VARCHAR(255) NOT NULL,
send_to VARCHAR(255) NOT NULL,
subject VARCHAR(2000) NOT NULL,
body text NOT NULL,
created_date timestamp without time zone DEFAULT now(),
is_sent BOOLEAN NOT NULL DEFAULT FALSE,
email_template VARCHAR(2000) NOT NULL
);
答案 0 :(得分:7)
Anorm与数据库无关,因为JDBC,默认情况下不支持供应商特定的数据类型。
您可以在语句中使用{id}::uuid
,以便在JDBC参数中作为String传递的java.util.UUID
然后从传递的VARCHAR
转换为特定的PostgreSQL uuid
。< / p>
不建议在
SQL(s"...")
中使用字符串插值(SQL注入),但可以使用Anorm插值。
def insert(email:EmailQueue): Unit = DB.withTransaction { implicit c =>
SQL"""
INSERT INTO "email_queue" ( "body", "created_date", "id", "is_sent", "send_from", "send_to", "subject", "email_template")
VALUES ( ${email.body}, ${email.created_date}, ${email.id}::uuid, ${email.is_sent}, ${email.send_from}, ${email.send_to}, ${email.subject}, ${email.email_template} )
""").executeInsert()
}
不推荐,但有时对于供应商特定类型有用,
anorm.Object
可用于将不透明值作为JDBC参数传递(::uuid
对我来说更好)。您还可以实施自定义
ToStatement[java.util.UUID]
。