Question

我想用DB.connection调用函数内部的函数，如果我只是使用下面的代码，我收到此错误：could not find implicit value for parameter connection: java.sql.Connection。

def insert(data: Recap, action_type: String, username: String, parent_page: String) =  DB.withConnection { implicit c => 
        //other code is omitted
            case Some(last_inserted_id) => {
                if(parent_page == "SO")
                    insert_SO(data, employee_id, status, last_inserted_id)//problem
                else if(parent_page == "PO")
                    insert_PO(data, employee_id, status, last_inserted_id)//problem
        //other code is omitted
    }

def insert_SO(data: Recap, employee_id: String, status: Int, last_inserted_id: Long) = {
        var so_id_list: Set[Long] = Set()
        for(ls <- data.recap_items)
            for(rs <- ls.invoice_items)
                so_id_list = so_id_list ++ Set(rs.id)

        for(ls <- so_id_list){
            if(status == 20){
                SQL("""UPDATE salesorder SET recap_id = {recap_id}, approved_id = {approved_id}, approved_datetime = NOW(), status = 20 WHERE salesorder.id = {so_id}""").on(
                'recap_id -> last_inserted_id, 'approved_id -> employee_id, 'so_id -> ls).executeUpdate()
       //other code is omitted
    }
def insert_PO(data: Recap, employee_id: String, status: Int, last_inserted_id: Long) = {
        var po_id_list: Set[Long] = Set()
        for(ls <- data.recap_items)
            for(rs <- ls.invoice_items)
                po_id_list = po_id_list ++ Set(rs.id)

        for(ls <- po_id_list){
            if(status == 20){
                SQL("""UPDATE PurchaseOrder SET recap_id = {recap_id}, approved_id = {approved_id}, approved_datetime = NOW(), status = 20 WHERE PurchaseOrder.id = {po_id}""").on(
                'recap_id -> last_inserted_id, 'approved_id -> employee_id, 'po_id -> ls).executeUpdate()
        //other code is omitted
    }

我相信如果我将DB.withConnection添加到insert_SO和insert_PO函数中，它会起作用，但我不确定这是否是我创建以来的良好做法与DB的另一个连接。

Answer 1

您需要Connection来运行查询，并且可以从play.api.db.DB帮助程序中检索一个

  def insert_SO(data: Recap, employee_id: String, status: Int, last_inserted_id: Long) = {
    DB.withConnection { implicit c =>
        // other operations
        SQL(......).executeUpdate()
    }
  }

withConnection每次调用时都会获取并关闭连接。

尝试忽略for循环使用Batch Query代替for loop

def insert_SO(data: Recap, employee_id: String, status: Int, last_inserted_id: Long) = {    
 DB.withConnection { implicit c =>
  //other operations
  val posQuery = SQL("""UPDATE salesorder SET recap_id = {recap_id}, approved_id = {approved_id}, approved_datetime = NOW(), status = 20 WHERE salesorder.id = {so_id}""")
  val posBatchQuery = (posQuery.asBatch /: so_id_list){(sql, ls) =>
    sql.addBatchParams(last_inserted_id,employee_id,ls)
  }  
  val posBatchAry = posBatchQuery.execute
  }
}

Play-Scala：调用DB.withConnection中的另一个函数

1 个答案: