我使用的是Play Framework 2.3,在尝试创建自己的sql查询时,我总是在映射忽略方面遇到麻烦。
我不知道我是否应该使用Ebean编写这个复杂的sql查询。
这是SQL查询工作得很好:
SELECT g.id,
concat(g.client_id,'-',trim(to_char(n.number,'099999'))) as reference,
(
SELECT sum(total_ttc)
from global_commission_invoice_line
where global_commission_invoice_id= g.id
) as totalTTC
from global_commission_invoice g
LEFT JOIN invoice_number n on g.invoice_number_id = n.id
LEFT JOIN client c2 on g.client_id = c2.id
我尝试用ebean解析它,因为我有一个带有参数的 WHEN 子句。
我的Java代码简要如下。
String sql = " SELECT g.id, " +
" concat(g.client_id,'-',trim(to_char(n.number,'099999'))) as reference," +
" (" +
" SELECT sum(total_ttc)" +
" from global_commission_invoice_line" +
" where global_commission_invoice_id= g.id" +
" ) as totalTTC " +
" from global_commission_invoice g" +
" LEFT JOIN invoice_number n on g.invoice_number_id = n.id" +
" LEFT JOIN client c2 on g.client_id = c2.id";
// Create sql
RawSql rawSql = RawSqlBuilder.parse(sql)
.columnMapping("g.id","id")
.columnMappingIgnore("concat(g.client_id,'-',trim(to_char(n.number,'099999')))")
.columnMappingIgnore("( SELECT sum(total_ttc) from global_commission_invoice_line where global_commission_invoice_id= g.id )")
.create();
return Ebean.find(models.GlobalCommissionInvoice.class).setRawSql(rawSql)
.findList()
此映射忽略成功,并且没有错误:
.columnMappingIgnore("( SELECT sum(total_ttc) from global_commission_invoice_line where global_commission_invoice_id= g.id )")
但是这个:
.columnMappingIgnore("concat(g.client_id,'-',trim(to_char(n.number,'099999')))")
返回此错误:
Execution exception[[IllegalArgumentException: DB Column [ concat(g.client_id, '-', trim(to_char(n.number, '099999')))] not found in mapping. Expecting one of [[g.id, concat(g.client_id, '-', trim(to_char(n.number, '099999'))), ( SELECT sum(total_ttc) from global_commission_invoice_line where global_commission_invoice_id= g.id )]]]]
有时候我发现错误,大约是一个空格或一个换行符放错了位置,但我从来不知道如何真正地将它用于复杂的查询,而又不搜索为什么我会出错几个小时。
我应该对这种类型的sql查询使用ebean吗?我在使用映射时会严重忽略吗?
P.S。 :对不起,我的英语,我是法语
答案 0 :(得分:0)
我找到了解决方案。我调试了ebean RawSql类,并使映射与ebean映射匹配。
在每个逗号处Ebean slice SELECT 语句,因此我的 concat 函数分为三部分。
解决方案:
// Create sql
RawSql rawSql = RawSqlBuilder.parse(sqlStringBuilder.getStrStatement())
.columnMapping("g.id","id")
.columnMappingIgnore("concat(g.client_id")
.columnMappingIgnore("'-'")
.columnMappingIgnore("trim(to_char(n.number")
.columnMappingIgnore("'099999')))")
.columnMappingIgnore("( SELECT sum(total_ttc) from global_commission_invoice_line where global_commission_invoice_id= g.id )")
.create();