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28810
2018-12-28 12:14:14 +08:00
parent 0689696766
commit 3ed1213865
8 changed files with 181 additions and 8 deletions
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19
FreeSql/Internal/CommonExpression.cs
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@ -26,12 +26,27 @@ namespace FreeSql.Internal {
case ExpressionType.Convert: return ReadAnonymousField(_tables, field, parent, ref index, (exp as UnaryExpression)?.Operand, getSelectGroupingMapString);
case ExpressionType.Constant:
var constExp = exp as ConstantExpression;
parent.DbField = _common.FormatSql("{0}", constExp?.Value);
//处理自定义SQL语句，如： ToList(new {
// ccc = "now()",
// partby = "sum(num) over(PARTITION BY server_id,os,rid,chn order by id desc)"
//})，有缺点即 ccc partby 接受类型都是 string，可配合 Convert.ToXxx 类型转换，请看下面的兼容
parent.DbField = constExp.Type.FullName == "System.String" ? (constExp.Value?.ToString() ?? "NULL") : _common.FormatSql("{0}", constExp?.Value);
field.Append(", ").Append(parent.DbField);
if (index >= 0) field.Append(" as").Append(++index);
return false;
case ExpressionType.Call:
parent.DbField = ExpressionLambdaToSql(exp, _tables, null, getSelectGroupingMapString, SelectTableInfoType.From, true);
var callExp = exp as MethodCallExpression;
//处理自定义SQL语句，如： ToList(new {
// ccc = Convert.ToDateTime("now()"),
// partby = Convert.ToDecimal("sum(num) over(PARTITION BY server_id,os,rid,chn order by id desc)")
//})
if (callExp.Method?.DeclaringType.FullName == "System.Convert" &&
callExp.Method.Name.StartsWith("To") &&
callExp.Arguments[0].NodeType == ExpressionType.Constant &&
callExp.Arguments[0].Type.FullName == "System.String")
parent.DbField = (callExp.Arguments[0] as ConstantExpression).Value?.ToString() ?? "NULL";
else
parent.DbField = ExpressionLambdaToSql(exp, _tables, null, getSelectGroupingMapString, SelectTableInfoType.From, true);
field.Append(", ").Append(parent.DbField);
if (index >= 0) field.Append(" as").Append(++index);
return false;