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- 增加 ICodeFirst.IsGenerateCommandParameterWithLambda 选项，开启表达式解析的命令参数化；

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- 增加 ExpressionCallContext 自定义函数上下文档 DbParameter 属性；
- 修复 IncludeMany(a => a.x1.x2.Childs) 当 x1, x2 为 null 的报 null 错误；
This commit is contained in:
28810
2019-11-22 21:55:36 +08:00
parent 12be7f0051
commit e9a8ad70a1
54 changed files with 518 additions and 746 deletions
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35
FreeSql/Internal/CommonExpression.cs
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@@ -423,13 +423,14 @@ namespace FreeSql.Internal
return $"({ExpressionLambdaToSql(leftExp, tsc)} {oper} {ExpressionLambdaToSql(rightExp, tsc)})";
}
Type oldMapType = null;
var left = ExpressionLambdaToSql(leftExp, tsc);
var leftMapColumn = SearchColumnByField(tsc._tables, tsc.currentTable, left);
var isLeftMapType = leftMapColumn != null && new[] { "AND", "OR" }.Contains(oper) == false && (leftMapColumn.Attribute.MapType != rightExp.Type || leftMapColumn.CsType != rightExp.Type);
ColumnInfo rightMapColumn = null;
var isRightMapType = false;
if (isLeftMapType) tsc.mapType = leftMapColumn.Attribute.MapType;
if (isLeftMapType) oldMapType = tsc.SetMapTypeReturnOld(leftMapColumn.Attribute.MapType);
var right = ExpressionLambdaToSql(rightExp, tsc);
if (right != "NULL" && isLeftMapType)
{
@@ -443,7 +444,7 @@ namespace FreeSql.Internal
isRightMapType = rightMapColumn != null && new[] { "AND", "OR" }.Contains(oper) == false && (rightMapColumn.Attribute.MapType != leftExp.Type || rightMapColumn.CsType != leftExp.Type);
if (isRightMapType)
{
tsc.mapType = rightMapColumn.Attribute.MapType;
oldMapType = tsc.SetMapTypeReturnOld(rightMapColumn.Attribute.MapType);
left = ExpressionLambdaToSql(leftExp, tsc);
if (left != "NULL" && isRightMapType)
{
@@ -495,7 +496,7 @@ namespace FreeSql.Internal
else right = GetBoolString(right);
break;
}
tsc.mapType = null;
tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
return $"{left} {oper} {right}";
}
static ConcurrentDictionary<Type, bool> _dicTypeExistsExpressionCallAttribute = new ConcurrentDictionary<Type, bool>();
@@ -532,7 +533,7 @@ namespace FreeSql.Internal
return ExpressionLambdaToSql((exp as UnaryExpression)?.Operand, tsc);
case ExpressionType.Negate:
case ExpressionType.NegateChecked: return "-" + ExpressionLambdaToSql((exp as UnaryExpression)?.Operand, tsc);
case ExpressionType.Constant: return formatSql((exp as ConstantExpression)?.Value, tsc.mapType, tsc.mapColumnTmp, tsc.dbParams);
case ExpressionType.Constant: return formatSql((exp as ConstantExpression)?.Value, tsc.mapType, tsc.mapColumnTmp, null);
case ExpressionType.Conditional:
var condExp = exp as ConditionalExpression;
return $"case when {ExpressionLambdaToSql(condExp.Test, tsc)} then {ExpressionLambdaToSql(condExp.IfTrue, tsc)} else {ExpressionLambdaToSql(condExp.IfFalse, tsc)} end";
@@ -543,15 +544,21 @@ namespace FreeSql.Internal
{
var ecc = new ExpressionCallContext { DataType = _ado.DataType };
var exp3MethodParams = exp3.Method.GetParameters();
for (var a = 0; a < exp3.Arguments.Count; a++)
var dbParamsIndex = tsc.dbParams?.Count;
ecc.Values.Add(exp3MethodParams[0].Name, ExpressionLambdaToSql(exp3.Arguments[0], tsc));
if (tsc.dbParams?.Count > dbParamsIndex) ecc.DbParameter = tsc.dbParams.Last();
List<DbParameter> oldDbParams = tsc.dbParams;
tsc.dbParams = null;
for (var a = 1; a < exp3.Arguments.Count; a++)
if (exp3.Arguments[a].Type != typeof(ExpressionCallContext))
ecc.Values.Add(exp3MethodParams[a].Name, ExpressionLambdaToSql(exp3.Arguments[a], tsc));
tsc.dbParams = oldDbParams;
var exp3InvokeParams = new object[exp3.Arguments.Count];
for (var a = 0; a < exp3.Arguments.Count; a++)
{
if (exp3.Arguments[a].Type != typeof(ExpressionCallContext))
exp3InvokeParams[a] = exp3.Arguments[a].Type.CreateInstanceGetDefaultValue();
exp3InvokeParams[a] = Utils.GetDataReaderValue(exp3.Arguments[a].Type, ecc.Values[exp3MethodParams[a].Name]);// exp3.Arguments[a].Type.CreateInstanceGetDefaultValue();
else
exp3InvokeParams[a] = ecc;
}
@@ -1321,13 +1328,13 @@ namespace FreeSql.Internal
public string formatSql(object obj, Type mapType, ColumnInfo mapColumn, List<DbParameter> dbParams)
{
//参数化设置，日后优化
//if (dbParams != null && mapColumn != null)
//{
// var paramName = $"exp_{dbParams.Count}";
// var parm = _common.AppendParamter(dbParams, paramName, mapColumn, mapType ?? mapColumn.Attribute.MapType, mapType == null ? obj : Utils.GetDataReaderValue(mapType, obj));
// _common.SetParameterSize(parm, mapColumn.Attribute.DbType, mapColumn);
// return _common.QuoteParamterName(paramName);
//}
if (dbParams != null)
{
var paramName = $"exp_{dbParams.Count}";
var parm = _common.AppendParamter(dbParams, paramName, mapColumn,
mapType ?? mapColumn?.Attribute.MapType ?? obj?.GetType(), mapType == null ? obj : Utils.GetDataReaderValue(mapType, obj));
return _common.QuoteParamterName(paramName);
}
return string.Concat(_ado.AddslashesProcessParam(obj, mapType, mapColumn));
}
}