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- 增加 HzyTuple 表达式替换类；

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This commit is contained in:
2881099
2020-11-02 22:24:59 +08:00
parent f3bc47feca
commit 768cbdc97a
6 changed files with 51 additions and 2 deletions
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33
FreeSql/Internal/CommonExpression.cs
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@ -1664,6 +1664,39 @@ namespace FreeSql.Internal
}
}
internal class ReplaceHzyTupleToMultiParam : ExpressionVisitor
{
private List<SelectTableInfo> tables;
private ParameterExpression[] parameters;
public LambdaExpression Modify(LambdaExpression lambda, List<SelectTableInfo> tables)
{
this.tables = tables;
parameters = tables.Select(a => a.Parameter ?? Expression.Parameter(a.Table.Type, a.Alias)).ToArray();
var exp = Visit(lambda.Body);
return Expression.Lambda(exp, parameters);
}
protected override Expression VisitMember(MemberExpression node)
{
int widx;
if (node.Expression?.NodeType == ExpressionType.MemberAccess)
{
var parent = node.Expression as MemberExpression;
if (parent.Expression?.NodeType == ExpressionType.Parameter &&
parent.Expression.Type.Name.StartsWith("NativeTuple`") == true &&
int.TryParse(parent.Member.Name.Replace("Item", ""), out widx) && widx > 0 && widx <= tables.Count)
return Expression.Property(parameters[widx - 1], node.Member.Name);
}
if (node.Expression?.NodeType == ExpressionType.Parameter &&
node.Expression.Type.Name.StartsWith("NativeTuple`") == true &&
int.TryParse(node.Member.Name.Replace("Item", ""), out widx) && widx > 0 && widx <= tables.Count)
return parameters[widx - 1];
return base.VisitMember(node);
}
}
public string formatSql(object obj, Type mapType, ColumnInfo mapColumn, List<DbParameter> dbParams)
{
//参数化设置，日后优化

2
FreeSql/Internal/CommonProvider/SelectProvider/Select0Provider.cs
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@ -60,7 +60,7 @@ namespace FreeSql.Internal.CommonProvider
#endif
_includeInfo.Clear();
_selectExpression = null;
_whereGlobalFilter.Clear();
_whereGlobalFilter?.Clear();
}
public static void CopyData(Select0Provider from, Select0Provider to, ReadOnlyCollection<ParameterExpression> lambParms)

8
FreeSql/Internal/CommonProvider/SelectProvider/Select2Provider.cs
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@ -178,6 +178,14 @@ namespace FreeSql.Internal.CommonProvider
return this.Where(_commonExpression.ExpressionWhereLambda(_tables, exp?.Body, null, _whereGlobalFilter, _params));
}
ISelect<T1, T2> ISelect<T1, T2>.Where(Expression<Func<NativeTuple<T1, T2>, bool>> exp)
{
if (exp == null) return this.Where(null);
var exp2 = new CommonExpression.ReplaceHzyTupleToMultiParam().Modify(exp, _tables);
for (var a = 0; a < exp2.Parameters.Count; a++) _tables[a].Parameter = exp2.Parameters[a];
return this.Where(_commonExpression.ExpressionWhereLambda(_tables, exp2, null, _whereGlobalFilter, _params));
}
bool ISelect<T1, T2>.Any(Expression<Func<T1, T2, bool>> exp)
{
if (exp == null) return this.Any();