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- 增加 WhereCascade/GlobalFilter 表达式子查询的支持；

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This commit is contained in:
28810
2020-05-02 11:17:59 +08:00
parent d24969d9b1
commit 1e83a7eeaa
4 changed files with 20 additions and 8 deletions
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15
FreeSql/Internal/CommonExpression.cs
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@ -1438,7 +1438,8 @@ namespace FreeSql.Internal
{
if (_whereCascadeExpression.Any())
{
var newParameter = Expression.Parameter(tb.Table.Type, "c");
var newParameter = Expression.Parameter(tb.Table.Type, tb.Alias);
tb.Parameter = newParameter;
var sb = new StringBuilder();
var isEmpty = true;
@ -1452,10 +1453,10 @@ namespace FreeSql.Internal
{
var expExp = Expression.Lambda(
typeof(Func<,>).MakeGenericType(tb.Table.Type, typeof(bool)),
new ReplaceVisitor().Modify(fl.Body, newParameter),
new ReplaceVisitor().Modify(fl, newParameter),
newParameter
);
var whereSql = ExpressionLambdaToSql(expExp.Body, new ExpTSC { _tables = null, _selectColumnMap = null, getSelectGroupingMapString = null, tbtype = SelectTableInfoType.From, isQuoteName = true, isDisableDiyParse = false, style = ExpressionStyle.Where, currentTable = tb.Table, alias001 = tb.Alias });
var whereSql = ExpressionLambdaToSql(expExp.Body, new ExpTSC { _tables = new List<SelectTableInfo>(new[] { tb }), _selectColumnMap = null, getSelectGroupingMapString = null, tbtype = SelectTableInfoType.From, isQuoteName = true, isDisableDiyParse = false, style = ExpressionStyle.Where, currentTable = tb.Table, alias001 = tb.Alias });
whereSql = GetBoolString(expExp.Body, whereSql);
if (isEmpty == false)
sb.Append(" AND ");
@ -1478,14 +1479,16 @@ namespace FreeSql.Internal
internal class ReplaceVisitor : ExpressionVisitor
{
private ParameterExpression parameter;
public Expression Modify(Expression expression, ParameterExpression parameter)
private ParameterExpression oldParameter;
public Expression Modify(LambdaExpression lambda, ParameterExpression parameter)
{
this.parameter = parameter;
return Visit(expression);
this.oldParameter = lambda.Parameters.FirstOrDefault();
return Visit(lambda.Body);
}
protected override Expression VisitMember(MemberExpression node)
{
if (node.Expression?.NodeType == ExpressionType.Parameter)
if (node.Expression?.NodeType == ExpressionType.Parameter && node.Expression == oldParameter)
return Expression.Property(parameter, node.Member.Name);
return base.VisitMember(node);
}

2
FreeSql/Internal/GlobalFilter.cs
View File

@ -35,7 +35,7 @@ namespace FreeSql.Internal
var newParameter = Expression.Parameter(typeof(TEntity), $"gf{_id}");
var newlambda = Expression.Lambda<Func<TEntity, bool>>(
new CommonExpression.ReplaceVisitor().Modify(where.Body, newParameter),
new CommonExpression.ReplaceVisitor().Modify(where, newParameter),
newParameter
);
item.Where = newlambda;