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Update exp to sql

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This commit is contained in:
sunkaixuan 2019-04-27 15:14:59 +08:00
parent 9889fe3b3b
commit 84b17cd3a8
2 changed files with 37 additions and 6 deletions
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3
Src/Asp.Net/SqlServerTest/Demos/1_Query.cs
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@ -458,7 +458,8 @@ namespace OrmTest.Demo
isAny = SqlFunc.Subqueryable<School>().Any()?1:2
}).ToList();
var test56= db.Queryable<Student>().Select(it=> new {
isAny=SqlFunc.Subqueryable<School>().Any()
isAny=SqlFunc.Subqueryable<Student>().Any(),
isAny2 = SqlFunc.Subqueryable<Student>().Where(s=>false).Any()
}).ToList();
}

40
Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BaseResolve.cs
View File

@ -342,7 +342,7 @@ namespace SqlSugar
{
var expression = ((UnaryExpression)item).Operand as MemberExpression;
var isDateTimeNow = ((UnaryExpression)item).Operand.ToString() == "DateTime.Now";
if (expression.Expression == null&&!isDateTimeNow)
if (expression.Expression == null && !isDateTimeNow)
{
this.Context.Result.CurrentParameter = parameter;
this.Context.Result.IsLockCurrentParameter = true;
@ -353,7 +353,7 @@ namespace SqlSugar
this.Context.Result.Append(this.Context.GetAsString(asName, parameter.CommonTempData.ObjToString()));
this.Context.Result.CurrentParameter = null;
}
else if (expression.Expression is ConstantExpression||isDateTimeNow)
else if (expression.Expression is ConstantExpression || isDateTimeNow)
{
string parameterName = this.Context.SqlParameterKeyWord + "constant" + this.Context.ParameterIndex;
this.Context.ParameterIndex++;
@ -400,7 +400,8 @@ namespace SqlSugar
}
this.Context.Result.Append(this.Context.GetAsString(asName, newContext.Result.GetString()));
this.Context.Result.CurrentParameter = null;
if (this.Context.SingleTableNameSubqueryShortName.IsNullOrEmpty() && newContext.SingleTableNameSubqueryShortName.HasValue()) {
if (this.Context.SingleTableNameSubqueryShortName.IsNullOrEmpty() && newContext.SingleTableNameSubqueryShortName.HasValue())
{
this.Context.SingleTableNameSubqueryShortName = newContext.SingleTableNameSubqueryShortName;
}
}
@ -427,7 +428,8 @@ namespace SqlSugar
var propertyName = property.Name;
var dbColumnName = propertyName;
var mappingInfo = this.Context.MappingColumns.FirstOrDefault(it => it.EntityName == item.Type.Name && it.PropertyName.Equals(propertyName, StringComparison.CurrentCultureIgnoreCase));
if (mappingInfo.HasValue()) {
if (mappingInfo.HasValue())
{
dbColumnName = mappingInfo.DbColumnName;
}
asName = this.Context.GetTranslationText(item.Type.Name + "." + propertyName);
@ -442,7 +444,30 @@ namespace SqlSugar
}
}
}
else if (item is MethodCallExpression|| item is UnaryExpression||item is ConditionalExpression|| item.NodeType==ExpressionType.Coalesce)
else if (item.Type == UtilConstants.BoolType && item is MethodCallExpression && (item as MethodCallExpression).Method.Name == "Any"&&IsSubMethod(item as MethodCallExpression))
{
this.Expression = item;
this.Start();
var sql= this.Context.DbMehtods.IIF(new MethodCallExpressionModel()
{
Args=new List<MethodCallExpressionArgs>() {
new MethodCallExpressionArgs() {
IsMember=true,
MemberName=parameter.CommonTempData.ObjToString()
},
new MethodCallExpressionArgs() {
IsMember=true,
MemberName=1
},
new MethodCallExpressionArgs() {
IsMember=true,
MemberName=0
}
}
});
parameter.Context.Result.Append(this.Context.GetAsString(asName, sql));
}
else if (item is MethodCallExpression || item is UnaryExpression || item is ConditionalExpression || item.NodeType == ExpressionType.Coalesce)
{
this.Expression = item;
this.Start();
@ -453,6 +478,11 @@ namespace SqlSugar
Check.ThrowNotSupportedException(item.GetType().Name);
}
}
protected bool IsSubMethod(MethodCallExpression express)
{
return SubTools.SubItemsConst.Any(it => express.Object != null && express.Object.Type.Name == "Subqueryable`1");
}
protected static Dictionary<string, string> MethodMapping = new Dictionary<string, string>() {
{ "ToString","ToString"},
{ "ToInt32","ToInt32"},