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Add SqlFunc.Exists

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This commit is contained in:
sunkaixuan 2022-09-10 10:58:22 +08:00
parent cd7dfd036d
commit 90367a461c
5 changed files with 57 additions and 1 deletions
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25
Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs
View File

@ -572,6 +572,31 @@ namespace SqlSugar
var parameter4 = model.Args[3];
return $" STUFF ({parameter1.MemberName}, {parameter2.MemberName}, {parameter3.MemberName}, {parameter4.MemberName}) ";
}
public virtual string Exists(MethodCallExpressionModel model)
{
var parameter1 = model.Args[0];
if (model.Args.Count > 1)
{
var parameter2 = model.Args[1];
if (UtilMethods.IsParentheses(parameter1.MemberName))
{
parameter1.MemberName = $" {parameter1.MemberName.ObjToString().Trim().TrimEnd(')')} AND {parameter2.MemberName}) ";
}
else
{
parameter1.MemberName = $" {parameter1.MemberName} AND {parameter2.MemberName} ";
}
}
if (UtilMethods.IsParentheses(parameter1.MemberName))
{
return $" Exists{parameter1.MemberName} ";
}
else
{
return $" Exists({parameter1.MemberName}) ";
}
}
public virtual string GetDateString(string dateValue, string format)
{
return null;

2
Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs
View File

@ -89,7 +89,7 @@ namespace SqlSugar
string Stuff(MethodCallExpressionModel model);
string RowNumber(MethodCallExpressionModel model);
string RowCount(MethodCallExpressionModel model);
string Exists(MethodCallExpressionModel model);
string GetDateString(string dateValue,string format);
string GetForXmlPath();
}

17
Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
View File

@ -115,6 +115,23 @@ namespace SqlSugar
{
return thisValue.Equals(parameterValue);
}
public static bool Exists(string subQueryableName_Or_OneToOnePropertyName)
{
throw new NotSupportedException("Can only be used in expressions");
}
public static bool Exists<valueType>(valueType subQueryableName_Or_OneToOnePropertyName) where valueType : struct
{
throw new NotSupportedException("Can only be used in expressions");
}
public static bool Exists(string subQueryableName_Or_OneToOnePropertyName, List<IConditionalModel> conditionalModels)
{
throw new NotSupportedException("Can only be used in expressions");
}
public static bool Exists<valueType>(valueType subQueryableName_Or_OneToOnePropertyName, List<IConditionalModel> conditionalModels) where valueType : struct
{
throw new NotSupportedException("Can only be used in expressions");
}
public static bool DateIsSame(DateTime date1, DateTime date2)
{
return date1.ToString("yyyy-MM-dd") == date2.ToString("yyyy-MM-dd");

10
Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs
View File

@ -1018,6 +1018,16 @@ namespace SqlSugar
return this.Context.DbMehtods.RowNumber(model);
case "RowCount":
return this.Context.DbMehtods.RowCount(model);
case "Exists":
if (model.Args.Count > 1)
{
this.Context.Parameters.RemoveAll(it => model.Args[1].MemberName.ObjToString().Contains(it.ParameterName) );
List<IConditionalModel> conditionalModels = (List<IConditionalModel>) model.Args[1].MemberValue;
var sqlObj = this.Context.SugarContext.Context.Queryable<object>().SqlBuilder.ConditionalModelToSql(conditionalModels, 0);
model.Args[1].MemberName = sqlObj.Key;
this.Context.Parameters.AddRange(sqlObj.Value);
}
return this.Context.DbMehtods.Exists(model);
default:
break;
}

4
Src/Asp.Net/SqlSugar/Utilities/UtilMethods.cs
View File

@ -16,6 +16,10 @@ namespace SqlSugar
{
public class UtilMethods
{
public static bool IsParentheses(object name)
{
return name.ObjToString().Trim().Last() == ')' && name.ObjToString().Trim().First() == '(';
}
internal static bool IsDefaultValue(object value)
{