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Error prompts for optimizing aliases for multi-table queries

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610262374@qq.com 2018-11-24 00:40:27 +08:00
parent f6d3241d1d
commit 56a3591307
4 changed files with 61 additions and 0 deletions
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25
Src/Asp.Net/SqlServerTest/UnitTest/Query/SelectQuery.cs
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@ -120,7 +120,32 @@ namespace OrmTest.UnitTest
}, t7.Key, t7.Value, "select t7 Error");
#endregion
try
{
var t8 = db.Queryable<Student, School, School>((st, sc, sc2) => new object[] {
JoinType.Left,st.SchoolId==sc.Id,
JoinType.Left,sc2.Id==sc.Id
}).Where(st => st.Id > 0)
.Select<School>((st1) => new School() { Id = st1.Id }).ToList();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
try
{
var t8 = db.Queryable<Student, School>((st, sc) =>st.Id==sc.Id).Where(st => st.Id > 0)
.Select<School>((st1) => new School() { Id = st1.Id }).ToList();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
}

10
Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
View File

@ -984,6 +984,7 @@ namespace SqlSugar
}
protected ISugarQueryable<TResult> _Select<TResult>(Expression expression)
{
QueryBuilder.CheckExpression(expression,"Select");
this.Context.InitMppingInfo<TResult>();
var result = InstanceFactory.GetQueryable<TResult>(this.Context.CurrentConnectionConfig);
result.Context = this.Context;
@ -994,12 +995,14 @@ namespace SqlSugar
}
protected void _Where(Expression expression)
{
QueryBuilder.CheckExpression(expression, "Where");
var isSingle = QueryBuilder.IsSingle();
var result = QueryBuilder.GetExpressionValue(expression, isSingle ? ResolveExpressType.WhereSingle : ResolveExpressType.WhereMultiple);
QueryBuilder.WhereInfos.Add(SqlBuilder.AppendWhereOrAnd(QueryBuilder.WhereInfos.IsNullOrEmpty(), result.GetResultString()));
}
protected ISugarQueryable<T> _OrderBy(Expression expression, OrderByType type = OrderByType.Asc)
{
QueryBuilder.CheckExpression(expression, "OrderBy");
var isSingle = QueryBuilder.IsSingle();
var lamResult = QueryBuilder.GetExpressionValue(expression, isSingle ? ResolveExpressType.FieldSingle : ResolveExpressType.FieldMultiple);
OrderBy(lamResult.GetResultString() + UtilConstants.Space + type.ToString().ToUpper());
@ -1007,6 +1010,7 @@ namespace SqlSugar
}
protected ISugarQueryable<T> _GroupBy(Expression expression)
{
QueryBuilder.CheckExpression(expression, "GroupBy");
LambdaExpression lambda = expression as LambdaExpression;
expression = lambda.Body;
var isSingle = QueryBuilder.IsSingle();
@ -1027,6 +1031,7 @@ namespace SqlSugar
}
protected TResult _Min<TResult>(Expression expression)
{
QueryBuilder.CheckExpression(expression, "Main");
var isSingle = QueryBuilder.IsSingle();
var lamResult = QueryBuilder.GetExpressionValue(expression, isSingle ? ResolveExpressType.FieldSingle : ResolveExpressType.FieldMultiple);
var result = Min<TResult>(lamResult.GetResultString());
@ -1035,12 +1040,14 @@ namespace SqlSugar
}
protected TResult _Avg<TResult>(Expression expression)
{
QueryBuilder.CheckExpression(expression, "Avg");
var isSingle = QueryBuilder.IsSingle();
var lamResult = QueryBuilder.GetExpressionValue(expression, isSingle ? ResolveExpressType.FieldSingle : ResolveExpressType.FieldMultiple);
return Avg<TResult>(lamResult.GetResultString());
}
protected TResult _Max<TResult>(Expression expression)
{
QueryBuilder.CheckExpression(expression, "Max");
var isSingle = QueryBuilder.IsSingle();
var lamResult = QueryBuilder.GetExpressionValue(expression, isSingle ? ResolveExpressType.FieldSingle : ResolveExpressType.FieldMultiple);
var reslut = Max<TResult>(lamResult.GetResultString());
@ -1049,6 +1056,7 @@ namespace SqlSugar
}
protected TResult _Sum<TResult>(Expression expression)
{
QueryBuilder.CheckExpression(expression, "Sum");
var isSingle = QueryBuilder.IsSingle();
var lamResult = QueryBuilder.GetExpressionValue(expression, isSingle ? ResolveExpressType.FieldSingle : ResolveExpressType.FieldMultiple);
var reslut = Sum<TResult>(lamResult.GetResultString());
@ -1083,6 +1091,7 @@ namespace SqlSugar
}
public ISugarQueryable<T> _PartitionBy(Expression expression)
{
QueryBuilder.CheckExpression(expression, "PartitionBy");
LambdaExpression lambda = expression as LambdaExpression;
expression = lambda.Body;
var isSingle = QueryBuilder.IsSingle();
@ -1103,6 +1112,7 @@ namespace SqlSugar
}
protected ISugarQueryable<T> _Having(Expression expression)
{
QueryBuilder.CheckExpression(expression, "Having");
var isSingle = QueryBuilder.IsSingle();
var lamResult = QueryBuilder.GetExpressionValue(expression, isSingle ? ResolveExpressType.WhereSingle : ResolveExpressType.WhereMultiple);
Having(lamResult.GetResultString());

19
Src/Asp.Net/SqlSugar/Abstract/SqlBuilderProvider/QueryBuilder.cs
View File

@ -508,5 +508,24 @@ namespace SqlSugar
var result = this.Context.EntityMaintenance.GetTableName(entityName);
return this.Builder.GetTranslationTableName(result);
}
public void CheckExpression(Expression expression, string methodName)
{
if (IsSingle() == false&& this.JoinExpression!=null)
{
var jsoinParameters = (this.JoinExpression as LambdaExpression).Parameters;
var currentParametres = (expression as LambdaExpression).Parameters;
if (currentParametres != null && currentParametres.Count > 0)
{
foreach (var item in currentParametres)
{
var index = currentParametres.IndexOf(item);
var name = item.Name;
var joinName = jsoinParameters[index].Name;
Check.Exception(name.ToLower() != joinName.ToLower(), ErrorMessage.ExpressionCheck, joinName, methodName, name);
}
}
}
}
}
}

7
Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/ErrorMessage.cs
View File

@ -37,5 +37,12 @@ namespace SqlSugar
return ErrorMessage.GetThrowMessage("Connection open error . {0}", " 连接数据库过程中发生错误，检查服务器是否正常连接字符串是否正确，实在找不到原因请先Google错误信息：{0}.");
}
}
public static string ExpressionCheck
{
get
{
return ErrorMessage.GetThrowMessage("Join {0} needs to be the same as {1} {2}", "别名不一致错误，{1}中的{2}需要和Join {0}中的名称一致，特殊需求可以使用.Select((x,y)=>new{{ id=x.id,name=y.name}}).MergeTable().Orderby(xxx=>xxx.Id)功能将Select中的多表结果集变成单表，这样就可以不限制别名一样");
}
}
}
}