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Add Queryable.ToParentList

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This commit is contained in:
skx
2021-02-20 11:34:57 +08:00
parent fb1235858f
commit c5ffc1cea8
2 changed files with 60 additions and 9 deletions
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50
Src/Asp.Net/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
View File

@@ -795,6 +795,56 @@ namespace SqlSugar
{
return this.Context.Utilities.SerializeObject(this.ToPageList(pageIndex, pageSize, ref totalNumber), typeof(T));
}
public List<T> ToParentList(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue)
{
List<T> result = new List<T>() { };
var entity = this.Context.EntityMaintenance.GetEntityInfo<T>();
Check.Exception(entity.Columns.Where(it => it.IsPrimarykey).Count() == 0, "No Primary key");
var parentIdName = (parentIdExpression as MemberExpression).Member.Name;
var ParentInfo = entity.Columns.First(it => it.PropertyName == parentIdName);
var parentPropertyName= ParentInfo.DbColumnName;
var current = this.Context.Queryable<T>().InSingle(primaryKeyValue);
if (current != null)
{
result.Add(current);
object parentId = ParentInfo.PropertyInfo.GetValue(current,null);
int i = 0;
while (parentId!=null&&this.Context.Queryable<T>().In(parentId).Any())
{
Check.Exception(i > 100, ErrorMessage.GetThrowMessage("Dead cycle", "出现死循环或超出循环上限（100），检查最顶层的ParentId是否是null或者0"));
var parent = this.Context.Queryable<T>().InSingle(parentId);
result.Add(parent);
parentId= ParentInfo.PropertyInfo.GetValue(parent, null);
++i;
}
}
return result;
}
public async Task<List<T>> ToParentListAsync(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue)
{
List<T> result = new List<T>() { };
var entity = this.Context.EntityMaintenance.GetEntityInfo<T>();
Check.Exception(entity.Columns.Where(it => it.IsPrimarykey).Count() == 0, "No Primary key");
var parentIdName = (parentIdExpression as MemberExpression).Member.Name;
var ParentInfo = entity.Columns.First(it => it.PropertyName == parentIdName);
var parentPropertyName = ParentInfo.DbColumnName;
var current =await this.Context.Queryable<T>().InSingleAsync(primaryKeyValue);
if (current != null)
{
result.Add(current);
object parentId = ParentInfo.PropertyInfo.GetValue(current, null);
int i = 0;
while (parentId != null &&await this.Context.Queryable<T>().In(parentId).AnyAsync())
{
Check.Exception(i > 100, ErrorMessage.GetThrowMessage("Dead cycle", "出现死循环或超出循环上限（100），检查最顶层的ParentId是否是null或者0"));
var parent =await this.Context.Queryable<T>().InSingleAsync(parentId);
result.Add(parent);
parentId = ParentInfo.PropertyInfo.GetValue(parent, null);
++i;
}
}
return result;
}
public List<T> ToTree(Expression<Func<T, IEnumerable<object>>> childListExpression, Expression<Func<T, object>> parentIdExpression, object rootValue)
{
var entity = this.Context.EntityMaintenance.GetEntityInfo<T>();

3
Src/Asp.Net/SqlSugar/Interface/IQueryable.cs
View File

@@ -139,7 +139,8 @@ namespace SqlSugar
string ToJsonPage(int pageIndex, int pageSize, ref int totalNumber);
Task<string> ToJsonPageAsync(int pageIndex, int pageSize, RefAsync<int> totalNumber);
KeyValuePair<string, List<SugarParameter>> ToSql();
List<T> ToParentList(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue);
Task<List<T>> ToParentListAsync(Expression<Func<T, object>> parentIdExpression, object primaryKeyValue);
List<T> ToTree(Expression<Func<T,IEnumerable<object>>> childListExpression, Expression<Func<T,object>> parentIdExpression,object rootValue);
Task<List<T>> ToTreeAsync(Expression<Func<T, IEnumerable<object>>> childListExpression, Expression<Func<T, object>> parentIdExpression, object rootValue);
DataTable ToDataTable();