/// <summary>
/// Selects all.
/// </summary>
/// <returns></returns>
/// <exception cref="DatabaseException"></exception>
public virtual List <T> SelectAll()
{
var funcName = "SelectAll";
Logger.DebugFormat("{0}...", funcName);
List <T> result;
try
{
var queryArgs = new EntityQueryArgs <T>
{
StartRecordIndex = 0,
NumRecordsPerPage = AppConstants.MaxRecordsPerPage,
OrderByExpr = this.BuildOrderByExpression()
};
result = this.GetRecords(queryArgs);
}
catch (Exception ex)
{
Logger.ErrorFormat("{0} - Exception: {1}", funcName, ex.ToString());
throw new DatabaseException((int)DatabaseErrorCode.Load, ex);
}
Logger.DebugFormat("{0}...DONE", funcName);
return(result);
}
protected override void OnQuerying(EntityQueryArgs args)
{
var query = args.Query;
query.OrderBy.Add(query.MainTable.Column(AuditItem.LogTimeProperty), OrderDirection.Descending);
base.OnQuerying(args);
}
protected override void OnQuerying(EntityQueryArgs args)
{
var query = args.Query;
query.OrderBy.Add(query.MainTable.Column(DevLanguageItem.ContentProperty));
base.OnQuerying(args);
}
protected override void OnQuerying(EntityQueryArgs args)
{
var query = args.Query;
query.OrderBy.Add(query.MainTable.Column(MappingInfo.DevLanguageRDProperty));
base.OnQuerying(args);
}
protected override void OnQuerying(EntityQueryArgs args)
{
var query = args.Query;
query.OrderBy.Add(query.MainTable.Column(Tag.OrderNoProperty));
query.OrderBy.Add(query.MainTable.Column(Tag.IdProperty));
base.OnQuerying(args);
}
protected override void OnQuerying(EntityQueryArgs args)
{
var f = QueryFactory.Instance;
var q = args.Query;
q.Where = f.And(q.MainTable.Column(BookLoc.LengthProperty).GreaterEqual(0), q.Where);
base.OnQuerying(args);
}
protected override void OnQuerying(EntityQueryArgs args)
{
var q = args.Query;
q.OrderBy.Add(
qf.OrderBy(q.MainTable.Column(DbMigrationHistory.TimeIdProperty), OrderDirection.Descending)
);
base.OnQuerying(args);
}
/// <summary>
/// 子类重写此方法，查询从持久层加载列表的具体实现。
/// </summary>
/// <param name="args">The arguments.</param>
/// <param name="entityList">The entity list.</param>
/// <exception cref="System.NotSupportedException">使用内存过滤器的同时，不支持提供分页参数。</exception>
protected override void QueryListCore(EntityQueryArgs args, EntityList entityList)
{
var dp = RdbDataProvider.Get(this.Repo);
using (var dba = dp.CreateDbAccesser())
{
//以下代码，开始访问数据库查询数据。
var dbTable = dp.DbTable;
if (args.Filter != null)
{
#region 内存过滤式加载
if (!PagingInfo.IsNullOrEmpty(args.PagingInfo))
{
throw new NotSupportedException("使用内存过滤器的同时，不支持提供分页参数。");
}
args.MemoryList = new List <Entity>();
dbTable.QueryList(dba, args);
this.LoadByFilter(args);
#endregion
}
else
{
if (args.FetchType == FetchType.Count)
{
#region 查询 Count
var count = dbTable.Count(dba, args.Query);
entityList.SetTotalCount(count);
#endregion
}
else
{
//是否需要为 PagingInfo 设置统计值。
var pi = args.PagingInfo;
var pagingInfoCount = !PagingInfo.IsNullOrEmpty(pi) && pi.IsNeedCount;
//如果 pagingInfoCount 为真，则在访问数据库时，会设置好 PagingInfo 的总行数。
dbTable.QueryList(dba, args);
//最后，还需要设置列表的 TotalCount。
if (pagingInfoCount)
{
entityList.SetTotalCount(pi.TotalCount);
}
}
}
}
}
private EntityList DA_GetWithTasks(int userId)
{
var q = this.CreateLinqQuery();
q = q.Where(e => e.Id == userId);
var args = new EntityQueryArgs
{
Query = this.ConvertToQuery(q),
};
args.EagerLoad(TestUser.TestTreeTaskListProperty);
return(this.QueryList(args));
}
public virtual BookList GetWithEager2()
{
var args = new EntityQueryArgs
{
Query = QueryFactory.Instance.Query(this)
};
args.EagerLoad(Book.ChapterListProperty);
args.EagerLoad(Chapter.SectionListProperty);
args.EagerLoad(Section.SectionOwnerProperty);
return((BookList)this.QueryData(args));
}
private EntityList DA_GetWithEager2()
{
var args = new EntityQueryArgs
{
Query = QueryFactory.Instance.Query(this)
};
args.EagerLoad(Book.ChapterListProperty);
args.EagerLoad(Chapter.SectionListProperty);
args.EagerLoad(Section.SectionOwnerProperty);
return(this.QueryList(args));
}
public virtual TestUser GetWithTasks(int userId)
{
var q = this.CreateLinqQuery();
q = q.Where(e => e.Id == userId);
var args = new EntityQueryArgs
{
Query = this.ConvertToQuery(q),
};
args.EagerLoad(TestUser.TestTreeTaskListProperty);
return((TestUser)this.QueryData(args));
}
/// <summary>
/// Selects all.
/// </summary>
/// <param name="queryArgs">The query parameter.</param>
/// <returns></returns>
/// <exception cref="DatabaseException"></exception>
public virtual List <T> Select(EntityQueryArgs <T> queryArgs)
{
var funcName = "Select";
Logger.DebugFormat("{0}...", funcName);
List <T> result;
try
{
result = this.GetRecords(queryArgs);
}
catch (Exception ex)
{
Logger.ErrorFormat("{0} - Exception: {1}", funcName, ex.ToString());
throw new DatabaseException((int)DatabaseErrorCode.Load, ex);
}
Logger.DebugFormat("{0}...DONE", funcName);
return(result);
}
/// <summary>
/// Gets the records.
/// </summary>
/// <param name="queryArgs">The parameters.</param>
/// <returns></returns>
protected virtual List <T> GetRecords(EntityQueryArgs <T> queryArgs)
{
lock (syncLock)
{
var funcName = "GetRecords";
Logger.DebugFormat("{0}...", funcName);
Logger.DebugFormat("{0} - Input parameters: {1}", funcName, queryArgs.ToString());
List <T> result;
// Trace SQL generated by the entity framework
this.dbContext.Database.Log = s => Logger.Debug(Environment.NewLine + "\t" + s);
// Build query to select records (maybe by foreign key)
var records = (queryArgs.FilterExpr != null ? dbSet.Where(queryArgs.FilterExpr) : dbSet);
// Execute query to count total records (maybe by foreign key) from database
this.TotalRecords = records.Count();
// User already sort
if (queryArgs.OrderByExpr != null)
{
// Append order by expression into built query
records = queryArgs.SortDirection.Equals("asc")
? records.OrderBy(queryArgs.OrderByExpr)
: records.OrderByDescending(queryArgs.OrderByExpr);
}
// Append includes queryable to join reference tables into built query
records = queryArgs.IncludeQueryableFunc == null
? this.BuildIncludesQueryable(records)
: queryArgs.IncludeQueryableFunc.Invoke(records);
// Execute built query to select records from database
result = records.Skip(queryArgs.StartRecordIndex).Take(queryArgs.NumRecordsPerPage).ToList();
Logger.DebugFormat("{0}...DONE", funcName);
return(result);
}
}
/// <summary>
/// 子类重写此方法，查询从持久层加载列表的具体实现。
/// </summary>
/// <param name="args">The arguments.</param>
/// <param name="entityList">The entity list.</param>
/// <exception cref="System.NotSupportedException">使用内存过滤器的同时，不支持提供分页参数。</exception>
protected override void QueryListCore(EntityQueryArgs args, EntityList entityList)
{
var dp = RdbDataProvider.Get(this.Repo);
using (var dba = dp.CreateDbAccesser())
{
//以下代码，开始访问数据库查询数据。
var dbTable = dp.DbTable;
if (args.Filter != null)
{
#region 内存过滤式加载
if (!PagingInfo.IsNullOrEmpty(args.PagingInfo)) { throw new NotSupportedException("使用内存过滤器的同时，不支持提供分页参数。"); }
args.MemoryList = new List<Entity>();
dbTable.QueryList(dba, args);
this.LoadByFilter(args);
#endregion
}
else
{
if (args.FetchType == FetchType.Count)
{
#region 查询 Count
var count = dbTable.Count(dba, args.Query);
entityList.SetTotalCount(count);
#endregion
}
else
{
//是否需要为 PagingInfo 设置统计值。
var pi = args.PagingInfo;
var pagingInfoCount = !PagingInfo.IsNullOrEmpty(pi) && pi.IsNeedCount;
//如果 pagingInfoCount 为真，则在访问数据库时，会设置好 PagingInfo 的总行数。
dbTable.QueryList(dba, args);
//最后，还需要设置列表的 TotalCount。
if (pagingInfoCount) { entityList.SetTotalCount(pi.TotalCount); }
}
}
}
}
