public static SpecialLinqCommand CreateSelectByKeyForListPropertyManyToMany(EntitySession session,
ChildEntityListInfo listInfo, object[] keyValues)
{
Util.Check(listInfo.RelationType == EntityRelationType.ManyToMany, "Fatal: expected many-to-many list.");
var fromKey = listInfo.ParentRefMember.ReferenceInfo.FromKey;
listInfo.SqlCacheKey_SelectChildRecs = listInfo.SqlCacheKey_SelectChildRecs ??
SqlCacheKeyBuilder.BuildSpecialSelectKey(Tag_SelectByKeyListPropertyManyToMany, fromKey.Entity.Name, fromKey.Name, LockType.None, null);
return(new SpecialLinqCommand(session, listInfo.SqlCacheKey_SelectChildRecs,
listInfo, listInfo.OrderBy, keyValues, Setup_SelectManyToMany));
}
// constructor for many-to-many select
public SpecialLinqCommand(EntitySession session, string sqlCacheKey,
ChildEntityListInfo listInfoManyToMany, List <EntityKeyMemberInfo> orderBy,
object[] paramValues, Action <SpecialLinqCommand> setupAction)
: base(session, LinqCommandKind.Special, LinqOperation.Select)
{
this.SqlCacheKey = sqlCacheKey;
ListInfoManyToMany = listInfoManyToMany;
OrderBy = orderBy;
ParamValues = paramValues;
SetupAction = setupAction;
base.LockType = LockType.None;
}
public EntityCommand BuildSelectTargetListManyToManyCommand(ChildEntityListInfo listInfo)
{
//for many to many, create command selecting real entities
var targetEnt = listInfo.TargetEntity;
var parentEnt = listInfo.ParentRefMember.Entity;
var parentRefKey = listInfo.ParentRefMember.ReferenceInfo.FromKey; //FK from link entity to parent entity
var cmdName = targetEnt.Name + "_SelectBy_" + listInfo.LinkEntity.Name + "_" + listInfo.ParentRefMember.MemberName;
var cmd = AddCommand(cmdName, "Selects entities by many-to-many link.", EntityCommandKind.SelectByKeyManyToMany, targetEnt, parentRefKey);
cmd.SelectKeySecondary = listInfo.OtherEntityRefMember.ReferenceInfo.FromKey;
AddParametersFromKey(cmd, cmd.SelectKey);
return(cmd);
}
public static SpecialLinqCommand CreateSelectByKeyArrayForListPropertyManyToOne(EntitySession session,
ChildEntityListInfo listInfo, IList keyValues)
{
Util.Check(listInfo.RelationType == EntityRelationType.ManyToOne, "Fatal: expected many-to-one list.");
var fromKey = listInfo.ParentRefMember.ReferenceInfo.FromKey;
listInfo.SqlCacheKey_SelectChildRecsForInclude = listInfo.SqlCacheKey_SelectChildRecsForInclude ??
SqlCacheKeyBuilder.BuildSpecialSelectKey(Tag_SelectByKeyArrayListPropertyManyToOne, fromKey.Entity.Name, fromKey.Name, LockType.None, null);
// it is simply select-by-key-array command
var orderBy = fromKey.ExpandedKeyMembers.Merge(listInfo.OrderBy);
var paramValues = new object[] { keyValues };
return(new SpecialLinqCommand(session, listInfo.SqlCacheKey_SelectChildRecsForInclude,
fromKey, LockType.None, orderBy, paramValues, Setup_SelectByKeyValueArray));
}
public EntityCommand BuildSelectTargetListManyToManyCommand(ChildEntityListInfo listInfo)
{
//for many to many, create command selecting real entities
var targetEnt = listInfo.TargetEntity;
var parentEnt = listInfo.ParentRefMember.Entity;
var parentRefKey = listInfo.ParentRefMember.ReferenceInfo.FromKey; //FK from link entity to parent entity
var cmdName = targetEnt.Name + "_SelectBy_" + listInfo.LinkEntity.Name + "_" + listInfo.ParentRefMember.MemberName;
var cmd = AddCommand(cmdName, "Selects entities by many-to-many link.", EntityCommandKind.SelectByKeyManyToMany, targetEnt, parentRefKey);
cmd.SelectKeySecondary = listInfo.OtherEntityRefMember.ReferenceInfo.FromKey;
AddParametersFromKey(cmd, cmd.SelectKey);
return cmd;
}
