private static DbRelationOperateBase AddRelation <TSource, TTarget>(this DbSet <TSource> dataSet, TSource source, LambdaExpression expression, TTarget target)
where TSource : class
where TTarget : class
{
var propertyInfo = expression.GetMember();
var configure = dataSet.Context.Configuration;
var table = configure.Metadata.Table(typeof(TSource));
var navigate = table.Navigates[propertyInfo];
DbObjectsOperateBase dependentInsert = null;
DbObjectsOperateBase dependentInsert2 = null;
var executor = dataSet.Context.Executor;
if (!navigate.IsComposite)
{
DbObjectsOperateBase currentInsert = null;
if (navigate.IsForeign == true)
{
currentInsert = GetInsertOperate <TSource>(source, executor);
dependentInsert = GetInsertOperate <TTarget>(target, executor);
}
else
{
currentInsert = GetInsertOperate <TTarget>(target, executor);
dependentInsert = GetInsertOperate <TSource>(source, executor);
}
if (currentInsert != null)
{
var reference = (IInsertReferenceRelation)currentInsert;
var relation = reference.Relations.FirstOrDefault(a => a.Navigate == navigate);
if (relation == null)
{
relation = new DbAddRelationOperate <TSource>(dataSet.Context, propertyInfo, typeof(TSource), table, navigate);
reference.Relations.Add(relation);
}
relation.Add(source, target);
if (dependentInsert != null)
{
currentInsert.Dependents.Add(dependentInsert);
}
return(relation);
}
}
else
{
dependentInsert = GetInsertOperate <TSource>(source, executor);
dependentInsert2 = GetInsertOperate <TTarget>(target, executor);
}
var result = GetOrCreate(dataSet, propertyInfo, new DbRelationItem(source, target)
, (context, property) => new DbAddRelationOperate <TSource>(context, propertyInfo, typeof(TSource), table, navigate));
if (dependentInsert != null)
{
result.Dependents.Add(dependentInsert);
}
if (dependentInsert2 != null)
{
result.Dependents.Add(dependentInsert2);
}
return(result);
}
/// <summary>
/// 创建数据对象。
/// </summary>
/// <param name="context">生成上下文。</param>
/// <param name="operate">当前操作对象。</param>
internal GenerateDataForCommit(GenerateContext context, DbObjectsOperateBase operate)
: base(context, operate)
{
if (operate is IConcurrencyCheckOperate concur)
{
NeedConcurrencyCheck = concur.NeedCheck;
}
Table = context.Metadata.Table(operate.ClrType);
TableCount = Table.InheritSets.Length + 1;
Items = operate;
Loader = CreateLoader(context, Table);
CommitObject = new CommitObjectFragment(context, Loader);
}
/// <summary>
/// 创建提交内容对象。
/// </summary>
/// <param name="context"></param>
/// <param name="operate"></param>
internal ContentBase(GenerateContext context, DbObjectsOperateBase operate)
: base(context, operate)
{
if (operate is IConcurrencyCheckOperate concur)
{
NeedConcurrencyCheck = concur.NeedCheck;
}
Table = context.Metadata.Table(operate.ClrType);
Items = operate;
Items = operate;
Loader = CreateLoader(context, Table);
CommitObject = new CommitObjectFragment(context, Loader);
}
/// <summary>
/// 创建提交单元。
/// </summary>
/// <param name="context">生成上下文。</param>
/// <param name="operate">操作对象。</param>
internal InheritContentUnitBase(GenerateContext context, DbObjectsOperateBase operate)
: base(context, operate)
{
}
/// <summary>
/// 创建内容对象。
/// </summary>
/// <param name="context">生成上下文。</param>
/// <param name="operate">操作对象。</param>
internal UpdateContent(GenerateContext context, DbObjectsOperateBase operate)
: base(context, operate)
{
}
/// <summary>
/// 创建数据对象。
/// </summary>
/// <param name="context">生成上下文。</param>
/// <param name="operate">当前操作对象。</param>
internal GenerateDataForUpdate(GenerateContext context, DbObjectsOperateBase operate)
: base(context, operate)
{
}
/// <summary>
/// 创建内容对象。
/// </summary>
/// <param name="context">生成上下文。</param>
/// <param name="operate">操作对象。</param>
internal InheritDeleteContent(GenerateContext context, DbObjectsOperateBase operate)
: base(context, operate)
{
Array.Reverse(Tables);
}
/// <summary>
/// 创建内容对象。
/// </summary>
/// <param name="context">生成上下文。</param>
/// <param name="operate">操作对象。</param>
internal InheritInsertContent(GenerateContext context, DbObjectsOperateBase operate)
: base(context, operate)
{
}
