/// <summary>
/// 使用主键和外键对应构造一对多的关系。
/// </summary>
/// <param name="thisType"></param>
/// <param name="otherType"></param>
/// <returns></returns>
private static RelationshipMetadata MakeOne2ManyMetadata(Type thisType, Type otherType)
{
var pks = PropertyUnity.GetPrimaryProperties(thisType).ToList();
if (pks.Count > 0)
{
var fks = pks.Select(s => PropertyUnity.GetProperty(otherType, s.Name)).ToList();
var keys = new RelationshipKey[pks.Count];
for (var i = 0; i < pks.Count; i++)
{
if (fks[i] == null)
{
throw new Exception();
}
keys[i] = new RelationshipKey {
ThisKey = pks[i].Name, ThisProperty = pks[i], OtherKey = fks[i].Name, OtherProperty = fks[i]
};
}
return(new RelationshipMetadata(thisType, otherType, RelationshipStyle.One2Many, keys));
}
return(null);
}
/// <summary>
/// 使用主键和外键对应构造一对多的关系。
/// </summary>
/// <param name="relProperty"></param>
/// <param name="thisType"></param>
/// <param name="otherType"></param>
/// <returns></returns>
private static RelationshipMetadata MakeRelationshipMetadata(RelationProperty relProperty, Type thisType, Type otherType)
{
//是否使用了 ForeignKeyAttribute 来指定对应的外键
var assignAttr = relProperty.Info.ReflectionInfo.GetCustomAttributes <RelationshipAssignAttribute>().FirstOrDefault();
if (assignAttr != null)
{
var fkPro = PropertyUnity.GetProperty(otherType, assignAttr.ForeignKey);
var pkPro = PropertyUnity.GetProperty(thisType, assignAttr.PrimaryKey);
if (fkPro != null && pkPro != null)
{
var key = new RelationshipKey {
ThisKey = pkPro.Name, ThisProperty = pkPro, OtherKey = fkPro.Name, OtherProperty = fkPro
};
return(new RelationshipMetadata(thisType, otherType, RelationshipStyle.One2Many, RelationshipSource.AutomaticallyAssign, new[] { key }));
}
}
//使用名称相同的主键进行匹配
var pks = PropertyUnity.GetPrimaryProperties(thisType).ToList();
if (pks.Count > 0)
{
var fks = pks.Select(s => PropertyUnity.GetProperty(otherType, s.Name)).ToList();
var keys = new RelationshipKey[pks.Count];
for (var i = 0; i < pks.Count; i++)
{
if (fks[i] == null)
{
throw new Exception();
}
keys[i] = new RelationshipKey {
ThisKey = pks[i].Name, ThisProperty = pks[i], OtherKey = fks[i].Name, OtherProperty = fks[i]
};
}
return(new RelationshipMetadata(thisType, otherType, RelationshipStyle.One2Many, RelationshipSource.AutomaticallyAssign, keys));
}
return(null);
}