[英]Entity Framework Insert Many to many creates duplicated data
I have 3 Tables. 我有3张桌子。 Metadata, Rules, and a NxN relationship MetadataRules. 元数据,规则和NxN关系MetadataRules。
I'm inserting a Metadata, and my object contains a list of Rules that are retrieved from DB. 我正在插入元数据,我的对象包含从DB检索的规则列表。
myMetadata.Rules = myListOfrules;
When i perform an insert, all the rules in myListOfRules are duplicated in the Rules table, instead of just creating a relationship. 当我执行插入时,myListOfRules中的所有规则都在Rules表中重复,而不是仅创建关系。 I'm inserting it with: 我插入它:
public static void InserirTipoMetadata( TA_TIPO_METADATA tipoMetadata ) {
using ( EnterpriseContext context = new EnterpriseContext() ) {
context.TipoMetadata.AddObject(tipoMetadata);
context.SaveChanges(System.Data.Objects.SaveOptions.DetectChangesBeforeSave);
}
}
What should i do to not duplicate the Rules? 我该怎么做才不重复规则?
Thanks! 谢谢!
I found a solution, but I don't think it is the right one... 我找到了一个解决方案,但我不认为它是正确的...
public static void InserirTipoMetadata( TA_TIPO_METADATA tipoMetadata ) {
using ( EnterpriseContext context = new EnterpriseContext() ) {
List<TA_REGRA_VALID> regras = new List<TA_REGRA_VALID>();
foreach ( var v in tipoMetadata.TA_REGRA_VALID ) {
regras.Add(context.Regra.Single(p => p.CO_SEQ_REGRA == v.CO_SEQ_REGRA));
}
tipoMetadata.TA_REGRA_VALID = regras;
context.TipoMetadata.AddObject(tipoMetadata);
context.SaveChanges(System.Data.Objects.SaveOptions.DetectChangesBeforeSave);
}
}
I'm selecting the rules again from the DB before trying to add. 在尝试添加之前,我再次从数据库中选择规则。 Is that the correct way? 这是正确的方法吗?
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