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POLINQ, entity that implements Interface and exception in mapping
 

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    <p>I'm using repository pattern with LINQ, have IRepository.DeleteOnSubmit(T Entity). It works fine, but when my entity class has interface, like this: </p> <pre><code>public interface IEntity { int ID {get;set;} } public partial class MyEntity: IEntity { public int ID { get { return this.IDfield; } set { this.IDfield=value; } } } </code></pre> <p>and then trying to delete some entity like this: </p> <pre><code>IEntity ie=repository.GetByID(1); repoitory.DeleteOnSubmit(ie); </code></pre> <p>throws<br> The member 'IEntity.ID' has no supported translation to SQL. </p> <p>fetching data from DB works, but delete and insert doesn't. How to use interface against DataContext?</p> <hr> <p>Here it is:<br> Exception message: The member 'MMRI.DAL.ITag.idContent' has no supported translation to SQL. </p> <p>Code: </p> <pre><code>var d = repContent.GetAll().Where(x =&gt; x.idContent.Equals(idContent)); foreach (var tagConnect in d) &lt;- error line { repContet.DeleteOnSubmit(tagConnect); </code></pre> <p>(it gets all tags from DB, and deletes them)</p> <p>And stack trace: </p> <pre><code>[NotSupportedException: The member 'MMRI.DAL.ITag.idContent' has no supported translation to SQL.] System.Data.Linq.SqlClient.Visitor.VisitMember(SqlMember m) +621763 System.Data.Linq.SqlClient.SqlVisitor.Visit(SqlNode node) +541 System.Data.Linq.SqlClient.SqlVisitor.VisitExpression(SqlExpression exp) +8 System.Data.Linq.SqlClient.SqlVisitor.VisitBinaryOperator(SqlBinary bo) +18 System.Data.Linq.SqlClient.Visitor.VisitBinaryOperator(SqlBinary bo) +18 System.Data.Linq.SqlClient.SqlVisitor.Visit(SqlNode node) +196 System.Data.Linq.SqlClient.SqlVisitor.VisitExpression(SqlExpression exp) +8 System.Data.Linq.SqlClient.SqlVisitor.VisitSelectCore(SqlSelect select) +46 System.Data.Linq.SqlClient.Visitor.VisitSelect(SqlSelect select) +20 System.Data.Linq.SqlClient.SqlVisitor.Visit(SqlNode node) +1024 System.Data.Linq.SqlClient.SqlProvider.BuildQuery( ... </code></pre> <p>When I try do decorate partial class:</p> <pre><code>[Column(Storage = "_idEvent", DbType = "Int NOT NULL", IsPrimaryKey = true)] public int idContent { get { return this.idEvent; } set { this.idEvent=value; } } </code></pre> <p>it throws error "Invalid column name 'idContent'."</p>
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    1. COStack overflow is not a forum. Some of the stuff you (and others) posted as "Answer" to the question should actually be "comments". You can also edit the original question and any answer.
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