Get Database Table Name from Entity Framework MetaData

.net database-metadata entity-framework

Question

I'm trying to figure out a way to get the underlying SQL table name for a given entity type. I've experimented around with the MetadataWorkspace queries and while I can get lots of information from the object or the storage space, I can't seem to figure out how to map between the two.

So say I have a type in the object model called Lookup - how do I find the tablename (wws_lookups) in the database?

I can query all the EntityType objects for CSpace and SSpace and I can see both listed correctly but I can't figure out how to get SSpace from CSpace.

Is there any way to do this?

Popular Answer

I use Nigel's approach (extracting table name from .ToTraceString()) but with some modifications, because his code won't work if the table is not in the default SQL Server schema (dbo.{table-name}).

I've created extension methods for DbContext and ObjectContext objects:

public static class ContextExtensions
{
    public static string GetTableName<T>(this DbContext context) where T : class
    {
        ObjectContext objectContext = ((IObjectContextAdapter) context).ObjectContext;

        return objectContext.GetTableName<T>();
    }

    public static string GetTableName<T>(this ObjectContext context) where T : class
    {
        string sql = context.CreateObjectSet<T>().ToTraceString();
        Regex regex = new Regex(@"FROM\s+(?<table>.+)\s+AS");
        Match match = regex.Match(sql);

        string table = match.Groups["table"].Value;
        return table;
    }
}

More details here:
Entity Framework: Get mapped table name from an entity



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