Subsonic 3 Sql Join using SimpleRepository can't join on columns with same name?
I'm trying to using the Subsonic Fluent query interface to create a simple inner join between two tables:
[SearchJobResults]
PK SearchJobResultId int
Name string Desc string[ParseResults]
PK ParseResultId int
Name string SearchJobResultId intThere is a 1 to 1 relationship between these tables.
Keep in mind, I'm not using ActiveRecord. I have classes for ParseResult and SearchJobResult that work fine.
IDataProvider p = P开发者_开发知识库roviderFactory.GetProvider("DemacDB");
SqlQuery query = new SqlQuery(p);
var q = new Select(p).From("ParseResults")
.InnerJoin<SearchJobResult>("SearchJobResultId","SearchJobResultId").GetRecordCount();
This code throws an exception:
Test method Models.SearchTests.TestSubsonicQueryMethods threw exception: System.InvalidOperationException: Don't know which column to join to - can't find column SearchJobResultId in table ParseResults.
I've looked at the source code for SubSonic to see where this execption is coming from:
private void CreateJoin<T>(string fromColumnName, string toColumnName, Join.JoinType type)
{
//see if we can find the table
var toTable = _provider.FindOrCreateTable(typeof(T));
//the assumption here is that the FromTable[0] is the table to join from
if(FromTables.Count == 0)
throw new InvalidOperationException("Can't join if there's no table to join to - make sure to use From() before InnerJoin");
if(toTable == null)
throw new InvalidOperationException("Can't find the table for this type. Try using the Column instead");
var fromColumn = FromTables[0].GetColumn(fromColumnName);
if(fromColumn == null)
throw new InvalidOperationException("Don't know which column to join to - can't find column " + fromColumnName + " in table " + FromTables[0].Name);
var toColumn = toTable.GetColumn(toColumnName);
if(toColumn == null)
throw new InvalidOperationException("Don't know which column to join to - can't find column " + toColumnName + " in table " + toTable.Name);
CreateJoin(fromColumn, toColumn, Join.JoinType.Inner);
}
I've tried using Aliases but that fails. Additionally, if I just do a simple query like this it works fine:
var d = new Select(p).From("ParseResults").GetRecordCount();
Turns out you need to use the Typed T overloads of From/Join to get this working.
var b = new Select(p).From<ParseResult>().InnerJoin<SearchJobResult>("SearchJobResultId", "SearchJobResultId").GetRecordCount();
Works as the FromTables collection in Subsonic now correctly gets enumerated because it's reading the type from the actual object and not the DB.
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