public IEnumerable <TProjection> Query <TBase, TProjection>(IDbConnection connection, IDbTransaction transaction, ProjectedSelectQuery <TBase, TProjection> query)
where TBase : class, new()
{
var sqlResult = this.selectWriter.GenerateSql(query);
if (sqlResult.FetchTree.Children.Count == 0)
{
return(connection.Query <TBase>(sqlResult.Sql, sqlResult.Parameters, transaction)
.Select(query.ProjectionExpression.Compile()));
}
var projectionExpressionRewriter = new ProjectionExpressionRewriter <TBase, TProjection>(this.configuration, query, sqlResult.FetchTree);
var projectionDelegateResult = projectionExpressionRewriter.Rewrite();
return(connection.Query <TProjection>(sqlResult.Sql, projectionDelegateResult.Types, projectionDelegateResult.Mapper, sqlResult.Parameters, transaction, splitOn: sqlResult.FetchTree.SplitOn));
}
private void AssertMapperMatches <TBase, TProjection>(object[] inputs, Type[] types, IProjectedSelectQuery <TBase, TProjection> projectedSelectQuery, params Action <TProjection>[] assertions)
where TBase : class, new()
{
var selectWriter = this.GetSql2012Writer();
var concreteQuery = (ProjectedSelectQuery <TBase, TProjection>)projectedSelectQuery;
var sqlResult = selectWriter.GenerateSql(concreteQuery);
var projectionRewriter = new ProjectionExpressionRewriter <TBase, TProjection>(selectWriter.Configuration, concreteQuery, sqlResult.FetchTree);
var result = projectionRewriter.Rewrite();
Assert.Equal(types, result.Types);
var projection = result.Mapper(inputs);
foreach (var assertion in assertions)
{
assertion(projection);
}
}
