protected override Expression VisitMember(MemberExpression m)
#endif
{
if (m.Expression != null && m.Expression.NodeType == ExpressionType.Parameter)
{
var fieldName = GetFieldName(m.Member);
sb.Append(_isNotEqual ? string.Format("-{0}", fieldName) : fieldName);
return(m);
}
if (m.Expression != null)
{
if (m.Expression.NodeType == ExpressionType.Constant)
{
var ce = (ConstantExpression)m.Expression;
sb.Append(ce.Value);
}
else if (m.Expression.NodeType == ExpressionType.MemberAccess)
{
var ce = (MemberExpression)m.Expression;
#if NET40 || NET35 || PORTABLE40
var joinAttr =
Attribute.GetCustomAttribute(ce.Member, typeof(LinqToSolrForeignKeyAttribute), true) as
LinqToSolrForeignKeyAttribute;
#else
var joinAttr = ce.Member.GetCustomAttribute <LinqToSolrForeignKeyAttribute>();
#endif
if (joinAttr != null)
{
var fieldName = GetFieldName(m.Member);
var topType = ce.Expression as ParameterExpression;
if (topType != null)
{
var joiner = new LinqToSolrJoiner(ce.Member.Name, topType.Type);
var joinstr = string.Format("!join from={0} to={1} fromIndex={2}", joiner.FieldKey, joiner.ForeignKey, _service.Configuration.GetIndex(joiner.PropertyRealType));
sb.Append("{" + joinstr + "}" + fieldName);
}
}
}
return(m);
}
throw new NotSupportedException(string.Format("The member '{0}' is not supported", m.Member.Name));
}
public static IQueryable <TSource> Include <TSource>(this IQueryable <TSource> enumerable, params string[] properties)
#endif
{
if (properties.Any())
{
var query = enumerable as LinqToSolrQueriable <TSource>;
if (query == null)
{
throw new ArgumentException("'Include' must be invoked as SolrQueryable extension");
}
var service = ((LinqToSolrProvider)query.Provider).Service;
service.CurrentQuery = service.CurrentQuery ?? new LinqToSolrQuery();
foreach (var prop in properties)
{
var joiner = new LinqToSolrJoiner(prop, typeof(TSource));
service.CurrentQuery.JoinFields.Add(joiner);
}
}
return(enumerable);
}
