public ISqlFragment Parse(IFieldMapping mapping, ISerializer serializer, MethodCallExpression expression)
{
var field = GetField(mapping, expression);
var locator = field.TypedLocator;
ConstantExpression value;
if (expression.Object?.NodeType == ExpressionType.Constant)
{
value = (ConstantExpression)expression.Object;
}
else
{
value = expression.Arguments.OfType <ConstantExpression>().FirstOrDefault();
}
if (value == null)
{
throw new BadLinqExpressionException("Could not extract value from {0}.".ToFormat(expression), null);
}
object valueToQuery = value.Value;
if (valueToQuery == null)
{
return(new WhereFragment($"({field.RawLocator}) {_isOperator} null"));
}
if (valueToQuery.GetType() != expression.Method.DeclaringType)
{
try
{
valueToQuery = Convert.ChangeType(value.Value, expression.Method.DeclaringType);
}
catch (Exception e)
{
throw new BadLinqExpressionException(
$"Could not convert {value.Value.GetType().FullName} to {expression.Method.DeclaringType}", e);
}
}
if (_supportContainment && ((mapping.PropertySearching == PropertySearching.ContainmentOperator ||
field.ShouldUseContainmentOperator())))
{
var dict = new Dictionary <string, object>();
ContainmentWhereFragment.CreateDictionaryForSearch(dict, expression, valueToQuery, serializer);
return(new ContainmentWhereFragment(serializer, dict));
}
return(new WhereFragment($"{locator} {_equalsOperator} ?", valueToQuery));
}
public IWhereFragment Parse(IQueryableDocument mapping, ISerializer serializer, MethodCallExpression expression)
{
var value = expression.Arguments.Single().Value();
return(ContainmentWhereFragment.SimpleArrayContains(FindMembers.Determine(expression.Object), serializer, expression.Object, value));
}
