public static string GetFieldLabel(this IDynamoCommonQuery q, string field)
{
if (!DynamoConfig.IsReservedWord(field))
{
return(field);
}
var alias = "#" + field.Substring(0, 2).ToUpper();
bool aliasExists = false;
foreach (var entry in q.ExpressionAttributeNames)
{
if (entry.Value == field)
{
return(entry.Key);
}
if (entry.Key == alias)
{
aliasExists = true;
}
}
if (aliasExists)
{
alias += q.ExpressionAttributeNames.Count;
}
q.ExpressionAttributeNames[alias] = field;
return(alias);
}
public string GetMemberName(string memberName)
{
if (DynamoConfig.IsReservedWord(memberName) && !visitingExpressionList)
{
var alias = "#" + memberName.Substring(0, 2).ToUpper();
bool aliasExists = false;
foreach (var entry in Aliases)
{
if (entry.Value == memberName)
{
return(entry.Key);
}
if (entry.Key == alias)
{
aliasExists = true;
}
}
if (aliasExists)
{
alias += Aliases.Count;
}
Aliases[alias] = memberName;
return(alias);
}
return(memberName);
}
