private void SetDuplicateCheckExpression(PutItemRequest request, Dictionary <string, AttributeValue> item)
{
ExpressionAttributeNames.Clear();
ExpressionAttributeValues.Clear();
AttributeGenerator.ResetIndex();
var hashKeyAttrValue = item.FirstOrDefault(x => x.Key == _hashKeyName).Value;
if (hashKeyAttrValue == null)
{
throw new InvalidOperationException($"Item does not contains Hash key: {_hashKeyName}");
}
var sb = new StringBuilder();
var hashKeyName = GetAttributeName(_hashKeyName);
var hashKeyValue = GetAttributeValue(hashKeyAttrValue);
sb.Append($"{hashKeyName} <> {hashKeyValue}");
if (!string.IsNullOrEmpty(_sortKeyName))
{
var sortKeyAttrValue = item.FirstOrDefault(x => x.Key == _sortKeyName).Value;
var sortKeyName = GetAttributeName(_sortKeyName);
var sortKeyValue = GetAttributeValue(sortKeyAttrValue);
sb.Append($" AND {sortKeyName} <> {sortKeyValue}");
}
request.ExpressionAttributeNames = ExpressionAttributeNames;
request.ExpressionAttributeValues = ExpressionAttributeValues;
request.ConditionExpression = sb.ToString();
}
protected override ScanRequest GetRequest()
{
var request = new ScanRequest()
{
TableName = TableName,
ExpressionAttributeNames = ExpressionAttributeNames.ToDictionary(kv => kv.Key, kv => kv.Value),
ExpressionAttributeValues = ExpressionAttributeValues.ToDictionary(kv => kv.Key, kv => kv.Value),
FilterExpression = string.IsNullOrWhiteSpace(FilterExpression) ? null : FilterExpression.Trim(),
ExclusiveStartKey = ExclusiveStartKey,
};
if (!string.IsNullOrEmpty(IndexName))
{
request.IndexName = IndexName;
}
return(request);
}
protected override QueryRequest GetRequest()
{
var request = new QueryRequest
{
TableName = TableName,
ExpressionAttributeNames = ExpressionAttributeNames.ToDictionary(kv => kv.Key, kv => kv.Value),
ExpressionAttributeValues = ExpressionAttributeValues.ToDictionary(kv => kv.Key, kv => kv.Value),
ScanIndexForward = !QueryInfo.OrderDescend,
FilterExpression = string.IsNullOrWhiteSpace(FilterExpression) ? null : FilterExpression.Trim(),
KeyConditionExpression = HashKey + (SortKey != null ? " AND " + SortKey : string.Empty),
ExclusiveStartKey = ExclusiveStartKey,
};
if (!string.IsNullOrEmpty(IndexName))
{
request.IndexName = IndexName;
}
return(request);
}
