/// <summary>
/// Call this method to finalize defining the index after setting the index keys and options.
/// </summary>
/// <param name="cancellation">An optional cancellation token</param>
public async Task CreateAsync(CancellationToken cancellation = default)
{
if (Keys.Count == 0)
{
throw new ArgumentException("Please define keys before calling this method.");
}
var propNames = new HashSet <string>();
var keyDefs = new HashSet <IndexKeysDefinition <T> >();
var isTextIndex = false;
foreach (var key in Keys)
{
string keyType = string.Empty;
switch (key.Type)
{
case KeyType.Ascending:
keyDefs.Add(Builders <T> .IndexKeys.Ascending(key.PropertyName));
keyType = "(Asc)";
break;
case KeyType.Descending:
keyDefs.Add(Builders <T> .IndexKeys.Descending(key.PropertyName));
keyType = "(Dsc)";
break;
case KeyType.Geo2D:
keyDefs.Add(Builders <T> .IndexKeys.Geo2D(key.PropertyName));
keyType = "(G2d)";
break;
case KeyType.Geo2DSphere:
keyDefs.Add(Builders <T> .IndexKeys.Geo2DSphere(key.PropertyName));
keyType = "(Gsp)";
break;
case KeyType.GeoHaystack:
keyDefs.Add(Builders <T> .IndexKeys.GeoHaystack(key.PropertyName));
keyType = "(Ghs)";
break;
case KeyType.Hashed:
keyDefs.Add(Builders <T> .IndexKeys.Hashed(key.PropertyName));
keyType = "(Hsh)";
break;
case KeyType.Text:
keyDefs.Add(Builders <T> .IndexKeys.Text(key.PropertyName));
isTextIndex = true;
break;
case KeyType.Wildcard:
keyDefs.Add(Builders <T> .IndexKeys.Wildcard(key.PropertyName));
keyType = "(Wld)";
break;
}
propNames.Add(key.PropertyName + keyType);
}
if (string.IsNullOrEmpty(options.Name))
{
if (isTextIndex)
{
options.Name = "[TEXT]";
}
else
{
options.Name = string.Join(" | ", propNames);
}
}
var model = new CreateIndexModel <T>(
Builders <T> .IndexKeys.Combine(keyDefs),
options);
try
{
await DB.CreateIndexAsync(model, db, cancellation);
}
catch (MongoCommandException x)
{
if (x.Code == 85 || x.Code == 86)
{
await DB.DropIndexAsync <T>(options.Name, db, cancellation);
await DB.CreateIndexAsync(model, db, cancellation);
}
else
{
throw;
}
}
}
/// <summary>
/// Call this method to finalize defining the index after setting the index keys and options.
/// </summary>
async public Task CreateAsync()
{
if (Keys.Count == 0)
{
throw new ArgumentException("Please define keys before calling this method.");
}
var propNames = new HashSet <string>();
var keyDefs = new HashSet <IndexKeysDefinition <T> >();
var isTextIndex = false;
foreach (var key in Keys)
{
switch (key.Type)
{
case Type.Ascending:
keyDefs.Add(Builders <T> .IndexKeys.Ascending(key.Property));
break;
case Type.Descending:
keyDefs.Add(Builders <T> .IndexKeys.Descending(key.Property));
break;
case Type.Geo2D:
keyDefs.Add(Builders <T> .IndexKeys.Geo2D(key.Property));
break;
case Type.Geo2DSphere:
keyDefs.Add(Builders <T> .IndexKeys.Geo2DSphere(key.Property));
break;
case Type.GeoHaystack:
keyDefs.Add(Builders <T> .IndexKeys.GeoHaystack(key.Property));
break;
case Type.Hashed:
keyDefs.Add(Builders <T> .IndexKeys.Hashed(key.Property));
break;
case Type.Text:
keyDefs.Add(Builders <T> .IndexKeys.Text(key.Property));
isTextIndex = true;
break;
}
var member = key.Property.Body as MemberExpression;
if (member == null)
{
member = (key.Property.Body as UnaryExpression)?.Operand as MemberExpression;
}
if (member == null)
{
throw new ArgumentException("Unable to get property name");
}
propNames.Add(member.Member.Name);
}
if (string.IsNullOrEmpty(_options.Name))
{
_options.Name = DB.GetCollectionName <T>();
if (isTextIndex)
{
_options.Name = $"{_options.Name}[TEXT]";
}
else
{
_options.Name = $"{_options.Name}[{string.Join("-", propNames)}]";
}
}
var model = new CreateIndexModel <T>(
Builders <T> .IndexKeys.Combine(keyDefs),
_options.ToCreateIndexOptions());
try
{
await DB.CreateIndexAsync <T>(model);
}
catch (MongoCommandException x)
{
if (x.Code == 85 || x.Code == 86)
{
await DB.DropIndexAsync <T>(_options.Name);
await DB.CreateIndexAsync <T>(model);
}
else
{
throw x;
}
}
}
