ILiteCollectionTEnsureIndexK(String, ExpressionFuncT, K, Boolean) Method

Create a new permanent index in all documents inside this collections if index not exists already.

Namespace: Internal.LiteDB
Assembly: NeoAxis.Core (in NeoAxis.Core.dll) Version: 2026.1.1.0 (2026.1.1.0)

Syntax

bool EnsureIndex<K>(
	string name,
	Expression<Func<T, K>> keySelector,
	bool unique = false
)

name String: Index name - unique name for this collection
keySelector ExpressionFuncT, K: LinqExpression to be converted into BsonExpression to be indexed
unique Boolean (Optional): Create a unique keys index?