Struct kanidm::filter::Filter[][src]

pub struct Filter<STATE> { /* fields omitted */ }
Expand description

A Filter is a logical set of assertions about the state of an Entry and it’s avas. Filters are built from a set of possible assertions.

  • Presence. An ava of that attribute’s name exists, with any value on the Entry.
  • Equality. An ava of the attribute exists and contains this matching value.
  • Substring. An ava of the attribute exists and has a substring containing the requested value.
  • Or. Contains multiple filters and asserts at least one is true.
  • And. Contains multiple filters and asserts all of them are true.
  • AndNot. This is different to a “logical not” operation. This asserts that a condition is not true in the current candidate set. A search of AndNot alone will yield not results, but an AndNot in an And query will assert that a condition can not hold.

Filters for security reasons are validated by the schema to assert all requested attributes are valid and exist in the schema so that they can have their indexes correctly used. This avoids a denial of service attack that may lead to full-table scans.

This Filter validation state is in the STATE attribute and will be either FilterInvalid or FilterValid. The Filter must be checked by the schema to move to FilterValid. This helps to prevent errors at compile time to assert Filters are secuerly. checked

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