Trait Column 

pub trait Column: Debug + Send {
    // Required methods
    fn get(&self, index: usize) -> RealmResult<Value>;
    fn is_null(&self, index: usize) -> RealmResult<bool>;
    fn count(&self) -> RealmResult<usize>;
    fn nullable(&self) -> bool;
    fn is_indexed(&self) -> bool;
    fn get_row_number_by_index(
        &self,
        lookup_value: &Value,
    ) -> RealmResult<Option<usize>>;
    fn name(&self) -> Option<&str>;
}

A column for a table.

Required Methods

fn get(&self, index: usize) -> RealmResult<Value>

Get the value for this column for the row with the given index.

fn is_null(&self, index: usize) -> RealmResult<bool>

Check whether the value at the given index is null. Note that some column types are never null, see Value for details.

fn count(&self) -> RealmResult<usize>

Get the total number of values in this column.

fn nullable(&self) -> bool

Get whether this column is nullable. Note that some column types are never null, see Value for details.

fn is_indexed(&self) -> bool

Is this column indexed? If so, you can use table.find_row_from_indexed_column to find rows by a known value based on this column.

fn get_row_number_by_index( &self, lookup_value: &Value, ) -> RealmResult<Option<usize>>

Look up a value for this column in the index.

Panics if this column is not indexed.

fn name(&self) -> Option<&str>

Get the name of this column. All columns except backlinks are named.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors