Struct Cursor 

pub struct Cursor {
    pub column: String,
    pub value: CursorValue,
    pub direction: CursorDirection,
}

Cursor for cursor-based pagination.

Fields

column: String

The column to use for cursor.

value: CursorValue

The cursor value.

direction: CursorDirection

Direction of pagination.

Implementations

impl Cursor

pub fn new( column: impl Into<String>, value: CursorValue, direction: CursorDirection, ) -> Self

Create a new cursor.

pub fn after(column: impl Into<String>, value: impl Into<CursorValue>) -> Self

Create a cursor for fetching records after this value.

pub fn before(column: impl Into<String>, value: impl Into<CursorValue>) -> Self

Create a cursor for fetching records before this value.

pub fn to_sql_condition(&self) -> String

Generate the WHERE clause for cursor-based pagination.

Optimized to write directly to a pre-sized buffer.

pub fn write_sql_condition(&self, buffer: &mut String)

Write the cursor condition directly to a buffer (zero allocation).

pub const fn operator(&self) -> &'static str

Get the operator for this cursor direction.

Trait Implementations

impl Clone for Cursor

fn clone(&self) -> Cursor

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Cursor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Cursor

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Cursor

fn eq(&self, other: &Cursor) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Cursor

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Cursor

impl StructuralPartialEq for Cursor