Enum PostgresInsertValue 

pub enum PostgresInsertValue<'a, V: SQLParam, T> {
    Omit,
    Null,
    Value(ValueWrapper<'a, V, T>),
}

One column of a row in an INSERT: omitted, NULL, or a value or SQL expression.

Generated Insert* models store their fields as this type. T is the column’s Rust type, used to check what can be assigned. Converting an Option maps None to Omit, not to NULL.

Variants

Omit

Leave the column out, so the database default applies.

Null

Insert NULL.

Value(ValueWrapper<'a, V, T>)

Insert a bound value, placeholder or SQL expression.

Implementations

impl<'a, T> PostgresInsertValue<'a, PostgresValue<'a>, T>

pub fn into_owned( self, ) -> PostgresInsertValue<'static, PostgresValue<'static>, T>

Converts to a 'static value that owns all its data.

The whole SQL fragment is kept: placeholders stay unbound and expressions keep their shape, with every bound value detached from its borrow.

Trait Implementations

impl<'a, V: Clone + SQLParam, T: Clone> Clone for PostgresInsertValue<'a, V, T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, V: Debug + SQLParam, T: Debug> Debug for PostgresInsertValue<'a, V, T>

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

Formats the value using the given formatter.

impl<'a, V: SQLParam, T> Default for PostgresInsertValue<'a, V, T>

fn default() -> Self

Returns the “default value” for a type.

impl<'a> From<&str> for PostgresInsertValue<'a, PostgresValue<'a>, String>

fn from(value: &str) -> Self

Converts to this type from the input type.

impl<'a, T> From<Option<T>> for PostgresInsertValue<'a, PostgresValue<'a>, T>

where T: ToSQL<'a, PostgresValue<'a>>,

fn from(value: Option<T>) -> Self

Converts to this type from the input type.

impl<'a, T> From<Placeholder> for PostgresInsertValue<'a, PostgresValue<'a>, T>

fn from(placeholder: Placeholder) -> Self

Converts to this type from the input type.

impl<'a, T> From<T> for PostgresInsertValue<'a, PostgresValue<'a>, T>

where T: TryInto<PostgresValue<'a>>,

Converts any value that converts to a PostgresValue (enums, ArrayString, ArrayVec, …).

Panics

Panics when the value fails to convert (a JSON payload that fails to serialize, for example), rather than storing NULL in its place.

fn from(value: T) -> Self

Converts to this type from the input type.

impl<'a, M: DataType, N: Nullability, T> From<TypedPlaceholder<M, N>> for PostgresInsertValue<'a, PostgresValue<'a>, T>

fn from(typed: TypedPlaceholder<M, N>) -> Self

Converts to this type from the input type.