Enum UpdateTarget 

pub enum UpdateTarget {
    Query(Box<Query>),
    Model(ModelId),
    Table(TableId),
}

The target of an Update statement.

Specifies what entity is being updated. At the model level this is a model ID or a scoped query. After lowering, it becomes a table ID.

Examples

use toasty_core::stmt::UpdateTarget;
use toasty_core::schema::app::ModelId;

let target = UpdateTarget::Model(ModelId(0));
assert_eq!(target.model_id(), Some(ModelId(0)));

Variants

Query(Box<Query>)

Update records returned by a query. The query must select a model.

Model(ModelId)

Update a model by its ID.

Table(TableId)

Update a database table (lowered form).

Implementations

impl UpdateTarget

pub fn model_id(&self) -> Option<ModelId>

Returns the model ID for this target, if applicable.

pub fn model_id_unwrap(&self) -> ModelId

Returns the model ID for this target.

Panics

Panics if this is a Table variant.

pub fn is_table(&self) -> bool

Returns true if this target is a Table variant.

pub fn table(table: impl Into<TableId>) -> UpdateTarget

Creates a Table target from a table ID.

pub fn as_table(&self) -> Option<TableId>

Returns the table ID if this is a Table variant.

pub fn as_table_unwrap(&self) -> TableId

Returns the table ID, panicking if this is not a Table variant.

Panics

Panics if this is not a Table variant.

Trait Implementations

impl Clone for UpdateTarget

fn clone(&self) -> UpdateTarget

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UpdateTarget

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

Formats the value using the given formatter.

impl<'a, T> IntoExprTarget<'a, T> for &'a UpdateTarget

where T: Resolve,

fn into_expr_target(self, schema: &'a T) -> ExprTarget<'a>

Converts self into an ExprTarget using the provided schema.

impl PartialEq for UpdateTarget

fn eq(&self, other: &UpdateTarget) -> 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 StructuralPartialEq for UpdateTarget