Struct Projection 

pub struct Projection<T>
where
    T: SqlEntity,
{ /* private fields */ }

A Projection defines what is output from a query in order to hydrate a [SQLEntity]

Implementations

impl<T> Projection<T>

where T: SqlEntity,

pub fn new(alias: &str) -> Self

Create a new projection with an alias. The alias is used to prefix the field names. If the alias is empty, the projection will not be aliased.

pub fn set_definition(self, name: &str, definition: &str) -> Self

Replace a field definition. It panics if the field is not declared.

pub fn get_fields(&self) -> Vec<String>

Return the field names list.

pub fn get_structure(&self) -> &Structure

Return the underlying structure.

Trait Implementations

impl<T> Clone for Projection<T>

where T: SqlEntity + Clone,

fn clone(&self) -> Projection<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for Projection<T>

where T: SqlEntity + Debug,

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

Formats the value using the given formatter.

impl<T> Default for Projection<T>

where T: SqlEntity,

fn default() -> Self

Returns the “default value” for a type.

impl<T: SqlEntity> Display for Projection<T>

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

Formats the value using the given formatter.