Struct database::repository::schema::requirements::columns::description

pub struct description;

Trait Implementations

impl Clone for description

fn clone(&self) -> description

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Column for description

type Table = table

The table which this column belongs to

const NAME: &'static str = _

The name of this column

impl Debug for description

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

Formats the value using the given formatter.

impl Default for description

fn default() -> description

Returns the “default value” for a type.

impl Expression for description

type SqlType = Nullable<Text>

The type that this expression represents in SQL

impl<DB> QueryFragment<DB, NotSpecialized> for descriptionwhere
    DB: Backend,
    StaticQueryFragmentInstance<table>: QueryFragment<DB>,

fn walk_ast<'b>(
    &'b self,
    __diesel_internal_out: AstPass<'_, 'b, DB>
) -> QueryResult<()>

Walk over this QueryFragment for all passes.

impl QueryId for description

type QueryId = description

A type which uniquely represents Self in a SQL query.

const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by Self be uniquely identified by its type?

fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise.

impl ValidGrouping<()> for description

type IsAggregate = No

Is this expression aggregate?

impl<__GB> ValidGrouping<__GB> for descriptionwhere
    __GB: IsContainedInGroupBy<description, Output = Yes>,

type IsAggregate = Yes

Is this expression aggregate?

impl<QS> AppearsOnTable<QS> for descriptionwhere
    QS: AppearsInFromClause<table, Count = Once>,

impl Copy for description

impl SelectableExpression<table> for description