Struct SelectFields 

pub struct SelectFields {
    pub span: Span,
    pub fields: IndexMap<Meta<ColumnName>, Option<FieldDef>>,
}

SELECT clause.

Fields

span: Span

Source span of the select block.

fields: IndexMap<Meta<ColumnName>, Option<FieldDef>>

Implementations

impl SelectFields

pub fn has_relations(&self) -> bool

Check if this select has any relations.

pub fn has_vec_relations(&self) -> bool

Check if this select has any Vec (has-many) relations.

pub fn has_nested_vec_relations(&self) -> bool

Check if this select has nested Vec relations.

pub fn has_count(&self) -> bool

Check if this select has any count aggregations.

pub fn columns( &self, ) -> impl Iterator<Item = (&Meta<ColumnName>, &Option<FieldDef>)>

Iterate over simple columns (fields with None FieldDef).

pub fn relations(&self) -> impl Iterator<Item = (&Meta<ColumnName>, &Relation)>

Iterate over relations (fields with Some(FieldDef::Rel(_))).

pub fn counts( &self, ) -> impl Iterator<Item = (&Meta<ColumnName>, &Vec<Meta<TableName>>)>

Iterate over count aggregations (fields with Some(FieldDef::Count(_))).

pub fn first_column(&self) -> Option<&ColumnName>

Get the first column name (first simple column, not a relation). Returns None if there are no simple columns.

pub fn id_column(&self) -> Option<&ColumnName>

Get the ID column name (column named “id”, or first column as fallback). Returns None if there are no simple columns.

Trait Implementations

impl Debug for SelectFields

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

Formats the value using the given formatter.

impl<'ʄ> Facet<'ʄ> for SelectFields

const SHAPE: &'static Shape

The shape of this type, including: whether it’s a Struct, an Enum, something else?