Struct Query 

pub struct Query {
    pub eager_relations: Vec<String>,
    pub joins: Vec<Join>,
    pub filter: Option<Filter>,
    pub order_by: Vec<(String, OrderDirection)>,
    pub limit: Option<usize>,
    pub offset: Option<usize>,
    /* private fields */
}

A struct representing a query in the DBMS.

Fields

eager_relations: Vec<String>

Relations to eagerly load with the main records.

joins: Vec<Join>

Join operations

filter: Option<Filter>

Filter to apply to the query.

order_by: Vec<(String, OrderDirection)>

Order by clauses for sorting the results.

limit: Option<usize>

Limit on the number of records to return.

offset: Option<usize>

Offset for pagination.

Implementations

impl Query

pub fn builder() -> QueryBuilder

Creates a new QueryBuilder for building a query.

pub fn all_selected(&self) -> bool

Returns whether all columns are selected in the query.

pub fn columns<T>(&self) -> Vec<String>

where T: TableSchema,

Returns the list of columns to be selected in the query.

pub fn has_joins(&self) -> bool

Returns whether the query has any joins.

pub fn raw_columns(&self) -> &[String]

Returns the raw column names from the Select clause.

Unlike columns::<T>(), this does not expand Select::All using the table schema.

Trait Implementations

impl Clone for Query

fn clone(&self) -> Query

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Query

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

Formats the value using the given formatter.

impl Default for Query

fn default() -> Query

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Query

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Query

fn eq(&self, other: &Query) -> 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 Serialize for Query

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Query

impl StructuralPartialEq for Query