Method distinct

src/query/helper.rs:338–341

Add a DISTINCT expression ``` use sea_orm::{entity::*, query::*, tests_cfg::cake, DbBackend}; struct Input { name: Option , } let input = Input { name: Some("cheese".to_owned()), }; assert_eq!( cake::Entity::find() .filter( Condition::all().add_option(input.name.map(|n| cake::Column::Name.contains(&n))) ) .distinct() .build(DbBackend::MySql) .to_string(), "SELECT DISTINCT `cake`.`id`, `cake

(mut self)

    /// );
    /// ```
    fn distinct(mut self) -> Self {
        self.query().distinct();
        self
    }

    /// Add a DISTINCT ON expression
    /// NOTE: this function is only supported by `sqlx-postgres`