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use crate::{
ActiveModelTrait, ActiveValue, ColumnTrait, EntityTrait, IntoActiveModel, Iterable,
PrimaryKeyToColumn, QueryFilter, QueryTrait,
};
use core::marker::PhantomData;
use sea_query::DeleteStatement;
/// Defines the structure for a delete operation
#[derive(Clone, Debug)]
pub struct Delete;
/// Perform a delete operation on a model
#[derive(Clone, Debug)]
pub struct DeleteOne<A>
where
A: ActiveModelTrait,
{
pub(crate) query: DeleteStatement,
pub(crate) model: A,
}
/// Perform a delete operation on multiple models
#[derive(Clone, Debug)]
pub struct DeleteMany<E>
where
E: EntityTrait,
{
pub(crate) query: DeleteStatement,
pub(crate) entity: PhantomData<E>,
}
impl Delete {
/// Delete one Model or ActiveModel
///
/// Model
/// ```
/// use sea_orm::{entity::*, query::*, tests_cfg::cake, DbBackend};
///
/// assert_eq!(
/// Delete::one(cake::Model {
/// id: 1,
/// name: "Apple Pie".to_owned(),
/// })
/// .build(DbBackend::Postgres)
/// .to_string(),
/// r#"DELETE FROM "cake" WHERE "cake"."id" = 1"#,
/// );
/// ```
/// ActiveModel
/// ```
/// use sea_orm::{entity::*, query::*, tests_cfg::cake, DbBackend};
///
/// assert_eq!(
/// Delete::one(cake::ActiveModel {
/// id: ActiveValue::set(1),
/// name: ActiveValue::set("Apple Pie".to_owned()),
/// })
/// .build(DbBackend::Postgres)
/// .to_string(),
/// r#"DELETE FROM "cake" WHERE "cake"."id" = 1"#,
/// );
/// ```
pub fn one<E, A, M>(model: M) -> DeleteOne<A>
where
E: EntityTrait,
A: ActiveModelTrait<Entity = E>,
M: IntoActiveModel<A>,
{
let myself = DeleteOne {
query: DeleteStatement::new()
.from_table(A::Entity::default().table_ref())
.to_owned(),
model: model.into_active_model(),
};
myself.prepare()
}
/// Delete many ActiveModel
///
/// ```
/// use sea_orm::{entity::*, query::*, tests_cfg::fruit, DbBackend};
///
/// assert_eq!(
/// Delete::many(fruit::Entity)
/// .filter(fruit::Column::Name.contains("Apple"))
/// .build(DbBackend::Postgres)
/// .to_string(),
/// r#"DELETE FROM "fruit" WHERE "fruit"."name" LIKE '%Apple%'"#,
/// );
/// ```
pub fn many<E>(entity: E) -> DeleteMany<E>
where
E: EntityTrait,
{
DeleteMany {
query: DeleteStatement::new()
.from_table(entity.table_ref())
.to_owned(),
entity: PhantomData,
}
}
}
impl<A> DeleteOne<A>
where
A: ActiveModelTrait,
{
pub(crate) fn prepare(mut self) -> Self {
for key in <A::Entity as EntityTrait>::PrimaryKey::iter() {
let col = key.into_column();
let av = self.model.get(col);
match av {
ActiveValue::Set(value) | ActiveValue::Unchanged(value) => {
self = self.filter(col.eq(value));
}
ActiveValue::NotSet => panic!("PrimaryKey is not set"),
}
}
self
}
}
impl<A> QueryFilter for DeleteOne<A>
where
A: ActiveModelTrait,
{
type QueryStatement = DeleteStatement;
fn query(&mut self) -> &mut DeleteStatement {
&mut self.query
}
}
impl<E> QueryFilter for DeleteMany<E>
where
E: EntityTrait,
{
type QueryStatement = DeleteStatement;
fn query(&mut self) -> &mut DeleteStatement {
&mut self.query
}
}
impl<A> QueryTrait for DeleteOne<A>
where
A: ActiveModelTrait,
{
type QueryStatement = DeleteStatement;
fn query(&mut self) -> &mut DeleteStatement {
&mut self.query
}
fn as_query(&self) -> &DeleteStatement {
&self.query
}
fn into_query(self) -> DeleteStatement {
self.query
}
}
impl<E> QueryTrait for DeleteMany<E>
where
E: EntityTrait,
{
type QueryStatement = DeleteStatement;
fn query(&mut self) -> &mut DeleteStatement {
&mut self.query
}
fn as_query(&self) -> &DeleteStatement {
&self.query
}
fn into_query(self) -> DeleteStatement {
self.query
}
}
#[cfg(test)]
mod tests {
use crate::tests_cfg::{cake, fruit};
use crate::{entity::*, query::*, DbBackend};
#[test]
fn delete_1() {
assert_eq!(
Delete::one(cake::Model {
id: 1,
name: "Apple Pie".to_owned(),
})
.build(DbBackend::Postgres)
.to_string(),
r#"DELETE FROM "cake" WHERE "cake"."id" = 1"#,
);
assert_eq!(
Delete::one(cake::ActiveModel {
id: ActiveValue::set(1),
name: ActiveValue::set("Apple Pie".to_owned()),
})
.build(DbBackend::Postgres)
.to_string(),
r#"DELETE FROM "cake" WHERE "cake"."id" = 1"#,
);
}
#[test]
fn delete_2() {
assert_eq!(
Delete::many(fruit::Entity)
.filter(fruit::Column::Name.contains("Cheese"))
.build(DbBackend::Postgres)
.to_string(),
r#"DELETE FROM "fruit" WHERE "fruit"."name" LIKE '%Cheese%'"#,
);
}
}