pub struct InsertStatement<T: QuerySource, U, Op = Insert, Ret = NoReturningClause> { /* private fields */ }
Expand description

A fully constructed insert statement.

The parameters of this struct represent:

  • T: The table we are inserting into
  • U: The data being inserted
  • Op: The operation being performed. The specific types used to represent this are private, but correspond to SQL such as INSERT or REPLACE. You can safely rely on the default type representing INSERT
  • Ret: The RETURNING clause of the query. The specific types used to represent this are private. You can safely rely on the default type representing a query without a RETURNING clause.

Implementations§

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impl<T: QuerySource, U, C, Op, Ret> InsertStatement<T, InsertFromSelect<U, C>, Op, Ret>

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pub fn into_columns<C2>( self, columns: C2 ) -> InsertStatement<T, InsertFromSelect<U, C2>, Op, Ret>where C2: ColumnList<Table = T> + Expression, U: Query<SqlType = C2::SqlType>,

Set the column list when inserting from a select statement

See the documentation for insert_into for usage examples.

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impl<T: QuerySource, U, Op> InsertStatement<T, U, Op>

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pub fn returning<E>( self, returns: E ) -> InsertStatement<T, U, Op, ReturningClause<E>>where InsertStatement<T, U, Op, ReturningClause<E>>: Query,

Specify what expression is returned after execution of the insert.

Examples
Inserting records:
let inserted_names = diesel::insert_into(users)
    .values(&vec![name.eq("Timmy"), name.eq("Jimmy")])
    .returning(name)
    .get_results(connection);
assert_eq!(Ok(vec!["Timmy".to_string(), "Jimmy".to_string()]), inserted_names);
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impl<T, U, Op, Ret> InsertStatement<T, U, Op, Ret>where T: QuerySource, U: UndecoratedInsertRecord<T> + IntoConflictValueClause,

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pub fn on_conflict_do_nothing( self ) -> InsertStatement<T, OnConflictValues<U::ValueClause, NoConflictTarget, DoNothing<T>>, Op, Ret>

Adds ON CONFLICT DO NOTHING to the insert statement, without specifying any columns or constraints to restrict the conflict to.

Examples
Single Record
let user = User { id: 1, name: "Sean" };

let user_count = users.count().get_result::<i64>(conn)?;
assert_eq!(user_count, 0);

diesel::insert_into(users)
    .values(&user)
    .on_conflict_do_nothing()
    .execute(conn)?;
let user_count = users.count().get_result::<i64>(conn)?;
assert_eq!(user_count, 1);

diesel::insert_into(users)
    .values(&user)
    .on_conflict_do_nothing()
    .execute(conn)?;
let user_count = users.count().get_result::<i64>(conn)?;
assert_eq!(user_count, 1);
Vec of Records
let user = User { id: 1, name: "Sean" };

let inserted_row_count = diesel::insert_into(users)
    .values(&vec![user, user])
    .on_conflict_do_nothing()
    .execute(conn)?;
let user_count = users.count().get_result::<i64>(conn)?;
assert_eq!(user_count, 1);
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pub fn on_conflict<Target>( self, target: Target ) -> IncompleteOnConflict<InsertStatement<T, U::ValueClause, Op, Ret>, ConflictTarget<Target>>where ConflictTarget<Target>: OnConflictTarget<T>,

Adds an ON CONFLICT to the insert statement, if a conflict occurs for the given unique constraint.

Target can be one of:

Examples
Specifying a column as the target

This is supported by sqlite and postgres only

use diesel::upsert::*;

diesel::sql_query("CREATE UNIQUE INDEX users_name ON users (name)").execute(conn).unwrap();
let user = User { id: 1, name: "Sean" };
let same_name_different_id = User { id: 2, name: "Sean" };
let same_id_different_name = User { id: 1, name: "Pascal" };
assert_eq!(Ok(1), diesel::insert_into(users).values(&user).execute(conn));

let query = diesel::insert_into(users)
    .values(&same_id_different_name)
    .on_conflict(id)
    .do_nothing()
    .execute(conn)?;

let user_names = users.select(name).load::<String>(conn)?;
assert_eq!(user_names, vec![String::from("Sean")]);

let idx_conflict_result = diesel::insert_into(users)
    .values(&same_name_different_id)
    .on_conflict(id)
    .do_nothing()
    .execute(conn);
assert!(idx_conflict_result.is_err());
#[cfg(feature = "mysql")]
fn run_test() -> diesel::QueryResult<()> { Ok(()) }
Specifying multiple columns as the target

This is supported by sqlite and postgres only

use diesel::upsert::*;

diesel::sql_query("CREATE UNIQUE INDEX users_name_hair_color ON users (name, hair_color)").execute(conn).unwrap();
let user = User { id: 1, name: "Sean", hair_color: "black" };
let same_name_different_hair_color = User { id: 2, name: "Sean", hair_color: "brown" };
let same_name_same_hair_color = User { id: 3, name: "Sean", hair_color: "black" };

assert_eq!(Ok(1), diesel::insert_into(users).values(&user).execute(conn));

let inserted_row_count = diesel::insert_into(users)
    .values(&same_name_different_hair_color)
    .on_conflict((name, hair_color))
    .do_nothing()
    .execute(conn);
assert_eq!(Ok(1), inserted_row_count);

let inserted_row_count = diesel::insert_into(users)
    .values(&same_name_same_hair_color)
    .on_conflict((name, hair_color))
    .do_nothing()
    .execute(conn);
assert_eq!(Ok(0), inserted_row_count);

#[cfg(feature = "mysql")]
fn main() {}
ON DUPLICATE KEY

Mysql supports only catching all duplicated keys at once:

use diesel::upsert::*;

diesel::sql_query("CREATE UNIQUE INDEX users_name ON users (name)").execute(conn).unwrap();
let user = User { id: 1, name: "Sean" };
let same_name_different_id = User { id: 2, name: "Sean" };
let same_id_different_name = User { id: 1, name: "Pascal" };

assert_eq!(Ok(1), diesel::insert_into(users).values(&user).execute(conn));

let user_names = users.select(name).load::<String>(conn)?;
assert_eq!(user_names, vec![String::from("Sean")]);

let query = diesel::insert_into(users)
    .values(&same_id_different_name)
    .on_conflict(diesel::dsl::DuplicatedKeys)
    .do_nothing()
    .execute(conn)?;

let user_names = users.select(name).load::<String>(conn)?;
assert_eq!(user_names, vec![String::from("Sean")]);

let idx_conflict_result = diesel::insert_into(users)
    .values(&same_name_different_id)
    .on_conflict(diesel::dsl::DuplicatedKeys)
    .do_nothing()
    .execute(conn)?;

let user_names = users.select(name).load::<String>(conn)?;
assert_eq!(user_names, vec![String::from("Sean")]);
#[cfg(not(feature = "mysql"))]
fn run_test() -> diesel::QueryResult<()> {Ok(())}

See the documentation for on_constraint and do_update for more examples.

Trait Implementations§

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impl<T, U, Op> AsQuery for InsertStatement<T, U, Op, NoReturningClause>where T: Table, InsertStatement<T, U, Op, ReturningClause<T::AllColumns>>: Query,

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type SqlType = <<InsertStatement<T, U, Op, NoReturningClause> as AsQuery>::Query as Query>::SqlType

The SQL type of Self::Query
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type Query = InsertStatement<T, U, Op, ReturningClause<<T as Table>::AllColumns>>

What kind of query does this type represent?
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fn as_query(self) -> Self::Query

Converts a type which semantically represents a SQL query into the actual query being executed. See the trait level docs for more.
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impl<T: Clone + QuerySource, U: Clone, Op: Clone, Ret: Clone> Clone for InsertStatement<T, U, Op, Ret>where T::FromClause: Clone,

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fn clone(&self) -> InsertStatement<T, U, Op, Ret>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T: Debug + QuerySource, U: Debug, Op: Debug, Ret: Debug> Debug for InsertStatement<T, U, Op, Ret>where T::FromClause: Debug,

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

Formats the value using the given formatter. Read more
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impl<T, U, Op, Ret> Query for InsertStatement<T, U, Op, ReturningClause<Ret>>where T: QuerySource, Ret: Expression + SelectableExpression<T> + NonAggregate,

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type SqlType = <Ret as Expression>::SqlType

The SQL type that this query represents. Read more
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impl<T, U, Op, Ret> QueryId for InsertStatement<T, U, Op, Ret>where T: QuerySource + QueryId + 'static, U: QueryId, Op: QueryId, Ret: QueryId,

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type QueryId = InsertStatement<T, <U as QueryId>::QueryId, <Op as QueryId>::QueryId, <Ret as QueryId>::QueryId>

A type which uniquely represents Self in a SQL query. Read more
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const HAS_STATIC_QUERY_ID: bool = _

Can the SQL generated by Self be uniquely identified by its type? Read more
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fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise. Read more
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impl<T: QuerySource, U, Op, Ret, Conn> RunQueryDsl<Conn> for InsertStatement<T, U, Op, Ret>

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fn load<'query, U>(self, conn: &mut Conn) -> QueryResult<Vec<U>>where Self: LoadQuery<'query, Conn, U>,

Executes the given query, returning a Vec with the returned rows. Read more
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fn load_iter<'conn, 'query: 'conn, U, B>( self, conn: &'conn mut Conn ) -> QueryResult<Self::RowIter<'conn>>where U: 'conn, Self: LoadQuery<'query, Conn, U, B> + 'conn,

Executes the given query, returning an Iterator with the returned rows. Read more
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fn get_result<'query, U>(self, conn: &mut Conn) -> QueryResult<U>where Self: LoadQuery<'query, Conn, U>,

Runs the command, and returns the affected row. Read more
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fn get_results<'query, U>(self, conn: &mut Conn) -> QueryResult<Vec<U>>where Self: LoadQuery<'query, Conn, U>,

Runs the command, returning an Vec with the affected rows. Read more
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impl<T: Copy + QuerySource, U: Copy, Op: Copy, Ret: Copy> Copy for InsertStatement<T, U, Op, Ret>where T::FromClause: Copy,

Auto Trait Implementations§

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impl<T, U, Op, Ret> RefUnwindSafe for InsertStatement<T, U, Op, Ret>where Op: RefUnwindSafe, Ret: RefUnwindSafe, T: RefUnwindSafe, U: RefUnwindSafe, <T as QuerySource>::FromClause: RefUnwindSafe,

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impl<T, U, Op, Ret> Send for InsertStatement<T, U, Op, Ret>where Op: Send, Ret: Send, T: Send, U: Send, <T as QuerySource>::FromClause: Send,

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impl<T, U, Op, Ret> Sync for InsertStatement<T, U, Op, Ret>where Op: Sync, Ret: Sync, T: Sync, U: Sync, <T as QuerySource>::FromClause: Sync,

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impl<T, U, Op, Ret> Unpin for InsertStatement<T, U, Op, Ret>where Op: Unpin, Ret: Unpin, T: Unpin, U: Unpin, <T as QuerySource>::FromClause: Unpin,

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impl<T, U, Op, Ret> UnwindSafe for InsertStatement<T, U, Op, Ret>where Op: UnwindSafe, Ret: UnwindSafe, T: UnwindSafe, U: UnwindSafe, <T as QuerySource>::FromClause: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> AsQuery for Twhere T: Query,

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type SqlType = <T as Query>::SqlType

The SQL type of Self::Query
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type Query = T

What kind of query does this type represent?
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fn as_query(self) -> <T as AsQuery>::Query

Converts a type which semantically represents a SQL query into the actual query being executed. See the trait level docs for more.
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<Conn, DB, T> ExecuteDsl<Conn, DB> for Twhere Conn: Connection<Backend = DB>, DB: Backend, T: QueryFragment<DB, NotSpecialized> + QueryId,

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fn execute(query: T, conn: &mut Conn) -> Result<usize, Error>

Execute this command
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoSql for T

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fn into_sql<T>(self) -> AsExprOf<Self, T>where Self: AsExpression<T> + Sized, T: SqlType + TypedExpressionType,

Convert self to an expression for Diesel’s query builder. Read more
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fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>where &'a Self: AsExpression<T>, T: SqlType + TypedExpressionType,

Convert &self to an expression for Diesel’s query builder. Read more
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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.