Module diesel::prelude

Re-exports important traits and types. Meant to be glob imported when using Diesel.

Reexports

pub use associations::Identifiable;

pub use connection::Connection;

pub use expression::Expression;

pub use expression::SelectableExpression;

pub use expression::AppearsOnTable;

pub use expression::BoxableExpression;

pub use expression_methods::*;

pub use query_source::QuerySource;

pub use query_source::Queryable;

pub use query_source::Table;

pub use query_source::Column;

pub use result::QueryResult;

pub use result::ConnectionError;

pub use result::ConnectionResult;

pub use result::OptionalExtension;

Structs

PgConnection

The connection string expected by PgConnection::establish should be a PostgreSQL connection string, as documented at http://www.postgresql.org/docs/9.4/static/libpq-connect.html#LIBPQ-CONNSTRING

Traits

BelongingToDsl
BoxedDsl	Boxes the pieces of a query into a single type. This is useful for cases where you want to conditionally modify a query, but need the type to remain the same. The backend must be specified as part of this. It is not possible to box a query and have it be useable on multiple backends.
CountDsl	Adds a simple count function to queries. Automatically implemented for all types which implement SelectDsl.
DistinctDsl	Adds the DISTINCT keyword to a query.
ExecuteDsl
FilterDsl	Adds to the WHERE clause of a query. If there is already a WHERE clause, the result will be old AND new. This is automatically implemented for the various query builder types.
FindDsl	Attempts to find a single record from the given table by primary key.
FirstDsl
GroupedBy
Insertable	Represents that a structure can be used to insert a new row into the database. This is automatically implemented for &[T] and &Vec<T> for inserting more than one record.
JoinDsl	Methods allowing various joins between two or more tables.
JoinOnDsl
JoinTo	Indicates that two tables can be used together in a JOIN clause. Implementations of this trait will be generated for you automatically by the association annotations from codegen.
LimitDsl	Sets the limit clause of a query. If there was already a limit clause, it will be overridden. This is automatically implemented for the various query builder types.
LoadDsl	Methods to execute a query given a connection. These are automatically implemented for the various query types.
LoadQuery
OffsetDsl	Sets the offset clause of a query. If there was already a offset clause, it will be overridden. This is automatically implemented for the various query builder types.
OrderDsl	Sets the order clause of a query. If there was already a order clause, it will be overridden. The expression passed to order must actually be valid for the query. See also: .desc() and .asc()
SaveChangesDsl
SelectDsl	Sets the select clause of a query. If there was already a select clause, it will be overridden. The expression passed to select must actually be valid for the query (only contains columns from the target table, doesn't mix aggregate + non-aggregate expressions, etc).