Struct PragmaKeyword 

pub struct PragmaKeyword(/* private fields */);

Available on crate feature __sqlite-shared only.

A keyword written unquoted, such as WAL or NORMAL.

A keyword that is empty or holds anything but ASCII letters, digits and underscores fails with Error::QueryBuilderError before reaching SQLite.

use diesel::sqlite::pragma::{
    PerSchema, Pragma, PragmaKeyword, ReadPragma, SchemaPragma, WritePragma,
};

struct Synchronous;

impl Pragma for Synchronous {
    const NAME: &'static str = "synchronous";
    type Scope = PerSchema;
}

impl ReadPragma for Synchronous {
    type SqlType = Integer;
}

impl WritePragma for Synchronous {
    type Argument<'a> = PragmaKeyword;
}

enum SynchronousMode {
    Off,
    Normal,
}

impl From<SynchronousMode> for PragmaKeyword {
    fn from(mode: SynchronousMode) -> Self {
        match mode {
            SynchronousMode::Off => PragmaKeyword::new("OFF"),
            SynchronousMode::Normal => PragmaKeyword::new("NORMAL"),
        }
    }
}

let conn = &mut SqliteConnection::establish(":memory:").unwrap();
Synchronous::set(SynchronousMode::Normal, None, conn)?;
assert_eq!(1, Synchronous::get::<i32>(None, conn)?);
Synchronous::set(SynchronousMode::Off, None, conn)?;
assert_eq!(0, Synchronous::get::<i32>(None, conn)?);

Implementations

impl PragmaKeyword

pub const fn new(keyword: &'static str) -> Self

Wrap keyword, which is checked when the statement is built.

Trait Implementations

impl Clone for PragmaKeyword

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PragmaKeyword

impl Debug for PragmaKeyword

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

Formats the value using the given formatter.

impl Eq for PragmaKeyword

impl PartialEq for PragmaKeyword

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PragmaArgument for PragmaKeyword

impl StructuralPartialEq for PragmaKeyword