diesel::sql_types

Struct Text

pub struct Text;

Expand description

The text SQL type.

On all backends strings must be valid UTF-8. On PostgreSQL strings must not include nul bytes.

Schema inference will treat all variants of TEXT as this type (e.g. VARCHAR, MEDIUMTEXT, etc).

§`ToSql` impls

§`FromSql` impls

String

Trait Implementations§

impl<'a, 'expr, 'expr2> AsExpression<Text> for &'expr2 &'expr MigrationVersion<'a>

type Expression = Bound<Text, &'expr2 &'expr MigrationVersion<'a>>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'expr, 'expr2> AsExpression<Text> for &'expr2 &'expr String

type Expression = Bound<Text, &'expr2 &'expr String>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'expr, 'expr2> AsExpression<Text> for &'expr2 &'expr str

type Expression = Bound<Text, &'expr2 &'expr str>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'a, 'expr> AsExpression<Text> for &'expr MigrationVersion<'a>

type Expression = Bound<Text, &'__expr MigrationVersion<'a>>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'expr> AsExpression<Text> for &'expr String

type Expression = Bound<Text, &'__expr String>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'expr> AsExpression<Text> for &'expr str

type Expression = Bound<Text, &'__expr str>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<'a> AsExpression<Text> for MigrationVersion<'a>

type Expression = Bound<Text, MigrationVersion<'a>>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl AsExpression<Text> for String

type Expression = Bound<Text, String>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl Clone for Text

fn clone(&self) -> Text

Returns a copy of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

impl Debug for Text

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

Formats the value using the given formatter. Read more

impl Default for Text

fn default() -> Text

Returns the “default value” for a type. Read more

impl<'a, DB> FromSql<Text, DB> for MigrationVersion<'a>
where String: FromSql<Text, DB>, DB: Backend,

fn from_sql(bytes: DB::RawValue<'_>) -> Result<Self>

See the trait documentation.

fn from_nullable_sql(bytes: Option<DB::RawValue<'_>>) -> Result<Self>

A specialized variant of from_sql for handling null values. Read more

impl FromSql<Text, Mysql> for *const str

Available on crate feature mysql_backend only.

The returned pointer is only valid for the lifetime to the argument of from_sql. This impl is intended for uses where you want to write a new impl in terms of String, but don’t want to allocate. We have to return a raw pointer instead of a reference with a lifetime due to the structure of FromSql

fn from_sql(value: MysqlValue<'_>) -> Result<Self>

See the trait documentation.

fn from_nullable_sql(bytes: Option<DB::RawValue<'_>>) -> Result<Self>

A specialized variant of from_sql for handling null values. Read more

impl FromSql<Text, Pg> for *const str

Available on crate feature postgres_backend only.

The returned pointer is only valid for the lifetime to the argument of from_sql. This impl is intended for uses where you want to write a new impl in terms of String, but don’t want to allocate. We have to return a raw pointer instead of a reference with a lifetime due to the structure of FromSql

fn from_sql(value: PgValue<'_>) -> Result<Self>

See the trait documentation.

fn from_nullable_sql(bytes: Option<DB::RawValue<'_>>) -> Result<Self>

A specialized variant of from_sql for handling null values. Read more

impl FromSql<Text, Sqlite> for *const str

Available on crate feature sqlite only.

The returned pointer is only valid for the lifetime to the argument of from_sql. This impl is intended for uses where you want to write a new impl in terms of String, but don’t want to allocate. We have to return a raw pointer instead of a reference with a lifetime due to the structure of FromSql

fn from_sql(value: SqliteValue<'_, '_, '_>) -> Result<Self>

See the trait documentation.

fn from_nullable_sql(bytes: Option<DB::RawValue<'_>>) -> Result<Self>

A specialized variant of from_sql for handling null values. Read more

impl HasSqlType<Text> for Mysql

fn metadata(_: &mut ()) -> MysqlType

Fetch the metadata for the given type Read more

impl HasSqlType<Text> for Pg

fn metadata(_: &mut Self::MetadataLookup) -> PgTypeMetadata

Fetch the metadata for the given type Read more

impl HasSqlType<Text> for Sqlite

fn metadata(_: &mut ()) -> SqliteType

Fetch the metadata for the given type Read more

impl QueryId for Text

const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by Self be uniquely identified by its type? Read more

type QueryId = Text

A type which uniquely represents Self in a SQL query. Read more

fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise. Read more

impl Queryable<Text, Mysql> for *const str

Available on crate feature mysql_backend only.

type Row = *const str

The Rust type you’d like to map from. Read more

fn build(row: Self::Row) -> Result<Self>

Construct an instance of this type

impl Queryable<Text, Pg> for *const str

Available on crate feature postgres_backend only.

type Row = *const str

The Rust type you’d like to map from. Read more

fn build(row: Self::Row) -> Result<Self>

Construct an instance of this type

impl Queryable<Text, Sqlite> for *const str

Available on crate feature sqlite only.

type Row = *const str

The Rust type you’d like to map from. Read more

fn build(row: Self::Row) -> Result<Self>

Construct an instance of this type

impl SqlType for Text

type IsNull = NotNull

Is this type nullable? Read more

impl<'a, DB> ToSql<Text, DB> for MigrationVersion<'a>
where Cow<'a, str>: ToSql<Text, DB>, DB: Backend,

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, DB>) -> Result

See the trait documentation.

impl<DB> ToSql<Text, DB> for String
where DB: Backend, str: ToSql<Text, DB>,

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, DB>) -> Result

See the trait documentation.

impl<DB> ToSql<Text, DB> for str
where for<'a> DB: Backend<BindCollector<'a> = RawBytesBindCollector<DB>>,

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, DB>) -> Result

See the trait documentation.

impl ToSql<Text, Sqlite> for str

Available on crate feature sqlite only.

fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Sqlite>) -> Result

See the trait documentation.

impl Copy for Text

impl SingleValue for Text

impl SqlOrd for Text

Auto Trait Implementations§

impl Freeze for Text

impl RefUnwindSafe for Text

impl Send for Text

impl Sync for Text

impl Unpin for Text

impl UnwindSafe for Text

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dst. Read more

impl<ST, U, DB> CompatibleType<U, DB> for ST
where DB: Backend, ST: SqlType + SingleValue, U: FromSqlRow<ST, DB>,

type SqlType = ST

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

fn into(self) -> U

Calls U::from(self).

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

impl<T> IntoNotNullable for T
where T: SqlType<IsNull = NotNull>,

type NotNullable = T

The not nullable representation of this type. Read more

impl<T> IntoNullable for T
where T: SqlType<IsNull = NotNull> + SingleValue,

type Nullable = Nullable<T>

The nullable representation of this type. Read more

impl<T> IntoSql for T

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

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

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn vzip(self) -> V

impl<T> ErasedDestructor for T
where T: 'static,

impl<T> MaybeSendSync for T

impl<ST> TypedExpressionType for ST
where ST: SingleValue,