Struct diesel::sql_types::Text

pub struct Text;

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

• String
• &str

FromSql impls

• String

Trait Implementations

impl<'expr, 'a> 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<'expr2, 'expr, 'a> 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<'expr2, 'expr> 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<'expr2, 'expr> 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> 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.

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

Performs copy-assignment from source.

impl Debug for Text

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

Formats the value using the given formatter.

impl Default for Text

fn default() -> Text

Returns the “default value” for a type.

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

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

See the trait documentation.

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

A specialized variant of from_sql for handling null values.

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<RawValue<'_, DB>>) -> Result<Self>

A specialized variant of from_sql for handling null values.

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<RawValue<'_, DB>>) -> Result<Self>

A specialized variant of from_sql for handling null values.

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<RawValue<'_, DB>>) -> Result<Self>

A specialized variant of from_sql for handling null values.

impl HasSqlType<Text> for Mysql

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

Fetch the metadata for the given type

impl HasSqlType<Text> for Pg

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

Fetch the metadata for the given type

impl HasSqlType<Text> for Sqlite

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

Fetch the metadata for the given type

impl QueryId for Text

type QueryId = Text

A type which uniquely represents Self in a SQL query.

const HAS_STATIC_QUERY_ID: bool = true

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

fn query_id() -> Option<TypeId>

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

impl SqlType for Text

type IsNull = NotNull

Is this type nullable?

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 Stringwhere 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 strwhere DB: Backend<BindCollector = 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