Struct diesel::sql_types::Text

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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

• String
• &str

FromSql impls

• String

Trait Implementations

impl<DB: Backend<RawValue = [u8]>> FromSql<Text, DB> for *const str[+]

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

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fn from_sql(bytes: Option<&DB::RawValue>) -> Result<Self>[−]

See the trait documentation.

impl<'expr> AsExpression<Text> for &'expr String[+]

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type Expression = Bound<Text, Self>

The expression being returned

fn as_expression(self) -> Self::Expression[−]

Perform the conversion

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

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type Expression = Bound<Text, Self>

The expression being returned

fn as_expression(self) -> Self::Expression[−]

Perform the conversion

impl AsExpression<Text> for String[+]

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type Expression = Bound<Text, Self>

The expression being returned

fn as_expression(self) -> Self::Expression[−]

Perform the conversion

impl<'expr> AsExpression<Text> for &'expr str[+]

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type Expression = Bound<Text, Self>

The expression being returned

fn as_expression(self) -> Self::Expression[−]

Perform the conversion

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

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type Expression = Bound<Text, Self>

The expression being returned

fn as_expression(self) -> Self::Expression[−]

Perform the conversion

impl QueryId for Text[+]

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type QueryId = Text

A type which uniquely represents Self in a SQL query.

const HAS_STATIC_QUERY_ID: bool[−][−]

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<DB: Backend> ToSql<Text, DB> for str[+]

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fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result[−]

See the trait documentation.

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

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fn to_sql<W: Write>(&self, out: &mut Output<W, DB>) -> Result[−]

See the trait documentation.

impl SqlOrd for Text

impl HasSqlType<Text> for Mysql[+]

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fn metadata(_: &()) -> MysqlType[−]

Fetch the metadata for the given type

impl NotNull for Text

impl SingleValue for Text

impl Copy for Text

impl Default for Text[+]

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fn default() -> Text[−]

Returns the "default value" for a type.

impl Clone for Text[+]

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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[+]

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fn fmt(&self, f: &mut Formatter) -> Result[−]

Formats the value using the given formatter.