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 SqlOrd for Text

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

HAS_STATIC_QUERY_ID: bool = true

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

fn query_id() -> Option<TypeId>

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

impl NotNull for Text

impl SingleValue for Text

impl HasSqlType<Text> for Sqlite

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

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Fetch the metadata for the given type

impl HasSqlType<Text> for Mysql

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

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Fetch the metadata for the given type

impl HasSqlType<Text> for Pg

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fn metadata(_: &PgMetadataLookup) -> PgTypeMetadata

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Fetch the metadata for the given type

impl Debug for Text

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

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Formats the value using the given formatter.

impl Clone for Text

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fn clone(&self) -> Text

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl Copy for Text

impl Default for Text

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fn default() -> Text

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Returns the "default value" for a type.

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

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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

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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

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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

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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

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Perform the conversion

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

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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(bytes: Option<&DB::RawValue>) -> Result<Self>

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See the trait documentation.

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

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

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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

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See the trait documentation.