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

§FromSql impls

Trait Implementations§

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

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

The expression being returned
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fn as_expression(self) -> Self::Expression

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

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

The expression being returned
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fn as_expression(self) -> Self::Expression

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

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

The expression being returned
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fn as_expression(self) -> Self::Expression

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

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

The expression being returned
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fn as_expression(self) -> Self::Expression

Perform the conversion
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impl<'expr> AsExpression<Text> for &'expr String

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

The expression being returned
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fn as_expression(self) -> Self::Expression

Perform the conversion
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impl<'expr> AsExpression<Text> for &'expr str

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

The expression being returned
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fn as_expression(self) -> Self::Expression

Perform the conversion
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impl<'a> AsExpression<Text> for MigrationVersion<'a>

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

The expression being returned
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fn as_expression(self) -> Self::Expression

Perform the conversion
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impl AsExpression<Text> for String

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type Expression = Bound<Text, String>

The expression being returned
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fn as_expression(self) -> Self::Expression

Perform the conversion
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impl Clone for Text

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fn clone(&self) -> Text

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Text

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

Formats the value using the given formatter. Read more
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impl Default for Text

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fn default() -> Text

Returns the “default value” for a type. Read more
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impl<'a, DB> FromSql<Text, DB> for MigrationVersion<'a>
where String: FromSql<Text, DB>, DB: Backend,

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

See the trait documentation.
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fn from_nullable_sql(bytes: Option<RawValue<'_, DB>>) -> Result<Self>

A specialized variant of from_sql for handling null values. Read more
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impl FromSql<Text, Pg> 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(value: PgValue<'_>) -> Result<Self>

See the trait documentation.
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fn from_nullable_sql(bytes: Option<RawValue<'_, DB>>) -> Result<Self>

A specialized variant of from_sql for handling null values. Read more
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impl HasSqlType<Text> for Pg

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

Fetch the metadata for the given type Read more
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impl QueryId for Text

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type QueryId = Text

A type which uniquely represents Self in a SQL query. Read more
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const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by Self be uniquely identified by its type? Read more
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fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise. Read more
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impl SqlType for Text

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type IsNull = NotNull

Is this type nullable? Read more
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impl<'a, DB> ToSql<Text, DB> for MigrationVersion<'a>
where Cow<'a, str>: ToSql<Text, DB>, DB: Backend,

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

See the trait documentation.
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impl<DB> ToSql<Text, DB> for String
where DB: Backend, str: ToSql<Text, DB>,

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

See the trait documentation.
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impl<DB> ToSql<Text, DB> for str
where DB: Backend<BindCollector = RawBytesBindCollector<DB>>,

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

See the trait documentation.
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impl Copy for Text

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impl SingleValue for Text

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impl SqlOrd for Text

Auto Trait Implementations§

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impl Freeze for Text

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impl RefUnwindSafe for Text

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impl Send for Text

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impl Sync for Text

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impl Unpin for Text

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impl UnwindSafe for Text

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<ST, U, DB> CompatibleType<U, DB> for ST
where DB: Backend, ST: SqlType + SingleValue, U: FromSqlRow<ST, DB>,

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type SqlType = ST

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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type NotNullable = T

The not nullable representation of this type. Read more
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impl<T> IntoNullable for T
where T: SqlType<IsNull = NotNull> + SingleValue,

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type Nullable = Nullable<T>

The nullable representation of this type. Read more
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impl<T> IntoSql for T

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fn into_sql<T>(self) -> AsExprOf<Self, T>

Convert self to an expression for Diesel’s query builder. Read more
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fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>

Convert &self to an expression for Diesel’s query builder. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<ST> TypedExpressionType for ST
where ST: SingleValue,