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§
source§impl<'expr, 'a> AsExpression<Text> for &'expr MigrationVersion<'a>
impl<'expr, 'a> AsExpression<Text> for &'expr MigrationVersion<'a>
§type Expression = Bound<Text, &'expr MigrationVersion<'a>>
type Expression = Bound<Text, &'expr MigrationVersion<'a>>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl<'expr> AsExpression<Text> for &'expr String
impl<'expr> AsExpression<Text> for &'expr String
§type Expression = Bound<Text, &'expr String>
type Expression = Bound<Text, &'expr String>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl<'expr> AsExpression<Text> for &'expr str
impl<'expr> AsExpression<Text> for &'expr str
§type Expression = Bound<Text, &'expr str>
type Expression = Bound<Text, &'expr str>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl<'expr2, 'expr, 'a> AsExpression<Text> for &'expr2 &'expr MigrationVersion<'a>
impl<'expr2, 'expr, 'a> AsExpression<Text> for &'expr2 &'expr MigrationVersion<'a>
§type Expression = Bound<Text, &'expr2 &'expr MigrationVersion<'a>>
type Expression = Bound<Text, &'expr2 &'expr MigrationVersion<'a>>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl<'expr2, 'expr> AsExpression<Text> for &'expr2 &'expr String
impl<'expr2, 'expr> AsExpression<Text> for &'expr2 &'expr String
§type Expression = Bound<Text, &'expr2 &'expr String>
type Expression = Bound<Text, &'expr2 &'expr String>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl<'expr2, 'expr> AsExpression<Text> for &'expr2 &'expr str
impl<'expr2, 'expr> AsExpression<Text> for &'expr2 &'expr str
§type Expression = Bound<Text, &'expr2 &'expr str>
type Expression = Bound<Text, &'expr2 &'expr str>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl<'a> AsExpression<Text> for MigrationVersion<'a>
impl<'a> AsExpression<Text> for MigrationVersion<'a>
§type Expression = Bound<Text, MigrationVersion<'a>>
type Expression = Bound<Text, MigrationVersion<'a>>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl AsExpression<Text> for String
impl AsExpression<Text> for String
§type Expression = Bound<Text, String>
type Expression = Bound<Text, String>
The expression being returned
source§fn as_expression(self) -> Self::Expression
fn as_expression(self) -> Self::Expression
Perform the conversion
source§impl<'a, DB> FromSql<Text, DB> for MigrationVersion<'a>where
String: FromSql<Text, DB>,
DB: Backend,
impl<'a, DB> FromSql<Text, DB> for MigrationVersion<'a>where String: FromSql<Text, DB>, DB: Backend,
source§impl FromSql<Text, Pg> for *const str
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
source§impl HasSqlType<Text> for Pg
impl HasSqlType<Text> for Pg
source§fn metadata(_: &mut Self::MetadataLookup) -> PgTypeMetadata
fn metadata(_: &mut Self::MetadataLookup) -> PgTypeMetadata
Fetch the metadata for the given type Read more
source§impl QueryId for Text
impl QueryId for Text
source§const HAS_STATIC_QUERY_ID: bool = true
const HAS_STATIC_QUERY_ID: bool = true
Can the SQL generated by
Self
be uniquely identified by its type? Read moresource§impl<'a, DB> ToSql<Text, DB> for MigrationVersion<'a>where
Cow<'a, str>: ToSql<Text, DB>,
DB: Backend,
impl<'a, DB> ToSql<Text, DB> for MigrationVersion<'a>where Cow<'a, str>: ToSql<Text, DB>, DB: Backend,
source§impl<DB> ToSql<Text, DB> for strwhere
DB: Backend<BindCollector = RawBytesBindCollector<DB>>,
impl<DB> ToSql<Text, DB> for strwhere DB: Backend<BindCollector = RawBytesBindCollector<DB>>,
impl Copy for Text
impl SingleValue for Text
impl SqlOrd for Text
Auto Trait Implementations§
impl RefUnwindSafe for Text
impl Send for Text
impl Sync for Text
impl Unpin for Text
impl UnwindSafe for Text
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<ST, U, DB> CompatibleType<U, DB> for STwhere
DB: Backend,
ST: SqlType + SingleValue,
U: FromSqlRow<ST, DB>,
impl<ST, U, DB> CompatibleType<U, DB> for STwhere DB: Backend, ST: SqlType + SingleValue, U: FromSqlRow<ST, DB>,
source§impl<T> IntoNotNullable for Twhere
T: SqlType<IsNull = NotNull>,
impl<T> IntoNotNullable for Twhere T: SqlType<IsNull = NotNull>,
§type NotNullable = T
type NotNullable = T
The not nullable representation of this type. Read more
source§impl<T> IntoNullable for Twhere
T: SqlType<IsNull = NotNull> + SingleValue,
impl<T> IntoNullable for Twhere T: SqlType<IsNull = NotNull> + SingleValue,
source§impl<T> IntoSql for T
impl<T> IntoSql for T
source§fn into_sql<T>(self) -> AsExprOf<Self, T>where
Self: AsExpression<T> + Sized,
T: SqlType + TypedExpressionType,
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 moresource§fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>where
&'a Self: AsExpression<T>,
T: SqlType + TypedExpressionType,
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