[−]Trait amadeus::source::postgres::_internal::types::FromSql
A trait for types that can be created from a Postgres value.
Types
The following implementations are provided by this crate, along with the corresponding Postgres types:
Rust type | Postgres type(s) |
---|---|
bool | BOOL |
i8 | "char" |
i16 | SMALLINT, SMALLSERIAL |
i32 | INT, SERIAL |
u32 | OID |
i64 | BIGINT, BIGSERIAL |
f32 | REAL |
f64 | DOUBLE PRECISION |
String | VARCHAR, CHAR(n), TEXT, CITEXT, NAME, UNKNOWN |
Vec<u8> | BYTEA |
HashMap<String, Option<String>> | HSTORE |
In addition, some implementations are provided for types in third party
crates. These are disabled by default; to opt into one of these
implementations, activate the Cargo feature corresponding to the crate's
name prefixed by with-
. For example, the with-serde_json
feature enables
the implementation for the serde_json::Value
type.
Rust type | Postgres type(s) |
---|---|
serialize::json::Json | JSON, JSONB |
serde_json::Value | JSON, JSONB |
time::Timespec | TIMESTAMP, TIMESTAMP WITH TIME ZONE |
chrono::NaiveDateTime | TIMESTAMP |
chrono::DateTime<Utc> | TIMESTAMP WITH TIME ZONE |
chrono::DateTime<Local> | TIMESTAMP WITH TIME ZONE |
chrono::DateTime<FixedOffset> | TIMESTAMP WITH TIME ZONE |
chrono::NaiveDate | DATE |
chrono::NaiveTime | TIME |
eui48::MacAddress | MACADDR |
uuid::Uuid | UUID |
bit_vec::BitVec | BIT, VARBIT |
eui48::MacAddress | MACADDR |
Nullability
In addition to the types listed above, FromSql
is implemented for
Option<T>
where T
implements FromSql
. An Option<T>
represents a
nullable Postgres value.
Arrays
FromSql
is implemented for Vec<T>
where T
implements FromSql
, and
corresponds to one-dimensional Postgres arrays.
Required methods
fn from_sql(
ty: &Type,
raw: &[u8]
) -> Result<Self, Box<dyn Error + 'static + Send + Sync>>
ty: &Type,
raw: &[u8]
) -> Result<Self, Box<dyn Error + 'static + Send + Sync>>
Creates a new value of this type from a buffer of data of the specified
Postgres Type
in its binary format.
The caller of this method is responsible for ensuring that this type
is compatible with the Postgres Type
.
fn accepts(ty: &Type) -> bool
Determines if a value of this type can be created from the specified
Postgres Type
.
Provided methods
fn from_sql_null(
ty: &Type
) -> Result<Self, Box<dyn Error + 'static + Send + Sync>>
ty: &Type
) -> Result<Self, Box<dyn Error + 'static + Send + Sync>>
Creates a new value of this type from a NULL
SQL value.
The caller of this method is responsible for ensuring that this type
is compatible with the Postgres Type
.
The default implementation returns
Err(Box::new(WasNull))
.
fn from_sql_nullable(
ty: &Type,
raw: Option<&[u8]>
) -> Result<Self, Box<dyn Error + 'static + Send + Sync>>
ty: &Type,
raw: Option<&[u8]>
) -> Result<Self, Box<dyn Error + 'static + Send + Sync>>
A convenience function that delegates to from_sql
and from_sql_null
depending on the
value of raw
.
Implementations on Foreign Types
impl<T> FromSql for Vec<T> where
T: FromSql,
T: FromSql,
fn from_sql(
ty: &Type,
raw: &[u8]
) -> Result<Vec<T>, Box<dyn Error + 'static + Send + Sync>>
ty: &Type,
raw: &[u8]
) -> Result<Vec<T>, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl<T> FromSql for Option<T> where
T: FromSql,
T: FromSql,
fn from_sql(
ty: &Type,
raw: &[u8]
) -> Result<Option<T>, Box<dyn Error + 'static + Send + Sync>>
ty: &Type,
raw: &[u8]
) -> Result<Option<T>, Box<dyn Error + 'static + Send + Sync>>
fn from_sql_null(
&Type
) -> Result<Option<T>, Box<dyn Error + 'static + Send + Sync>>
&Type
) -> Result<Option<T>, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for i32
fn from_sql(
&Type,
raw: &[u8]
) -> Result<i32, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<i32, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for NaiveTime
fn from_sql(
&Type,
raw: &[u8]
) -> Result<NaiveTime, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<NaiveTime, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for i8
fn from_sql(
&Type,
raw: &[u8]
) -> Result<i8, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<i8, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for HashMap<String, Option<String>, RandomState>
fn from_sql(
&Type,
raw: &[u8]
) -> Result<HashMap<String, Option<String>, RandomState>, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<HashMap<String, Option<String>, RandomState>, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for DateTime<Local>
fn from_sql(
type_: &Type,
raw: &[u8]
) -> Result<DateTime<Local>, Box<dyn Error + 'static + Send + Sync>>
type_: &Type,
raw: &[u8]
) -> Result<DateTime<Local>, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for u32
fn from_sql(
&Type,
raw: &[u8]
) -> Result<u32, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<u32, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for i16
fn from_sql(
&Type,
raw: &[u8]
) -> Result<i16, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<i16, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for String
fn from_sql(
&Type,
raw: &[u8]
) -> Result<String, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<String, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for bool
fn from_sql(
&Type,
raw: &[u8]
) -> Result<bool, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<bool, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for NaiveDateTime
fn from_sql(
&Type,
raw: &[u8]
) -> Result<NaiveDateTime, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<NaiveDateTime, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for i64
fn from_sql(
&Type,
raw: &[u8]
) -> Result<i64, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<i64, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for NaiveDate
fn from_sql(
&Type,
raw: &[u8]
) -> Result<NaiveDate, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<NaiveDate, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for DateTime<FixedOffset>
fn from_sql(
type_: &Type,
raw: &[u8]
) -> Result<DateTime<FixedOffset>, Box<dyn Error + 'static + Send + Sync>>
type_: &Type,
raw: &[u8]
) -> Result<DateTime<FixedOffset>, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for f64
fn from_sql(
&Type,
raw: &[u8]
) -> Result<f64, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<f64, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for f32
fn from_sql(
&Type,
raw: &[u8]
) -> Result<f32, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<f32, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for Vec<u8>
fn from_sql(
&Type,
raw: &[u8]
) -> Result<Vec<u8>, Box<dyn Error + 'static + Send + Sync>>
&Type,
raw: &[u8]
) -> Result<Vec<u8>, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl FromSql for DateTime<Utc>
fn from_sql(
type_: &Type,
raw: &[u8]
) -> Result<DateTime<Utc>, Box<dyn Error + 'static + Send + Sync>>
type_: &Type,
raw: &[u8]
) -> Result<DateTime<Utc>, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
Implementors
impl<T> FromSql for Date<T> where
T: FromSql,
T: FromSql,
fn from_sql(
ty: &Type,
raw: &[u8]
) -> Result<Date<T>, Box<dyn Error + 'static + Send + Sync>>
ty: &Type,
raw: &[u8]
) -> Result<Date<T>, Box<dyn Error + 'static + Send + Sync>>
fn accepts(ty: &Type) -> bool
impl<T> FromSql for Timestamp<T> where
T: FromSql,
T: FromSql,