Struct Deserializer

pub struct Deserializer<'a> { /* private fields */ }

A structure that deserialize Postgres rows into Rust values.

Implementations

impl<'a> Deserializer<'a>

pub fn from_row(input: &'a Row) -> Self

Create a Row deserializer from a Row.

Trait Implementations

impl<'de, 'a, 'b> Deserializer<'de> for &'b mut Deserializer<'a>

type Error = DeError

The error type that can be returned if some error occurs during deserialization.

fn deserialize_any<V: Visitor<'de>>(self, _: V) -> DeResult<V::Value>

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input.

fn deserialize_u8<V: Visitor<'de>>(self, _: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a u8 value.

fn deserialize_u16<V: Visitor<'de>>(self, _: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a u16 value.

fn deserialize_u64<V: Visitor<'de>>(self, _: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a u64 value.

fn deserialize_char<V: Visitor<'de>>(self, _: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a char value.

fn deserialize_unit<V: Visitor<'de>>(self, _: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a unit value.

fn deserialize_identifier<V: Visitor<'de>>(self, _: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant.

fn deserialize_ignored_any<V: Visitor<'de>>( self, visitor: V, ) -> DeResult<V::Value>

Hint that the Deserialize type needs to deserialize a value whose type doesn’t matter because it is ignored.

fn deserialize_bool<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a bool value.

fn deserialize_i8<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting an i8 value.

fn deserialize_i16<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting an i16 value.

fn deserialize_i32<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting an i32 value.

fn deserialize_i64<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting an i64 value.

fn deserialize_u32<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a u32 value.

fn deserialize_f32<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a f32 value.

fn deserialize_f64<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a f64 value.

fn deserialize_str<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer.

fn deserialize_string<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer.

fn deserialize_bytes<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer.

fn deserialize_byte_buf<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer.

fn deserialize_option<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting an optional value.

fn deserialize_seq<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a sequence of values.

fn deserialize_enum<V: Visitor<'de>>( self, _: &str, _: &[&str], _visitor: V, ) -> DeResult<V::Value>

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants.

fn deserialize_unit_struct<V: Visitor<'de>>( self, _: &str, _: V, ) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a unit struct with a particular name.

fn deserialize_newtype_struct<V: Visitor<'de>>( self, _: &str, _: V, ) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a newtype struct with a particular name.

fn deserialize_tuple<V: Visitor<'de>>( self, _: usize, _: V, ) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data.

fn deserialize_tuple_struct<V: Visitor<'de>>( self, _: &str, _: usize, _: V, ) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields.

fn deserialize_map<V: Visitor<'de>>(self, visitor: V) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a map of key-value pairs.

fn deserialize_struct<V: Visitor<'de>>( self, _: &'static str, _: &'static [&'static str], v: V, ) -> DeResult<V::Value>

Hint that the Deserialize type is expecting a struct with a particular name and fields.

fn deserialize_i128<V>( self, visitor: V, ) -> Result<<V as Visitor<'de>>::Value, Self::Error>

where V: Visitor<'de>,

Hint that the Deserialize type is expecting an i128 value.

fn deserialize_u128<V>( self, visitor: V, ) -> Result<<V as Visitor<'de>>::Value, Self::Error>

where V: Visitor<'de>,

Hint that the Deserialize type is expecting an u128 value.

fn is_human_readable(&self) -> bool

Determine whether Deserialize implementations should expect to deserialize their human-readable form.

impl<'de, 'a> MapAccess<'de> for Deserializer<'a>

type Error = DeError

The error type that can be returned if some error occurs during deserialization.

fn next_key_seed<T: DeserializeSeed<'de>>( &mut self, seed: T, ) -> DeResult<Option<T::Value>>

This returns Ok(Some(key)) for the next key in the map, or Ok(None) if there are no more remaining entries.

fn next_value_seed<T: DeserializeSeed<'de>>( &mut self, seed: T, ) -> DeResult<T::Value>

This returns a Ok(value) for the next value in the map.

fn next_entry_seed<K, V>( &mut self, kseed: K, vseed: V, ) -> Result<Option<(<K as DeserializeSeed<'de>>::Value, <V as DeserializeSeed<'de>>::Value)>, Self::Error>

where K: DeserializeSeed<'de>, V: DeserializeSeed<'de>,

This returns Ok(Some((key, value))) for the next (key-value) pair in the map, or Ok(None) if there are no more remaining items.

fn next_key<K>(&mut self) -> Result<Option<K>, Self::Error>

where K: Deserialize<'de>,

This returns Ok(Some(key)) for the next key in the map, or Ok(None) if there are no more remaining entries.

fn next_value<V>(&mut self) -> Result<V, Self::Error>

where V: Deserialize<'de>,

This returns a Ok(value) for the next value in the map.

fn next_entry<K, V>(&mut self) -> Result<Option<(K, V)>, Self::Error>

where K: Deserialize<'de>, V: Deserialize<'de>,

This returns Ok(Some((key, value))) for the next (key-value) pair in the map, or Ok(None) if there are no more remaining items.

fn size_hint(&self) -> Option<usize>

Returns the number of entries remaining in the map, if known.