Trait mouscache::FromValue

pub trait FromValue {
    fn from_redis_value(v: &Value) -> Result<Self, RedisError>;

    fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError> { ... }
}

This trait is used to convert a redis value into a more appropriate type. While a redis Value can represent any response that comes back from the redis server, usually you want to map this into something that works better in rust. For instance you might want to convert the return value into a String or an integer.

This trait is well supported throughout the library and you can implement it for your own types if you want.

In addition to what you can see from the docs, this is also implemented for tuples up to size 12 and for Vec.

Required methods

fn from_redis_value(v: &Value) -> Result<Self, RedisError>

Given a redis Value this attempts to convert it into the given destination type. If that fails because it's not compatible an appropriate error is generated.

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Provided methods

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

Similar to from_redis_value but constructs a vector of objects from another vector of values. This primarily exists internally to customize the behavior for vectors of tuples.

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Implementations on Foreign Types

impl FromRedisValue for u64

fn from_redis_value(v: &Value) -> Result<u64, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for bool

fn from_redis_value(v: &Value) -> Result<bool, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for isize

fn from_redis_value(v: &Value) -> Result<isize, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl<T> FromRedisValue for Vec<T> where
    T: FromRedisValue, 

fn from_redis_value(v: &Value) -> Result<Vec<T>, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for f32

fn from_redis_value(v: &Value) -> Result<f32, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for i8

fn from_redis_value(v: &Value) -> Result<i8, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl<K, V, S> FromRedisValue for HashMap<K, V, S> where
    K: FromRedisValue + Eq + Hash,
    S: Default + BuildHasher,
    V: FromRedisValue, 

fn from_redis_value(v: &Value) -> Result<HashMap<K, V, S>, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for u8

fn from_redis_value(v: &Value) -> Result<u8, RedisError>

fn from_byte_vec(vec: &[u8]) -> Option<Vec<u8>>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for i64

fn from_redis_value(v: &Value) -> Result<i64, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for usize

fn from_redis_value(v: &Value) -> Result<usize, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl<T, S> FromRedisValue for HashSet<T, S> where
    S: Default + BuildHasher,
    T: FromRedisValue + Eq + Hash, 

fn from_redis_value(v: &Value) -> Result<HashSet<T, S>, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for f64

fn from_redis_value(v: &Value) -> Result<f64, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl<T> FromRedisValue for BTreeSet<T> where
    T: FromRedisValue + Eq + Hash + Ord, 

fn from_redis_value(v: &Value) -> Result<BTreeSet<T>, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for String

fn from_redis_value(v: &Value) -> Result<String, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for u16

fn from_redis_value(v: &Value) -> Result<u16, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for i32

fn from_redis_value(v: &Value) -> Result<i32, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for InfoDict

fn from_redis_value(v: &Value) -> Result<InfoDict, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl<T> FromRedisValue for Option<T> where
    T: FromRedisValue, 

fn from_redis_value(v: &Value) -> Result<Option<T>, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for i16

fn from_redis_value(v: &Value) -> Result<i16, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for ()

fn from_redis_value(_v: &Value) -> Result<(), RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl FromRedisValue for u32

fn from_redis_value(v: &Value) -> Result<u32, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

impl<K, V> FromRedisValue for BTreeMap<K, V> where
    K: FromRedisValue + Eq + Hash + Ord,
    V: FromRedisValue, 

fn from_redis_value(v: &Value) -> Result<BTreeMap<K, V>, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

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Implementors

impl FromRedisValue for Value

fn from_redis_value(v: &Value) -> Result<Value, RedisError>

fn from_redis_values(items: &[Value]) -> Result<Vec<Self>, RedisError>

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