elefant-tools 0.0.2

A library for doing things like pg_dump and pg_restore, with extra features, and probably more bugs.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

use crate::pg_interval::Interval;
use serde::de::{Error, Visitor};
use serde::{Deserialize, Deserializer, Serialize};
use std::fmt::Formatter;

impl Serialize for Interval {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        serializer.serialize_str(&self.to_postgres())
    }
}

impl<'de> Deserialize<'de> for Interval {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        deserializer.deserialize_str(IntervalVisitor)
    }
}

struct IntervalVisitor;

impl<'de> Visitor<'de> for IntervalVisitor {
    type Value = Interval;

    fn expecting(&self, formatter: &mut Formatter) -> std::fmt::Result {
        formatter.write_str("a string representing a Postgres interval")
    }

    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
    where
        E: Error,
    {
        match Interval::from_postgres(v) {
            Ok(interval) => Ok(interval),
            Err(e) => Err(Error::custom(format!(
                "Invalid Postgres interval string: {:?}",
                e
            ))),
        }
    }
}