PickleDB

PickleDB is a lightweight and simple key-value store written in Rust, heavily inspired by Python's PickleDB

PickleDB is fun and easy to use

use pickledb::{PickleDb, PickleDbDumpPolicy, SerializationMethod};

fn main() {

    // create a new DB with AutoDump (meaning every change is written to the file)
    // and with Json serialization (meaning DB will be dumped to file as a Json object)
    let mut db = PickleDb::new("example.db", PickleDbDumpPolicy::AutoDump, SerializationMethod::Json);

    // set the value 100 to the key 'key1'
    db.set("key1", &100).unwrap();

    // print the value of key1
    println!("The value of key1 is: {}", db.get::<i32>("key1").unwrap());

    // load the DB from the same file
    let db2 = PickleDb::load("example.db", PickleDbDumpPolicy::DumpUponRequest, SerializationMethod::Json).unwrap();

    // print the value of key1
    println!("The value of key1 as loaded from file is: {}", db2.get::<i32>("key1").unwrap());
}

Installation

This crate works with Cargo and can be found in crates.io Add this to your Cargo.toml:

[dependencies]
pickledb = "0.5.1"

Documentation

All documentation for this crate can be found in docs.rs

Examples

There are currently two examples shipped with PickleDB:

• Hello World which shows the basic usage of PickleDB: create a new DB, load a DB from file, get/set key-value pairs of different types, and more
• Lists which shows how to use lists in PickleDB: create new lists, add/remove items from lists, retrieve items from lists, remove lists, and more

Changelog

Version 0.5.1

• Bugfix: Add missing JSON feature gate

Version 0.5.0

• Turn on/off file formats with features
• DumpUponRequest policy no longer dumps on Drop
• (internal) Switch CI from TravisCI to GitHub Actions

Version 0.4.1

• Bump up dependencies versions to fix vulnerabilities found in few of them

Version 0.4.0

• Changed all doc tests from ignore to no_run so generated docs don't contain untested warnings
• Changed both instances of lextend to take iterators of references rather than a slice of values
• Fixed bug in load_test()
• Fixed rustfmt and clippy warnings
• Added examples to Cargo.toml to allow them to be run via Cargo

Version 0.3.0

• Added new serialization options. Now PickleDB supports JSON, Bincode, YAML and CBOR serializations
• Added proper error handling (Issue #3)
• Use Path and PathBuf instead of strings to describe DB paths
• Better organization of the code

Version 0.2.0

• Dump the DB to file in a crash-safe manner using a temp file (Thanks jamwt from Reddit for the tip: https://www.reddit.com/r/rust/comments/agumun/check_out_pickledb_a_lightweight_and_simple/ee987j0)
• Extend lists became easier and multiple calls to lcreate(), ladd() and lextend() can be chained
• Added an iterator over keys and values in the DB
• Added an iterator over items in a list