From fd9b166c856f6500a65725bc72cc2222fb8ebda3 Mon Sep 17 00:00:00 2001 From: "Jonathan M. Altman" Date: Tue, 15 Oct 2019 02:28:34 -0400 Subject: [PATCH] Initial cut of rust-db-play Testing out some thing on how Rust handles deserialization from db rows into JSON. --- .gitignore | 2 + Cargo.lock | 464 ++++++++++++++++++++++++++++++++++++++++++++++++++++ Cargo.toml | 16 ++ src/main.rs | 40 +++++ 4 files changed, 522 insertions(+) create mode 100644 .gitignore create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 src/main.rs diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..53eaa21 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +/target +**/*.rs.bk diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..f5a7268 --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,464 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "autocfg" +version = "0.1.6" +source = "registry+https://github.com/rust-lang/crates.io-index" + +[[package]] +name = "bitflags" +version = 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/dev/null +++ b/Cargo.toml @@ -0,0 +1,16 @@ +[package] +name = "rust-db-play" +version = "0.1.0" +authors = ["Jonathan M. Altman "] +edition = "2018" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +r2d2 = "0.8.5" +r2d2_sqlite = "0.12.0" +rusqlite = "0.20.0" +time = "0.1.42" +serde = "1.0.101" +serde_json = "1.0" +serde_rusqlite = "0.22.0" diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..46a2090 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,40 @@ +extern crate r2d2; +extern crate r2d2_sqlite; +extern crate rusqlite; + +use r2d2_sqlite::SqliteConnectionManager; +use rusqlite::params; +use serde_json::{Map, Value}; +use serde_rusqlite::*; + +fn main() -> Result<()> { + let manager = SqliteConnectionManager::memory(); //file(":memory:"); + let pool = r2d2::Pool::new(manager).unwrap(); + let conn = pool.get().unwrap(); + + conn.execute( + "CREATE TABLE person ( + id INTEGER PRIMARY KEY, + name TEXT NOT NULL, + time_created TEXT NOT NULL, + data BLOB + )", + params![], + )?; + + conn.execute( + "INSERT INTO person (name, time_created, data) + VALUES (?1, ?2, ?3)", + params!["Steven".to_string(), time::get_time(), None as Option>], + )?; + + let mut stmt = conn.prepare("SELECT id, name, time_created, data FROM person")?; + let perjson_iter = stmt.query_map(params![], |row| { + Ok(from_row::>(row).unwrap()) + })?; + + for perjson in perjson_iter { + println!("Found person {:?}", serde_json::to_string(&perjson.unwrap()).unwrap()); + } + Ok(()) +}