MeiliSearch/examples/create-database.rs
2018-12-31 23:20:30 +01:00

84 lines
2.2 KiB
Rust

use std::path::{Path, PathBuf};
use std::error::Error;
use std::borrow::Cow;
use std::fs::File;
use hashbrown::HashMap;
use serde_derive::{Serialize, Deserialize};
use structopt::StructOpt;
use meilidb::database::{Database, Schema, UpdateBuilder};
use meilidb::tokenizer::DefaultBuilder;
#[derive(Debug, StructOpt)]
pub struct Opt {
/// The destination where the database must be created.
#[structopt(parse(from_os_str))]
pub database_path: PathBuf,
/// The csv file to index.
#[structopt(parse(from_os_str))]
pub csv_data_path: PathBuf,
/// The path to the schema.
#[structopt(long = "schema", parse(from_os_str))]
pub schema_path: PathBuf,
}
#[derive(Serialize, Deserialize)]
struct Document<'a> (
#[serde(borrow)]
HashMap<Cow<'a, str>, Cow<'a, str>>
);
fn index(schema: Schema, database_path: &Path, csv_data_path: &Path) -> Result<Database, Box<Error>> {
let database = Database::create(database_path, &schema)?;
println!("start indexing...");
let tokenizer_builder = DefaultBuilder::new();
let update_path = tempfile::NamedTempFile::new()?;
let mut update = UpdateBuilder::new(update_path.path().to_path_buf(), schema);
let mut rdr = csv::Reader::from_path(csv_data_path)?;
let mut raw_record = csv::StringRecord::new();
let headers = rdr.headers()?.clone();
while rdr.read_record(&mut raw_record)? {
let document: Document = match raw_record.deserialize(Some(&headers)) {
Ok(document) => document,
Err(e) => {
eprintln!("{:?}", e);
continue;
}
};
update.update_document(&document, &tokenizer_builder)?;
}
let update = update.build()?;
database.ingest_update_file(update)?;
Ok(database)
}
fn main() -> Result<(), Box<Error>> {
let opt = Opt::from_args();
let schema = {
let file = File::open(&opt.schema_path)?;
Schema::from_toml(file)?
};
let (elapsed, result) = elapsed::measure_time(|| {
index(schema, &opt.database_path, &opt.csv_data_path)
});
if let Err(e) = result {
return Err(e.into())
}
println!("database created in {} at: {:?}", elapsed, opt.database_path);
Ok(())
}