elastic 0.20.10

//! A basic typed example.
//!
//! NOTE: This sample expects you have a node running on `localhost:9200`.
//!
//! This sample does the following:
//!
//! - Check if a particular index exists
//! - Create the index if it doesn't
//! - Put the mapping for a document type
//! - Index a document
//! - Search the index and iterate over hits

#[macro_use]
extern crate elastic_derive;
extern crate env_logger;
extern crate serde;
#[macro_use]
extern crate serde_derive;
#[macro_use]
extern crate serde_json;

extern crate elastic;

use std::error::Error as StdError;
use elastic::error::{ApiError, Error};
use elastic::prelude::*;

#[derive(Debug, Serialize, Deserialize, ElasticType)]
struct MyType {
    id: i32,
    title: String,
    timestamp: Date<DefaultDateMapping>,
}

fn run() -> Result<(), Box<StdError>> {
    // A HTTP client and request parameters
    let client = SyncClientBuilder::new().build()?;

    // Create a document to index
    let doc = MyType {
        id: 1,
        title: String::from("A title"),
        timestamp: Date::now(),
    };

    // Check if the doc exists and index if it doesn't
    ensure_indexed(&client, doc)?;

    // Do a search request
    let res = search(&client, "title")?;

    println!("{:?}", res);

    Ok(())
}

fn sample_index() -> Index<'static> {
    Index::from("typed_sample_index")
}

fn ensure_indexed(client: &SyncClient, doc: MyType) -> Result<(), Error> {
    let get_res = client
        .document_get::<MyType>(sample_index(), id(doc.id))
        .send();

    match get_res.map(|res| res.into_document()) {
        // The doc was found: no need to index
        Ok(Some(doc)) => {
            println!("document already indexed: {:?}", doc);
        }
        // The index exists, but the doc wasn't found: map and index
        Ok(None) => {
            println!("indexing doc");

            put_doc(client, doc)?;
        }
        // No index: create it, then map and index
        Err(Error::Api(ApiError::IndexNotFound { .. })) => {
            println!("creating index and doc");

            put_index(client)?;
            put_doc(client, doc)?;
        }
        // Something went wrong: panic
        Err(e) => Err(e)?,
    }

    Ok(())
}

fn put_index(client: &SyncClient) -> Result<(), Error> {
    client.index_create(sample_index()).send()?;
    client
        .document_put_mapping::<MyType>(sample_index())
        .send()?;

    Ok(())
}

fn put_doc(client: &SyncClient, doc: MyType) -> Result<(), Error> {
    client
        .document_index(sample_index(), id(doc.id), doc)
        .params(|p| p.url_param("refresh", true))
        .send()?;

    Ok(())
}

fn search(client: &SyncClient, query: &'static str) -> Result<SearchResponse<MyType>, Error> {
    client
        .search()
        .index(sample_index())
        .body(json!({
                "query": {
                    "query_string": {
                        "query": query
                    }
                }
          }))
        .send()
}

fn main() {
    env_logger::init().unwrap();
    run().unwrap()
}