From 85d51ab2287337ea8540d1171b0cd60a8d25641a Mon Sep 17 00:00:00 2001 From: Kerollmops Date: Wed, 2 Dec 2020 10:30:28 +0100 Subject: [PATCH] Introduce an infos subcommand to export documents from an index --- src/subcommand/infos.rs | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/src/subcommand/infos.rs b/src/subcommand/infos.rs index f8138660b..1093c0f48 100644 --- a/src/subcommand/infos.rs +++ b/src/subcommand/infos.rs @@ -145,6 +145,11 @@ enum Command { output: PathBuf, }, + /// Outputs the documents as JSON lines to the standard output. + /// + /// All of the fields are extracted, not just the displayed ones. + ExportDocuments, + /// A command that patches the old external ids /// into the new external ids format. PatchToNewExternalIds, @@ -183,13 +188,14 @@ pub fn run(opt: Opt) -> anyhow::Result<()> { word_pair_proximities_docids(&index, &rtxn, !full_display, word1, word2) }, ExportWordsFst { output } => export_words_fst(&index, &rtxn, output), + ExportDocuments => export_documents(&index, &rtxn), PatchToNewExternalIds => { drop(rtxn); let mut wtxn = index.write_txn()?; let result = patch_to_new_external_ids(&index, &mut wtxn); wtxn.commit()?; result - } + }, } } @@ -489,6 +495,25 @@ fn export_words_fst(index: &Index, rtxn: &heed::RoTxn, output: PathBuf) -> anyho let words_fst = index.words_fst(rtxn)?; output.write_all(words_fst.as_fst().as_bytes())?; +fn export_documents(index: &Index, rtxn: &heed::RoTxn) -> anyhow::Result<()> { + use std::io::{BufWriter, Write as _}; + use crate::obkv_to_json; + + let stdout = io::stdout(); + let mut out = BufWriter::new(stdout); + + let fields_ids_map = index.fields_ids_map(rtxn)?; + let displayed_fields: Vec<_> = fields_ids_map.iter().map(|(id, _name)| id).collect(); + + for result in index.documents.iter(rtxn)? { + let (_id, obkv) = result?; + let document = obkv_to_json(&displayed_fields, &fields_ids_map, obkv)?; + serde_json::to_writer(&mut out, &document)?; + writeln!(&mut out)?; + } + + out.into_inner()?; + Ok(()) }