mirror of
https://github.com/meilisearch/meilisearch.git
synced 2024-12-02 10:05:05 +08:00
580 lines
20 KiB
Rust
580 lines
20 KiB
Rust
use std::io::{self, Write};
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use grenad::{CompressionType, WriterBuilder};
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use serde::de::Deserializer;
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use serde_json::{to_writer, Value};
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use super::{DocumentsBatchIndex, Error, DOCUMENTS_BATCH_INDEX_KEY};
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use crate::documents::serde_impl::DocumentVisitor;
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use crate::Object;
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/// The `DocumentsBatchBuilder` provides a way to build a documents batch in the intermediary
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/// format used by milli.
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///
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/// The writer used by the `DocumentsBatchBuilder` can be read using a `DocumentsBatchReader`
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/// to iterate over the documents.
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///
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/// ## example:
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/// ```
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/// use serde_json::json;
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/// use milli::documents::DocumentsBatchBuilder;
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///
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/// let json = json!({ "id": 1, "name": "foo" });
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///
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/// let mut builder = DocumentsBatchBuilder::new(Vec::new());
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/// builder.append_json_object(json.as_object().unwrap()).unwrap();
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/// let _vector = builder.into_inner().unwrap();
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/// ```
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pub struct DocumentsBatchBuilder<W> {
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/// The inner grenad writer, the last value must always be the `DocumentsBatchIndex`.
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writer: grenad::Writer<W>,
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/// A map that creates the relation between field ids and field names.
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fields_index: DocumentsBatchIndex,
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/// The number of documents that were added to this builder,
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/// it doesn't take the primary key of the documents into account at this point.
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documents_count: u32,
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/// A buffer to store a temporary obkv buffer and avoid reallocating.
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obkv_buffer: Vec<u8>,
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/// A buffer to serialize the values and avoid reallocating,
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/// serialized values are stored in an obkv.
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value_buffer: Vec<u8>,
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}
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impl<W: Write> DocumentsBatchBuilder<W> {
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pub fn new(writer: W) -> DocumentsBatchBuilder<W> {
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DocumentsBatchBuilder {
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writer: WriterBuilder::new().compression_type(CompressionType::None).build(writer),
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fields_index: DocumentsBatchIndex::default(),
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documents_count: 0,
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obkv_buffer: Vec::new(),
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value_buffer: Vec::new(),
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}
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}
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/// Returns the number of documents inserted into this builder.
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pub fn documents_count(&self) -> u32 {
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self.documents_count
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}
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/// Appends a new JSON object into the batch and updates the `DocumentsBatchIndex` accordingly.
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pub fn append_json_object(&mut self, object: &Object) -> io::Result<()> {
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// Make sure that we insert the fields ids in order as the obkv writer has this requirement.
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let mut fields_ids: Vec<_> = object.keys().map(|k| self.fields_index.insert(k)).collect();
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fields_ids.sort_unstable();
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self.obkv_buffer.clear();
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let mut writer = obkv::KvWriter::new(&mut self.obkv_buffer);
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for field_id in fields_ids {
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let key = self.fields_index.name(field_id).unwrap();
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self.value_buffer.clear();
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to_writer(&mut self.value_buffer, &object[key])?;
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writer.insert(field_id, &self.value_buffer)?;
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}
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let internal_id = self.documents_count.to_be_bytes();
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let document_bytes = writer.into_inner()?;
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self.writer.insert(internal_id, &document_bytes)?;
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self.documents_count += 1;
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Ok(())
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}
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/// Appends a new JSON array of objects into the batch and updates the `DocumentsBatchIndex` accordingly.
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pub fn append_json_array<R: io::Read>(&mut self, reader: R) -> Result<(), Error> {
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let mut de = serde_json::Deserializer::from_reader(reader);
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let mut visitor = DocumentVisitor::new(self);
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de.deserialize_any(&mut visitor)?
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}
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/// Appends a new CSV file into the batch and updates the `DocumentsBatchIndex` accordingly.
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pub fn append_csv<R: io::Read>(&mut self, mut reader: csv::Reader<R>) -> Result<(), Error> {
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// Make sure that we insert the fields ids in order as the obkv writer has this requirement.
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let mut typed_fields_ids: Vec<_> = reader
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.headers()?
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.into_iter()
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.map(parse_csv_header)
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.map(|(k, t)| (self.fields_index.insert(k), t))
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.enumerate()
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.collect();
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// Make sure that we insert the fields ids in order as the obkv writer has this requirement.
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typed_fields_ids.sort_unstable_by_key(|(_, (fid, _))| *fid);
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let mut record = csv::StringRecord::new();
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let mut line = 0;
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while reader.read_record(&mut record)? {
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// We increment here and not at the end of the while loop to take
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// the header offset into account.
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line += 1;
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self.obkv_buffer.clear();
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let mut writer = obkv::KvWriter::new(&mut self.obkv_buffer);
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for (i, (field_id, type_)) in typed_fields_ids.iter() {
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self.value_buffer.clear();
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let value = &record[*i];
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match type_ {
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AllowedType::Number => {
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if value.trim().is_empty() {
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to_writer(&mut self.value_buffer, &Value::Null)?;
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} else if let Ok(integer) = value.trim().parse::<i64>() {
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to_writer(&mut self.value_buffer, &integer)?;
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} else {
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match value.trim().parse::<f64>() {
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Ok(float) => {
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to_writer(&mut self.value_buffer, &float)?;
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}
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Err(error) => {
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return Err(Error::ParseFloat {
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error,
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line,
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value: value.to_string(),
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});
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}
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}
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}
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}
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AllowedType::String => {
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if value.is_empty() {
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to_writer(&mut self.value_buffer, &Value::Null)?;
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} else {
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to_writer(&mut self.value_buffer, value)?;
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}
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}
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}
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// We insert into the obkv writer the value buffer that has been filled just above.
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writer.insert(*field_id, &self.value_buffer)?;
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}
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let internal_id = self.documents_count.to_be_bytes();
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let document_bytes = writer.into_inner()?;
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self.writer.insert(internal_id, &document_bytes)?;
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self.documents_count += 1;
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}
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Ok(())
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}
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/// Flushes the content on disk and stores the final version of the `DocumentsBatchIndex`.
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pub fn into_inner(mut self) -> io::Result<W> {
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let DocumentsBatchBuilder { mut writer, fields_index, .. } = self;
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// We serialize and insert the `DocumentsBatchIndex` as the last key of the grenad writer.
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self.value_buffer.clear();
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to_writer(&mut self.value_buffer, &fields_index)?;
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writer.insert(DOCUMENTS_BATCH_INDEX_KEY, &self.value_buffer)?;
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writer.into_inner()
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}
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}
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#[derive(Debug)]
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enum AllowedType {
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String,
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Number,
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}
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fn parse_csv_header(header: &str) -> (&str, AllowedType) {
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// if there are several separators we only split on the last one.
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match header.rsplit_once(':') {
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Some((field_name, field_type)) => match field_type {
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"string" => (field_name, AllowedType::String),
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"number" => (field_name, AllowedType::Number),
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// if the pattern isn't reconized, we keep the whole field.
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_otherwise => (header, AllowedType::String),
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},
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None => (header, AllowedType::String),
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}
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}
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#[cfg(test)]
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mod test {
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use std::io::Cursor;
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use serde_json::json;
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use super::*;
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use crate::documents::{obkv_to_object, DocumentsBatchReader};
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#[test]
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fn add_single_documents_json() {
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let json = serde_json::json!({
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"id": 1,
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"field": "hello!",
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});
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_json_object(json.as_object().unwrap()).unwrap();
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let json = serde_json::json!({
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"blabla": false,
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"field": "hello!",
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"id": 1,
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});
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builder.append_json_object(json.as_object().unwrap()).unwrap();
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assert_eq!(builder.documents_count(), 2);
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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assert_eq!(index.len(), 3);
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let document = cursor.next_document().unwrap().unwrap();
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assert_eq!(document.iter().count(), 2);
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let document = cursor.next_document().unwrap().unwrap();
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assert_eq!(document.iter().count(), 3);
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assert!(cursor.next_document().unwrap().is_none());
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}
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#[test]
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fn add_documents_csv() {
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let csv_content = "id:number,field:string\n1,hello!\n2,blabla";
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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assert_eq!(builder.documents_count(), 2);
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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assert_eq!(index.len(), 2);
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let document = cursor.next_document().unwrap().unwrap();
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assert_eq!(document.iter().count(), 2);
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let document = cursor.next_document().unwrap().unwrap();
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assert_eq!(document.iter().count(), 2);
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assert!(cursor.next_document().unwrap().is_none());
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}
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#[test]
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fn simple_csv_document() {
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let csv_content = r#"city,country,pop
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"Boston","United States","4628910""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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let doc = cursor.next_document().unwrap().unwrap();
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let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
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assert_eq!(
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val,
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json!({
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"city": "Boston",
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"country": "United States",
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"pop": "4628910",
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})
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);
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assert!(cursor.next_document().unwrap().is_none());
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}
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#[test]
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fn coma_in_field() {
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let csv_content = r#"city,country,pop
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"Boston","United, States","4628910""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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let doc = cursor.next_document().unwrap().unwrap();
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let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
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assert_eq!(
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val,
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json!({
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"city": "Boston",
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"country": "United, States",
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"pop": "4628910",
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})
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);
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}
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#[test]
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fn quote_in_field() {
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let csv_content = r#"city,country,pop
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"Boston","United"" States","4628910""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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let doc = cursor.next_document().unwrap().unwrap();
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let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
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assert_eq!(
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val,
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json!({
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"city": "Boston",
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"country": "United\" States",
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"pop": "4628910",
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})
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);
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}
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#[test]
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fn integer_in_field() {
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let csv_content = r#"city,country,pop:number
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"Boston","United States","4628910""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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let doc = cursor.next_document().unwrap().unwrap();
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let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
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assert_eq!(
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val,
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json!({
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"city": "Boston",
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"country": "United States",
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"pop": 4628910,
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})
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);
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}
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#[test]
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fn integer_as_id() {
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let csv_content = r#""id:number","title:string","comment:string"
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"1239","Pride and Prejudice","A great book""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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let doc = cursor.next_document().unwrap().unwrap();
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let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
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assert_eq!(
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val,
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json!({
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"id": 1239,
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"title": "Pride and Prejudice",
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"comment": "A great book",
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})
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);
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}
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#[test]
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fn float_in_field() {
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let csv_content = r#"city,country,pop:number
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"Boston","United States","4628910.01""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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let doc = cursor.next_document().unwrap().unwrap();
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let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
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assert_eq!(
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val,
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json!({
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"city": "Boston",
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"country": "United States",
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"pop": 4628910.01,
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})
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);
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}
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#[test]
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fn several_colon_in_header() {
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let csv_content = r#"city:love:string,country:state,pop
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"Boston","United States","4628910""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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let doc = cursor.next_document().unwrap().unwrap();
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let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
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assert_eq!(
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val,
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json!({
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"city:love": "Boston",
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"country:state": "United States",
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"pop": "4628910",
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})
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);
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}
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#[test]
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fn ending_by_colon_in_header() {
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let csv_content = r#"city:,country,pop
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"Boston","United States","4628910""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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let doc = cursor.next_document().unwrap().unwrap();
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let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
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assert_eq!(
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val,
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json!({
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"city:": "Boston",
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"country": "United States",
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"pop": "4628910",
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})
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);
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}
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#[test]
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fn starting_by_colon_in_header() {
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let csv_content = r#":city,country,pop
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"Boston","United States","4628910""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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let mut builder = DocumentsBatchBuilder::new(Vec::new());
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builder.append_csv(csv).unwrap();
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let vector = builder.into_inner().unwrap();
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let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
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.unwrap()
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.into_cursor_and_fields_index();
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let doc = cursor.next_document().unwrap().unwrap();
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let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
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assert_eq!(
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val,
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json!({
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":city": "Boston",
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"country": "United States",
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"pop": "4628910",
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})
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);
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}
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#[ignore]
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#[test]
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fn starting_by_colon_in_header2() {
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let csv_content = r#":string,country,pop
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"Boston","United States","4628910""#;
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let csv = csv::Reader::from_reader(Cursor::new(csv_content));
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|
|
let mut builder = DocumentsBatchBuilder::new(Vec::new());
|
|
builder.append_csv(csv).unwrap();
|
|
let vector = builder.into_inner().unwrap();
|
|
|
|
let (mut cursor, _) = DocumentsBatchReader::from_reader(Cursor::new(vector))
|
|
.unwrap()
|
|
.into_cursor_and_fields_index();
|
|
|
|
assert!(cursor.next_document().is_err());
|
|
}
|
|
|
|
#[test]
|
|
fn double_colon_in_header() {
|
|
let csv_content = r#"city::string,country,pop
|
|
"Boston","United States","4628910""#;
|
|
let csv = csv::Reader::from_reader(Cursor::new(csv_content));
|
|
|
|
let mut builder = DocumentsBatchBuilder::new(Vec::new());
|
|
builder.append_csv(csv).unwrap();
|
|
let vector = builder.into_inner().unwrap();
|
|
|
|
let (mut cursor, index) = DocumentsBatchReader::from_reader(Cursor::new(vector))
|
|
.unwrap()
|
|
.into_cursor_and_fields_index();
|
|
|
|
let doc = cursor.next_document().unwrap().unwrap();
|
|
let val = obkv_to_object(&doc, &index).map(Value::from).unwrap();
|
|
|
|
assert_eq!(
|
|
val,
|
|
json!({
|
|
"city:": "Boston",
|
|
"country": "United States",
|
|
"pop": "4628910",
|
|
})
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn bad_type_in_header() {
|
|
let csv_content = r#"city,country:number,pop
|
|
"Boston","United States","4628910""#;
|
|
let csv = csv::Reader::from_reader(Cursor::new(csv_content));
|
|
|
|
let mut builder = DocumentsBatchBuilder::new(Vec::new());
|
|
assert!(builder.append_csv(csv).is_err());
|
|
}
|
|
|
|
#[test]
|
|
fn bad_column_count1() {
|
|
let csv_content = r#"city,country,pop
|
|
"Boston","United States","4628910", "too much
|
|
let csv = csv::Reader::from_reader(Cursor::new(csv_content"#;
|
|
let csv = csv::Reader::from_reader(Cursor::new(csv_content));
|
|
|
|
let mut builder = DocumentsBatchBuilder::new(Vec::new());
|
|
assert!(builder.append_csv(csv).is_err());
|
|
}
|
|
|
|
#[test]
|
|
fn bad_column_count2() {
|
|
let csv_content = r#"city,country,pop
|
|
"Boston","United States""#;
|
|
let csv = csv::Reader::from_reader(Cursor::new(csv_content));
|
|
|
|
let mut builder = DocumentsBatchBuilder::new(Vec::new());
|
|
assert!(builder.append_csv(csv).is_err());
|
|
}
|
|
}
|