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index: Change the index format.

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Tantivy allows search results to be ordered by arbitrary index fields as
long as they are a fast field and have the FastValue trait implemented.
This trait is only for u64 and i64 fields implemented.

To order the the search results by recency we need to add a unsigned
field that stores the server timestamp of the message.
This commit is contained in:
Damir Jelić 2019-06-10 15:56:05 +02:00
parent 818db73a48
commit 88dbd2000a
1 changed files with 8 additions and 4 deletions
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12
pantalaimon/index.py
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@ -84,12 +84,15 @@ class Index:
self.name_field = schema_builder.add_text_field("name")
self.topic_field = schema_builder.add_text_field("topic")
self.timestamp_field = schema_builder.add_date_field(
self.timestamp_field = schema_builder.add_unsigned_field(
"server_timestamp"
)
self.date_field = schema_builder.add_date_field(
"message_date"
)
self.room_field = schema_builder.add_facet_field("room")
self.column_field = schema_builder.add_integer_field(
self.column_field = schema_builder.add_unsigned_field(
"database_column",
indexed=True,
stored=True,
@ -110,12 +113,13 @@ class Index:
room_facet = tantivy.Facet.from_string(room_path)
doc.add_integer(self.column_field, column_id)
doc.add_unsigned(self.column_field, column_id)
doc.add_facet(self.room_field, room_facet)
doc.add_date(
self.timestamp_field,
self.date_field,
datetime.datetime.fromtimestamp(event.server_timestamp / 1000)
)
doc.add_unsigned(self.timestamp_field, event.server_timestamp)
if isinstance(event, RoomMessageText):
doc.add_text(self.body_field, event.body)