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--crossdb option for joining across databases (#1232)

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* Test for cross-database join, refs #283
* Warn if --crossdb used with more than 10 DBs, refs #283
* latest.datasette.io demo of --crossdb joins, refs #283
* Show attached databases on /_memory page, refs #283
* Documentation for cross-database queries, refs #283
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Simon Willison 2021-02-18 14:09:12 -08:00 • committed by GitHub
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13 changed files with 215 additions and 8 deletions
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11
tests/test_internals_database.py
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@ -4,7 +4,7 @@ Tests for the datasette.database.Database class
from datasette.database import Database, Results, MultipleValues
from datasette.utils.sqlite import sqlite3, supports_generated_columns
from datasette.utils import Column
from .fixtures import app_client
from .fixtures import app_client, app_client_two_attached_databases_crossdb_enabled
import pytest
import time
import uuid
@ -466,6 +466,15 @@ def test_is_mutable(app_client):
assert Database(app_client.ds, is_memory=True, is_mutable=False).is_mutable is False
@pytest.mark.asyncio
async def test_attached_databases(app_client_two_attached_databases_crossdb_enabled):
database = app_client_two_attached_databases_crossdb_enabled.ds.get_database(
"_memory"
)
attached = await database.attached_databases()
assert {a.name for a in attached} == {"extra database", "fixtures"}
@pytest.mark.asyncio
async def test_database_memory_name(app_client):
ds = app_client.ds