-import asyncio
-import datasette
-from datasette.app import connections
-from datasette.inspect import inspect_hash
-from datasette.utils import Results
-from pathlib import Path
+import threading
import sqlite3
+import datasette.views.base
+from datasette.database import Database
-from . import connectors
+from .connectors import ConnectorList
+
+connections = threading.local()
def patch_datasette():
Monkey patching for original Datasette
"""
- def inspect(self):
- " Inspect the database and return a dictionary of table metadata "
- if self._inspect:
- return self._inspect
-
- _inspect = {}
- files = self.files
-
- for filename in files:
- self.files = (filename,)
- path = Path(filename)
- name = path.stem
- if name in _inspect:
- raise Exception("Multiple files with the same stem %s" % name)
- try:
- _inspect[name] = self.original_inspect()[name]
- except sqlite3.DatabaseError:
- tables, views, dbtype = connectors.inspect(path)
- _inspect[name] = {
- "hash": inspect_hash(path),
- "file": str(path),
- "dbtype": dbtype,
- "tables": tables,
- "views": views,
- }
-
- self.files = files
- self._inspect = _inspect
- return self._inspect
-
- datasette.app.Datasette.original_inspect = datasette.app.Datasette.inspect
- datasette.app.Datasette.inspect = inspect
-
-
- async def execute(self, db_name, sql, params=None, truncate=False, custom_time_limit=None, page_size=None):
- """Executes sql against db_name in a thread"""
- page_size = page_size or self.page_size
-
- def is_sqlite3_conn():
- conn = getattr(connections, db_name, None)
- if not conn:
- info = self.inspect()[db_name]
- return info.get('dbtype', 'sqlite3') == 'sqlite3'
- else:
- return isinstance(conn, sqlite3.Connection)
-
- def sql_operation_in_thread():
- conn = getattr(connections, db_name, None)
- if not conn:
- info = self.inspect()[db_name]
- conn = connectors.connect(info['file'], info['dbtype'])
- setattr(connections, db_name, conn)
-
- rows, truncated, description = conn.execute(
- sql,
- params or {},
- truncate=truncate,
- page_size=page_size,
- max_returned_rows=self.max_returned_rows,
- )
- return Results(rows, truncated, description)
-
- if is_sqlite3_conn():
- return await self.original_execute(db_name, sql, params=params, truncate=truncate, custom_time_limit=custom_time_limit, page_size=page_size)
- else:
- return await asyncio.get_event_loop().run_in_executor(
- self.executor, sql_operation_in_thread
- )
-
- datasette.app.Datasette.original_execute = datasette.app.Datasette.execute
- datasette.app.Datasette.execute = execute
+ async def table_names(self):
+ try:
+ return await self.original_table_names()
+ except sqlite3.DatabaseError:
+ return ConnectorList.table_names(self.path)
+
+ Database.original_table_names = Database.table_names
+ Database.table_names = table_names
+
+
+ async def hidden_table_names(self):
+ try:
+ return await self.original_hidden_table_names()
+ except sqlite3.DatabaseError:
+ return ConnectorList.hidden_table_names(self.path)
+
+ Database.original_hidden_table_names = Database.hidden_table_names
+ Database.hidden_table_names = hidden_table_names
+
+
+ async def view_names(self):
+ try:
+ return await self.original_view_names()
+ except sqlite3.DatabaseError:
+ return ConnectorList.view_names(self.path)
+
+ Database.original_view_names = Database.view_names
+ Database.view_names = view_names
+
+
+ async def table_columns(self, table):
+ try:
+ return await self.original_table_columns(table)
+ except sqlite3.DatabaseError:
+ return ConnectorList.table_columns(self.path, table)
+
+ Database.original_table_columns = Database.table_columns
+ Database.table_columns = table_columns
+
+
+ async def primary_keys(self, table):
+ try:
+ return await self.original_primary_keys(table)
+ except sqlite3.DatabaseError:
+ return ConnectorList.primary_keys(self.path, table)
+
+ Database.original_primary_keys = Database.primary_keys
+ Database.primary_keys = primary_keys
+
+
+ async def fts_table(self, table):
+ try:
+ return await self.original_fts_table(table)
+ except sqlite3.DatabaseError:
+ return ConnectorList.fts_table(self.path, table)
+
+ Database.original_fts_table = Database.fts_table
+ Database.fts_table = fts_table
+
+
+ async def get_all_foreign_keys(self):
+ try:
+ return await self.original_get_all_foreign_keys()
+ except sqlite3.DatabaseError:
+ return ConnectorList.get_all_foreign_keys(self.path)
+
+ Database.original_get_all_foreign_keys = Database.get_all_foreign_keys
+ Database.get_all_foreign_keys = get_all_foreign_keys
+
+
+ async def table_counts(self, *args, **kwargs):
+ counts = await self.original_table_counts(**kwargs)
+ # If all tables has None as counts, an error had ocurred
+ if len(list(filter(lambda table_count: table_count is not None, counts.values()))) == 0:
+ return ConnectorList.table_counts(self.path, *args, **kwargs)
+
+ Database.original_table_counts = Database.table_counts
+ Database.table_counts = table_counts
projects / datasette-connectors.git / blobdiff