{"id": 1931794126, "node_id": "I_kwDOBm6k_c5zJNbO", "number": 2198, "title": "--load-extension=spatialite not working with Windows", "user": {"value": 363004, "label": "hcarter333"}, "state": "open", "locked": 0, "assignee": null, "milestone": null, "comments": 0, "created_at": "2023-10-08T12:50:22Z", "updated_at": "2023-10-08T12:50:22Z", "closed_at": null, "author_association": "NONE", "pull_request": null, "body": "Using each of\r\n`python -m datasette counties.db -m metadata.yml --load-extension=SpatiaLite`\r\n\r\nand \r\n\r\n`python -m datasette counties.db --load-extension=\"C:\\Windows\\System32\\mod_spatialite.dll\"`\r\n\r\nand\r\n\r\n`python -m datasette counties.db --load-extension=C:\\Windows\\System32\\mod_spatialite.dll`\r\n\r\nI got the error:\r\n\r\n```\r\n  File \"C:\\Users\\m3n7es\\AppData\\Local\\Packages\\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\\LocalCache\\local-packages\\Python311\\site-packages\\datasette\\database.py\", line 209, in in_thread\r\n    self.ds._prepare_connection(conn, self.name)\r\n  File \"C:\\Users\\m3n7es\\AppData\\Local\\Packages\\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\\LocalCache\\local-packages\\Python311\\site-packages\\datasette\\app.py\", line 596, in _prepare_connection\r\n    conn.execute(\"SELECT load_extension(?, ?)\", [path, entrypoint])\r\nsqlite3.OperationalError: The specified module could not be found.\r\n\r\n```\r\n\r\nI finally tried modifying the code in app.py to read:\r\n\r\n```\r\n    def _prepare_connection(self, conn, database):\r\n        conn.row_factory = sqlite3.Row\r\n        conn.text_factory = lambda x: str(x, \"utf-8\", \"replace\")\r\n        if self.sqlite_extensions:\r\n            conn.enable_load_extension(True)\r\n            for extension in self.sqlite_extensions:\r\n                # \"extension\" is either a string path to the extension\r\n                # or a 2-item tuple that specifies which entrypoint to load.\r\n                #if isinstance(extension, tuple):\r\n                #    path, entrypoint = extension\r\n                #    conn.execute(\"SELECT load_extension(?, ?)\", [path, entrypoint])\r\n                #else:\r\n                conn.execute(\"SELECT load_extension('C:\\Windows\\System32\\mod_spatialite.dll')\")\r\n\r\n```\r\nAt which point the counties example worked. \r\n\r\nIs there a correct way to install/use the extension on Windows? My method will cause issues if there's a second extension to be used.\r\n\r\nOn an unrelated note, my next step is to figure out how to write a query across the two loaded databases supplied from the command line:\r\n`python -m datasette rm_toucans_23_10_07.db counties.db -m metadata.yml --load-extension=SpatiaLite`\r\n\r\n\r\n\r\n", "repo": {"value": 107914493, "label": "datasette"}, "type": "issue", "active_lock_reason": null, "performed_via_github_app": null, "reactions": "{\"url\": \"https://api.github.com/repos/simonw/datasette/issues/2198/reactions\", \"total_count\": 0, \"+1\": 0, \"-1\": 0, \"laugh\": 0, \"hooray\": 0, \"confused\": 0, \"heart\": 0, \"rocket\": 0, \"eyes\": 0}", "draft": null, "state_reason": null}