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Allow overwriting a model that is open in QGIS #1881

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Oct 8, 2024
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Allow overwriting a model that is open in QGIS #1881

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10 changes: 9 additions & 1 deletion python/ribasim/ribasim/model.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
import datetime
import logging
import shutil
from collections.abc import Generator
from os import PathLike
from pathlib import Path
Expand Down Expand Up @@ -190,7 +191,12 @@ def _write_toml(self, fn: Path) -> Path:
return fn

def _save(self, directory: DirectoryPath, input_dir: DirectoryPath):
db_path = directory / input_dir / "database.gpkg"
# We write all tables to a temporary GeoPackage with a dot prefix,
# and at the end move this over the target file.
# This does not throw a PermissionError if the file is open in QGIS.
db_path = directory / input_dir / ".database.gpkg"

# avoid adding tables to existing model
db_path.parent.mkdir(parents=True, exist_ok=True)
db_path.unlink(missing_ok=True)
context_file_writing.get()["database"] = db_path
Expand All @@ -207,6 +213,8 @@ def _save(self, directory: DirectoryPath, input_dir: DirectoryPath):
for sub in self._nodes():
sub._save(directory, input_dir)

shutil.move(db_path, db_path.with_name("database.gpkg"))

def set_crs(self, crs: str) -> None:
"""Set the coordinate reference system of the data in the model.
Expand Down
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