diff --git a/CHANGELOG.md b/CHANGELOG.md
index b1552ddc..13997d19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,26 +2,38 @@
 
 Log of changes in the versions
 
+## v0.12.2
+
+- bugfix requirements
+- add `$exist` `find()`-methods inside of HDF files
+- bugfix 0D time data as dimension
+- module query functions (`find`, ...) can guess the filename from objects that have with `hasattr(hdf_filename, 'hdf_filename')`
+
 ## v0.12.1
+
 - bugfix in zenodo search (did Zenodo change their API?)
 
 ## v0.12.0
+
 - 0D data is written to MongoDB
-- new utils like computing filesize 
+- new utils like computing filesize
 - update to new zenodo_search package due to change in backend at Zenodo.org
 - `find`, `find_one` and `distinct` can be called on HDF files
 - small bugfixes
 
 ## v0.11.1
+
 - bugfix standard attribute validation
 - bugfix in `EngMeta.ipynb`
 
 ## v0.11.0
+
 - working with time data is now possible:
-  - time data can be created using the high-level method `create_time_dataset`
-  - slicing the above "time datasets" will return xarray data
-  - See `docs/wrapper/Misc.ipynb`
+    - time data can be created using the high-level method `create_time_dataset`
+    - slicing the above "time datasets" will return xarray data
+    - See `docs/wrapper/Misc.ipynb`
 - fixed issue with user-defined & nested standard attributes
 
 ## v0.10.0
+
 - Initial version, published on `pypi`
\ No newline at end of file
diff --git a/h5rdmtoolbox/__init__.py b/h5rdmtoolbox/__init__.py
index 40bb45df..dbf3b092 100644
--- a/h5rdmtoolbox/__init__.py
+++ b/h5rdmtoolbox/__init__.py
@@ -1,12 +1,11 @@
 """h5rdtoolbox repository"""
 import atexit
 import pathlib
-import shutil
-from typing import Union, Callable
-
 # noinspection PyUnresolvedReferences
 import pint_xarray
+import shutil
 import xarray as xr
+from typing import Union, Callable
 
 from h5rdmtoolbox._cfg import set_config, get_config, get_ureg
 
@@ -68,16 +67,33 @@ def __new__(cls, path, rec=False, **kwargs):
         return database.File(path, **kwargs)
 
 
+def guess_filename(func):
+    """wrapper to guess the filename from the first argument"""
+
+    def wrapper(hdf_filename, *args, **kwargs):
+        if not isinstance(hdf_filename, (str, pathlib.Path)):
+            if hasattr(hdf_filename, 'hdf_filename'):
+                hdf_filename = hdf_filename.hdf_filename
+            else:
+                raise TypeError(f'Expected str or pathlib.Path, got {type(hdf_filename)}')
+        return func(hdf_filename, *args, **kwargs)
+
+    return wrapper
+
+
+@guess_filename
 def find(hdf_filename, *args, **kwargs):
     """Opens file with `FileDB` and calls `find()` on the root group"""
     return FileDB(hdf_filename).find(*args, **kwargs)
 
 
+@guess_filename
 def find_one(hdf_filename, *args, **kwargs):
     """Opens file with `FileDB` and calls `find_one()` on the root group"""
     return FileDB(hdf_filename).find_one(*args, **kwargs)
 
 
+@guess_filename
 def distinct(hdf_filename, key, objfilter=None):
     """Opens file and calls `distinct()` on the root group"""
     with File(hdf_filename) as h5: