diff --git a/my/arbtt.py b/my/arbtt.py
index ac1a4e3..b69848e 100644
--- a/my/arbtt.py
+++ b/my/arbtt.py
@@ -88,6 +88,20 @@ def entries() -> Iterable[Entry]:
                 yield Entry(json=json)
 
 
+def fill_influxdb() -> None:
+    from .core.influxdb import magic_fill
+    from .core.types import Freezer
+    freezer = Freezer(Entry)
+    fit = (freezer.freeze(e) for e in entries())
+    # TODO crap, influxdb doesn't like None https://github.com/influxdata/influxdb/issues/7722
+    # wonder if can check it statically/warn?
+    fit = (f for f in fit if f.active is not None)
+
+    # todo could tag with computer name or something...
+    # todo should probably also tag with 'program'?
+    magic_fill(fit, name=f'{entries.__module__}:{entries.__name__}')
+
+
 from .core import stat, Stats
 def stats() -> Stats:
     return stat(entries)
diff --git a/my/core/influxdb.py b/my/core/influxdb.py
index 3b2b850..96214c2 100644
--- a/my/core/influxdb.py
+++ b/my/core/influxdb.py
@@ -1,6 +1,8 @@
 '''
 TODO doesn't really belong to 'core' morally, but can think of moving out later
 '''
+from .common import assert_subpackage; assert_subpackage(__name__)
+
 from typing import Iterable, Any, Optional, Dict
 
 from .common import LazyLogger, asdict, Json
@@ -84,13 +86,17 @@ def fill(it: Iterable[Any], *, measurement: str, reset: bool=False, dt_col: str=
     # todo "Specify timestamp precision when writing to InfluxDB."?
 
 
-def magic_fill(it) -> None:
-    assert callable(it)
-    name = f'{it.__module__}:{it.__name__}'
+def magic_fill(it, *, name: Optional[str]=None) -> None:
+    if name is None:
+        assert callable(it) # generators have no name/module
+        name = f'{it.__module__}:{it.__name__}'
+    assert name is not None
+
+    if callable(it):
+        it = it()
 
     from itertools import tee
     from more_itertools import first, one
-    it = it()
     it, x = tee(it)
     f = first(x, default=None)
     if f is None:
diff --git a/my/core/types.py b/my/core/types.py
index ad42b7f..3bafa3d 100644
--- a/my/core/types.py
+++ b/my/core/types.py
@@ -66,6 +66,8 @@ def test_freezer() -> None:
 ###
 
 # TODO shit. what to do with exceptions?
+# e.g. good testcase is date parsing issue. should def yield Exception in this case
+# fundamentally it should just be Exception aware, dunno
 #
 # TODO not entirely sure if best to use Frozen as the schema, or actually convert objects..
 # guess need to experiment and see