def insert(self, collection, obj):
obj_id = self._make_id()
obj = create_storage_obj(collection, obj, obj_id)
collection_fn = self._get_file(collection)
try:
# Insert record into file
to_json(obj, filename=collection_fn)
return obj_id
except Exception as e:
raise error.InvalidSerialization(
f"Problem inserting object into collection: {e}, {obj!r}")
def insert(self, collection, obj):
obj_id = self._make_id()
obj = create_storage_obj(collection, obj, obj_id)
try:
obj = to_json(obj)
except Exception as e:
raise error.InvalidSerialization(
f"Problem inserting object into collection: {e}, {obj!r}")
with self.lock:
self.collections.setdefault(collection, {})[obj_id] = obj
return obj_id
def insert_current(self, collection, obj, store_permanently=True):
obj_id = self._make_id()
obj = create_storage_obj(collection, obj, obj_id)
try:
obj = to_json(obj)
except Exception as e:
raise error.InvalidSerialization(
f"Problem serializing object for insertion: {e} {obj!r}")
with self.lock:
self.current[collection] = obj
if store_permanently:
self.collections.setdefault(collection, {})[obj_id] = obj
return obj_id
def to_json(obj, filename=None, append=True, **kwargs):
"""Convert a Python object to a JSON string.
Will handle `datetime` objects as well as `astropy.unit.Quantity` objects.
Astropy quantities will be converted to a dict: `{"value": val, "unit": unit}`.
Examples:
.. doctest::
>>> from panoptes.utils.serializers import to_json
>>> from astropy import units as u
>>> config = { "name": "Mauna Loa", "elevation": 3397 * u.meter }
>>> to_json(config)
'{"name": "Mauna Loa", "elevation": "3397.0 m"}'
>>> to_json({"numpy_array": np.arange(10)})
'{"numpy_array": [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}'
>>> from panoptes.utils.time import current_time
>>> to_json({"current_time": current_time()}) # doctest: +SKIP
'{"current_time": "2019-04-08 22:19:28.402198"}'
Args:
obj (`object`): The object to be converted to JSON, usually a dict.
filename (`str`, optional): Path to file for saving.
append (`bool`, optional): Append to `filename`, default True. Setting
False will clobber the file.
**kwargs: Keyword arguments passed to `json.dumps`.
Returns:
`str`: The JSON string representation of the object.
"""
try:
json_str = json.dumps(obj, default=serialize_object, **kwargs)
except Exception as e:
raise error.InvalidSerialization(e)
if filename is not None:
mode = 'w'
if append:
mode = 'a'
with open(filename, mode) as fn:
fn.write(json_str + '\n')
return json_str
def insert_current(self, collection, obj, store_permanently=True):
obj_id = self._make_id()
obj = create_storage_obj(collection, obj, obj_id)
current_fn = self._get_file(collection, permanent=False)
result = obj_id
try:
# Overwrite current collection file with obj.
to_json(obj, filename=current_fn, append=False)
except Exception as e:
raise error.InvalidSerialization(
f"Problem serializing object for insertion: {e} {current_fn} {obj!r}"
)
if not store_permanently:
return result
else:
return self.insert(collection, obj)