\u0000 cannot be converted to text in django/postgreSQl - django

Question

i have a project with django .on the host when i want to upload an image sometime error occurred(problem with specific images)! the below show how i resize uploaded images:
def save_files_to_media(request, is_public=False, klass=None, conversation=None):
from apps.file.models import File
fs = FileSystemStorage()
file_items = {}
for data_item in request.data:
file_match = re.search('^fileToUpload\[(\d+)\]$', data_item)
if file_match and file_match.groups():
item_index = file_match.groups()[0]
if item_index not in file_items:
file_items[item_index] = {}
file_items[item_index]['file_to_upload'] = request.data[data_item]
else:
optimize_match = re.search('^optimizeType\[(\d+)\]$', data_item)
if optimize_match and optimize_match.groups():
item_index = optimize_match.groups()[0]
if item_index not in file_items:
file_items[item_index] = {}
file_items[item_index]['optimize_type'] = request.data[data_item]
files = []
for file_item_key in file_items:
input_file = file_items[file_item_key]['file_to_upload']
# TODO: checking validation. if input_file.name is not exist
optimize_type = file_items[file_item_key].get('optimize_type')
file_uuid = str(uuid4())
if is_public:
orig_filename, file_ext = splitext(basename(input_file.name))
directory_name = join(settings.MEDIA_ROOT, file_uuid)
filename = file_uuid + file_ext
else:
directory_name = join(settings.MEDIA_ROOT, file_uuid)
mkdir(directory_name)
filename = input_file.name
filepath = join(directory_name, filename)
fs.save(filepath, input_file)
is_optimized = False
if optimize_type == 'image':
is_success, filepath = image_optimizer(filepath)
filename = basename(filepath)
is_optimized = is_success
file_obj = File(
orig_name=filename,
uuid=file_uuid,
md5sum=get_md5sum(filepath),
filesize=get_filesize(filepath),
meta=get_meta_info(filepath),
is_optimized=is_optimized,
creator=request.user
)
if is_public:
file_obj.is_public = True
else:
file_obj.klass = klass
file_obj.conversation = conversation
file_obj.save()
files.append(file_obj)
return files
here is the error i got with some images:
unsupported Unicode escape sequence
LINE 1: ..., 'ada90ead20f7994837dced344266cc51', 145216, '', '{"FileTyp...
^
DETAIL: \u0000 cannot be converted to text.
CONTEXT: JSON data, line 1: ...ecTimeDigitized": 506779, "MakerNoteUnknownText":
its funny that in my local but not in host. for more information i must tell you guys my postgreSQL version is 11.3 and host postgreSQl is 9.5.17 . where you think is problem? as error it's seems for postgreSQL. thank you