Printing labels

[gpetrom]

Hi

First thanks for the wonderful program.
I have setup inventree with docker latest stable edition

Python paths:
Executable  /usr/local/bin/python
Environment /usr/local

Installation paths:
Base        /home/inventree
Config      /home/inventree/data/config.yaml
Media       /home/inventree/data/media
Static      /home/inventree/data/static

Versions:
Python      3.11.9
Django      4.2.17
InvenTree   0.17.5
API         294
Node        N/A
Yarn        N/A

In system information
Plugin support enabled
Server status healthy

The problem is with printing labels

I have installed brother plugin and it says that is enabled. When i go inside the plugin i am seeing
the following
Version: 1.0.0
Enabled: Yes
Path: /usr/local/lib/python3.11/site-packages/inventree_brother/brother_plugin.py
Builtin: No
Package: No

I have added a brother machine
Initialized: Yes
Active: yes
Status: Connected
Errors: No errors reported

Then i have added a simple custom template below the code

{% extends "label/label_base.html" %}

{% block style %}
<!-- You can write custom CSS here -->
<style>
    @page {
        height: 12mm;
        padding: 1mm;
    margin: 0px 0px 0px 0px;
    }

    .location {
        padding: 5px;
        font-weight: bold;
        font-family: Arial, Helvetica, sans-serif;
        height: 100%;
        vertical-align: middle;
        float: right;
        display: inline;
        font-size: 125%;
        position: absolute;
        top: 0mm;
        left: 23mm;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
</style>

{% endblock %}

{% block content %}
<div class='location'>
    {{ location.name }}
</div>
{% endblock %}

When i am trying to print a location i am getting the following error

Type:
PicklingError
Path:
InvenTree.offload_task
Info:
Can't pickle <class 'inventree_brother.brother_plugin.BrotherLabelPrinterDriver'>: it's not the same object as inventree_brother.brother_plugin.BrotherLabelPrinterDriver
When:
Feb. 3, 2025, 9:06 a.m.
Data:
Traceback (most recent call last):

File "/home/inventree/src/backend/InvenTree/InvenTree/tasks.py", line 208, in offload_task
task.run()

File "/root/.local/lib/python3.11/site-packages/django_q/tasks.py", line 730, in run
self.id = async_task(self.func, *self.args, **self.kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/root/.local/lib/python3.11/site-packages/django_q/tasks.py", line 71, in async_task
pack = SignedPackage.dumps(task)
^^^^^^^^^^^^^^^^^^^^^^^^^

File "/root/.local/lib/python3.11/site-packages/django_q/signing.py", line 16, in dumps
return signing.dumps(
^^^^^^^^^^^^^^

File "/root/.local/lib/python3.11/site-packages/django/core/signing.py", line 152, in dumps
return TimestampSigner(key=key, salt=salt).sign_object(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/root/.local/lib/python3.11/site-packages/django/core/signing.py", line 250, in sign_object
data = serializer().dumps(obj)
^^^^^^^^^^^^^^^^^^^^^^^

File "/root/.local/lib/python3.11/site-packages/django_q/signing.py", line 36, in dumps
return pickle.dumps(obj, protocol=pickle.HIGHEST_PROTOCOL)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

_pickle.PicklingError: Can't pickle <class 'inventree_brother.brother_plugin.BrotherLabelPrinterDriver'>: it's not the same object as inventree_brother.brother_plugin.BrotherLabelPrinterDriver

Any ideas why is this happening what am i missing

One more question maybe it is related
When i am trying to print for example a report in pdf i am always redirected to the home page show me the parts but it does not generates any pdf.

Thanks in advanced

[SchrodingersGat]

@wolflu05 was this the same error you were seeing?

[wolflu05]

@SchrodingersGat not sure, haven't seen this exact one before.

@gpetrom are you using the redis cache?

[gpetrom]

First i was trying without redis then i installed redis also and same thing happens

[gpetrom]

The problem with pdf printing is not related with the problem with printing in brother printer