gitea
4b6138f049
Four related backend features. They are committed together because they interleave in api/views.py and api/serializers.py - one hunk holds the combinations ViewSet, the licensing helpers and LicenseView - and splitting by hunk would produce commits that do not import. ExtraCombination records previously-used combinations of lookup nomenclature values so an operator can refill the Additional Data fields in one click. Deduplicated by a canonical order-independent hash, since JSONField equality compares serialized text on SQLite and so depends on key order. Weighing replaces set_tare/set_gross with a single measure action that assigns by weight - lighter becomes tare, heavier gross - because trucks arrive both loaded and empty. A second, lighter reading moves the first to gross carrying its own timestamp, user and manual fields, so provenance follows the value rather than the slot. Manual entries record who, when and why, gated on the previously unenforced can_measure and can_manually_measure flags. ScaleProtocol stores how to read each indicator, so a new scale type is a configuration change rather than a new binary on every station PC. Licensing is offline and node-locked: the server verifies an Ed25519 signature against a fingerprint of four hardware components, tolerating one change, and counts concurrently connected stations. Sites are air-gapped, so there is no activation server. A 14-day grace period keeps an unlicensed or newly-invalid install working, because a licence check must never stop a weighbridge without warning. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
53 lines
1.7 KiB
Python
53 lines
1.7 KiB
Python
# Generated by Django 6.0.1 on 2026-09-17 16:01
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from django.db import migrations, models
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class Migration(migrations.Migration):
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dependencies = [
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("api", "0005_grant_admin_permissions"),
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]
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operations = [
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migrations.CreateModel(
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name="ScaleProtocol",
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fields=[
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(
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"id",
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models.BigAutoField(
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auto_created=True,
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primary_key=True,
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serialize=False,
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verbose_name="ID",
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),
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),
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("name", models.CharField(max_length=100, unique=True)),
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(
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"kind",
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models.CharField(
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choices=[
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("fixed_column", "Fixed column"),
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("simulator", "Simulator (ST/US)"),
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("toledo_continuous", "Toledo Continuous"),
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("sics", "Mettler-Toledo SICS"),
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],
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default="fixed_column",
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max_length=20,
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),
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),
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(
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"poll_command",
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models.CharField(blank=True, default="", max_length=20),
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),
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("poll_interval", models.FloatField(default=0.2)),
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("config", models.JSONField(blank=True, default=dict)),
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("is_builtin", models.BooleanField(default=False)),
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("is_active", models.BooleanField(default=True)),
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],
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options={
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"ordering": ["name"],
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},
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),
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]
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