Add ManufacturerPartParameter model

InvenTree/company/migrations/0038_manufacturerpartparameter.py

@@ -0,0 +1,27 @@
+# Generated by Django 3.2.4 on 2021-06-20 07:48
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('company', '0037_supplierpart_update_3'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ManufacturerPartParameter',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(help_text='Parameter name', max_length=500, verbose_name='Name')),
+                ('value', models.CharField(help_text='Parameter value', max_length=500, verbose_name='Value')),
+                ('units', models.CharField(blank=True, help_text='Parameter units', max_length=64, null=True, verbose_name='Units')),
+                ('manufacturer_part', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='parameters', to='company.manufacturerpart', verbose_name='Manufacturer Part')),
+            ],
+            options={
+                'unique_together': {('manufacturer_part', 'name')},
+            },
+        ),
+    ]

InvenTree/company/models.py

@@ -371,6 +371,47 @@ class ManufacturerPart(models.Model):
         return s
 
 
+class ManufacturerPartParameter(models.Model):
+    """
+    A ManufacturerPartParameter represents a key:value parameter for a MnaufacturerPart.
+
+    This is used to represent parmeters / properties for a particular manufacturer part.
+
+    Each parameter is a simple string (text) value.
+    """
+
+    class Meta:
+        unique_together = ('manufacturer_part', 'name')
+
+    manufacturer_part = models.ForeignKey(
+        ManufacturerPart,
+        on_delete=models.CASCADE,
+        related_name='parameters',
+        verbose_name=_('Manufacturer Part'),
+    )
+
+    name = models.CharField(
+        max_length=500,
+        blank=False,
+        verbose_name=_('Name'),
+        help_text=_('Parameter name')
+    )
+
+    value = models.CharField(
+        max_length=500,
+        blank=False,
+        verbose_name=_('Value'),
+        help_text=_('Parameter value')
+    )
+
+    units = models.CharField(
+        max_length=64,
+        blank=True, null=True,
+        verbose_name=_('Units'),
+        help_text=_('Parameter units')
+    )
+
+
 class SupplierPart(models.Model):
     """ Represents a unique part as provided by a Supplier
     Each SupplierPart is identified by a SKU (Supplier Part Number)