Simplify part model

- Remove 'varian't or ''revision' field
- Part name must be unique across database

InvenTree/part/forms.py

@@ -92,7 +92,6 @@ class EditPartForm(HelperForm):
             'category',
             'name',
             'IPN',
-            'variant',
             'is_template',
             'variant_of',
             'description',

InvenTree/part/migrations/0005_auto_20190526_1119.py

@@ -0,0 +1,26 @@
+# Generated by Django 2.2 on 2019-05-26 01:19
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0004_auto_20190525_2356'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='part',
+            name='revision',
+            field=models.CharField(blank=True, help_text='Part rerevision code', max_length=32),
+        ),
+        migrations.AlterUniqueTogether(
+            name='part',
+            unique_together={('name', 'revision')},
+        ),
+        migrations.RemoveField(
+            model_name='part',
+            name='variant',
+        ),
+    ]

InvenTree/part/migrations/0006_auto_20190526_1215.py

@@ -0,0 +1,27 @@
+# Generated by Django 2.2 on 2019-05-26 02:15
+
+import InvenTree.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0005_auto_20190526_1119'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='part',
+            name='name',
+            field=models.CharField(help_text='Part name (must be unique)', max_length=100, unique=True, validators=[InvenTree.validators.validate_part_name]),
+        ),
+        migrations.AlterUniqueTogether(
+            name='part',
+            unique_together=set(),
+        ),
+        migrations.RemoveField(
+            model_name='part',
+            name='revision',
+        ),
+    ]

InvenTree/part/models.py

@@ -162,6 +162,7 @@ def match_part_names(match, threshold=80, reverse=True, compare_length=False):
 
         if compare_length:
             # Also employ primitive length comparison
+            # TODO - Improve this somewhat...
             l_min = min(len(match), len(compare))
             l_max = max(len(match), len(compare))
 
@@ -211,9 +212,6 @@ class Part(models.Model):
     class Meta:
         verbose_name = "Part"
         verbose_name_plural = "Parts"
-        unique_together = [
-            ('name', 'variant')
-        ]
 
     def __str__(self):
         return "{n} - {d}".format(n=self.full_name, d=self.description)
@@ -236,9 +234,6 @@ class Part(models.Model):
         
         elements.append(self.name)
 
-        if self.variant:
-            elements.append(self.variant)
-
         return ' | '.join(elements)
 
     def get_absolute_url(self):
@@ -262,12 +257,11 @@ class Part(models.Model):
                 'variant_of': _("Part cannot be a variant of another part if it is already a template"),
             })
 
-    name = models.CharField(max_length=100, blank=False, help_text='Part name',
+    name = models.CharField(max_length=100, blank=False, unique=True,
+                            help_text='Part name (must be unique)',
                             validators=[validators.validate_part_name]
                             )
 
-    variant = models.CharField(max_length=32, blank=True, help_text='Part variant or revision code')
-
     is_template = models.BooleanField(default=False, help_text='Is this part a template part?')
 
     variant_of = models.ForeignKey('part.Part', related_name='variants',

InvenTree/part/serializers.py

@@ -87,7 +87,6 @@ class PartSerializer(serializers.ModelSerializer):
             'IPN',
             'is_template',
             'variant_of',
-            'variant',
             'description',
             'keywords',
             'URL',

InvenTree/part/templates/part/detail.html

@@ -42,12 +42,6 @@
             <td>{{ part.IPN }}</td>
         </tr>
         {% endif %}
-        {% if part.variant %}
-        <tr>
-            <td><b>Variant</b></td>
-            <td>{{ part.variant }}</td>
-        </tr>
-        {% endif %}
         <tr>
             <td><b>Description</b></td>
             <td>{{ part.description }}</td>

InvenTree/part/templates/part/part_base.html

@@ -38,9 +38,6 @@
         <h4>
             {{ part.full_name }}
         </h4>   
-        {% if part.variant %}
-        <p>Variant: {{ part.variant }}</p>
-        {% endif %}
         <p><i>{{ part.description }}</i></p>
         <p>
             <div class='btn-group'>