Improved part logic

- Added field 'buildable' - can this part be made from other parts?
- Added @propery 'supplier_count'
- Improved part detail page with new features

InvenTree/part/admin.py

@@ -8,7 +8,7 @@ from .models import PartAttachment
 
 class PartAdmin(ImportExportModelAdmin):
 
-    list_display = ('name', 'IPN', 'description', 'stock', 'category')
+    list_display = ('name', 'IPN', 'description', 'total_stock', 'category')
 
 
 class PartCategoryAdmin(admin.ModelAdmin):

InvenTree/part/forms.py

@@ -25,6 +25,7 @@ class EditPartForm(forms.ModelForm):
             'IPN',
             'URL',
             'minimum_stock',
+            'buildable',
             'trackable',
             'purchaseable',
         ]
@@ -58,7 +59,7 @@ class EditBomItemForm(forms.ModelForm):
 
         self.helper.form_id = 'id-edit-part-form'
         self.helper.form_method = 'post'
-        
+
         self.helper.add_input(Submit('submit', 'Submit'))
 
     class Meta:

InvenTree/part/migrations/0018_part_buildable.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11 on 2018-04-16 12:08
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0017_part_purchaseable'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='part',
+            name='buildable',
+            field=models.BooleanField(default=False),
+        ),
+    ]

InvenTree/part/models.py

@@ -110,6 +110,9 @@ class Part(models.Model):
     # Units of quantity for this part. Default is "pcs"
     units = models.CharField(max_length=20, default="pcs", blank=True)
 
+    # Can this part be built?
+    buildable = models.BooleanField(default=False)
+
     # Is this part "trackable"?
     # Trackable parts can have unique instances
     # which are assigned serial numbers (or batch numbers)
@@ -139,7 +142,8 @@ class Part(models.Model):
         """
 
         # TODO - For now, just return total stock count
-        return self.stock
+        # TODO - In future must take account of allocated stock
+        return self.total_stock
 
     @property
     def can_build(self):
@@ -152,6 +156,7 @@ class Part(models.Model):
 
         total = None
 
+        # Calculate the minimum number of parts that can be built using each sub-part
         for item in self.bom_items.all():
             stock = item.sub_part.available_stock
             n = int(1.0 * stock / item.quantity)
@@ -162,7 +167,7 @@ class Part(models.Model):
         return total
 
     @property
-    def stock(self):
+    def total_stock(self):
         """ Return the total stock quantity for this part.
         Part may be stored in multiple locations
         """
@@ -176,16 +181,21 @@ class Part(models.Model):
 
     @property
     def has_bom(self):
-        return self.bom_item_count > 0
+        return self.bom_count > 0
 
     @property
-    def bom_item_count(self):
+    def bom_count(self):
         return self.bom_items.all().count()
 
     @property
     def used_in_count(self):
         return self.used_in.all().count()
 
+    @property
+    def supplier_count(self):
+        # Return the number of supplier parts available for this part
+        return self.supplier_parts.all().count()
+
     """
     @property
     def projects(self):

InvenTree/part/templates/part/detail.html

@@ -25,6 +25,10 @@
     <td>Units</td>
     <td>{{ part.units }}</td>
 </tr>
+<tr>
+    <td>Buildable</td>
+    <td>{{ part.buildable }}</td>
+</tr>
 <tr>
     <td>Trackable</td>
     <td>{{ part.trackable }}</td>

InvenTree/part/templates/part/part_base.html

@@ -41,12 +41,24 @@
         {% endif %}
         <tr>
             <td>Available Stock</td>
-            <td>{{ part.available_stock }}</td>
+            <td>
+                {% if part.available_stock == 0 or part.available_stock < part.minimum_stock %}
+                <span class='label label-danger'>{{ part.available_stock }}</span>
+                {% else %}
+                {{ part.available_stock }}
+                {% endif %}
+            </td>
         </tr>
-        {% if part.has_bom %}
+        {% if part.buildable %}
         <tr>
             <td>Can Build</td>
-            <td>{{ part.can_build }}</td>
+            <td>
+                {% if part.can_build == 0 %}
+                <span class='label label-danger'>0</span>
+                {% else %}
+                {{ part.can_build }}
+                {% endif %}
+            </td>
         </tr>
         {% endif %}
     </table>

InvenTree/part/templates/part/tabs.html

@@ -1,18 +1,16 @@
 <ul class="nav nav-tabs">
     <li{% ifequal tab 'detail' %} class="active"{% endifequal %}><a href="{% url 'part-detail' part.id %}">Details</a></li>
-    <li{% ifequal tab 'bom' %} class="active"{% endifequal %}><a href="{% url 'part-bom' part.id %}">BOM{% if part.has_bom > 0 %}<span class="badge">{{ part.bom_item_cout }}</span>{% endif %}</a></li>
-    {% if part.has_bom %}
-    <li{% ifequal tab 'build' %} class "active"{% endifequal %}><a href="#">Build</a></li>
+    {% if part.buildable %}
+    <li{% ifequal tab 'bom' %} class="active"{% endifequal %}><a href="{% url 'part-bom' part.id %}">BOM<span class="badge">{{ part.bom_count }}</span></a></li>
+    <li{% ifequal tab 'build' %} class "active"{% endifequal %}><a href="#">Build<span class='badge'>{{ part.can_build }}</span></a></li>
     {% endif %}
     {% if part.used_in_count > 0 %}
     <li{% ifequal tab 'used' %} class="active"{% endifequal %}><a href="{% url 'part-used-in' part.id %}">Used In{% if part.used_in_count > 0 %}<span class="badge">{{ part.used_in_count }}</span>{% endif %}</a></li>
     {% endif %}
-    <li{% ifequal tab 'stock' %} class="active"{% endifequal %}><a href="{% url 'part-stock' part.id %}">Stock <span class="badge">{{ part.stock }}</span></a></li>
+    <li{% ifequal tab 'stock' %} class="active"{% endifequal %}><a href="{% url 'part-stock' part.id %}">Stock <span class="badge">{{ part.available_stock }}</span></a></li>
     {% if part.purchaseable %}
     <li{% ifequal tab 'suppliers' %} class="active"{% endifequal %}><a href="{% url 'part-suppliers' part.id %}">Suppliers
-        {% if part.supplier_parts.all|length > 0 %}
-            <span class="badge">{{ part.supplier_parts.all|length }}<span>
-        {% endif %}
+            <span class="badge">{{ part.supplier_count }}<span>
         </a></li>
     {% endif %}
     {% if part.trackable %}