Related Parts

InvenTree/part/admin.py

@@ -9,7 +9,7 @@
 import import_export.widgets as widgets
 
 from .models import PartCategory, Part
-from .models import PartAttachment, PartStar
+from .models import PartAttachment, PartStar, PartRelated
 from .models import BomItem
 from .models import PartParameterTemplate, PartParameter
 from .models import PartTestTemplate
@@ -121,6 +121,11 @@ class PartCategoryAdmin(ImportExportModelAdmin):
     search_fields = ('name', 'description')
 
 
+class PartRelatedAdmin(admin.ModelAdmin):
+    ''' Class to manage PartRelated objects '''
+    pass
+
+
 class PartAttachmentAdmin(admin.ModelAdmin):
 
     list_display = ('part', 'attachment', 'comment')
@@ -279,6 +284,7 @@ class Meta:
 
 admin.site.register(Part, PartAdmin)
 admin.site.register(PartCategory, PartCategoryAdmin)
+admin.site.register(PartRelated, PartRelatedAdmin)
 admin.site.register(PartAttachment, PartAttachmentAdmin)
 admin.site.register(PartStar, PartStarAdmin)
 admin.site.register(BomItem, BomItemAdmin)

InvenTree/part/forms.py

@@ -13,7 +13,7 @@
 from django import forms
 from django.utils.translation import ugettext as _
 
-from .models import Part, PartCategory, PartAttachment
+from .models import Part, PartCategory, PartAttachment, PartRelated
 from .models import BomItem
 from .models import PartParameterTemplate, PartParameter
 from .models import PartTestTemplate
@@ -104,6 +104,25 @@ class Meta:
         ]
 
 
+class CreatePartRelatedForm(HelperForm):
+    """ Form for creating a PartRelated object """
+
+    class Meta:
+        model = PartRelated
+        fields = [
+            'part_1',
+            'part_2',
+        ]
+        labels = {
+            'part_2': _('Related Part'),
+        }
+
+    def save(self):
+        """ Disable model saving """
+
+        return super(CreatePartRelatedForm, self).save(commit=False)
+
+
 class EditPartAttachmentForm(HelperForm):
     """ Form for editing a PartAttachment object """
 

InvenTree/part/migrations/0052_partrelated.py

@@ -0,0 +1,22 @@
+# Generated by Django 3.0.7 on 2020-10-16 20:42
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0051_bomitem_optional'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PartRelated',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('part_1', models.ForeignKey(on_delete=django.db.models.deletion.DO_NOTHING, related_name='related_parts_1', to='part.Part')),
+                ('part_2', models.ForeignKey(help_text='Select Related Part', on_delete=django.db.models.deletion.DO_NOTHING, related_name='related_parts_2', to='part.Part')),
+            ],
+        ),
+    ]

InvenTree/part/models.py

@@ -1254,6 +1254,32 @@ def get_all_variants(self):
 
         return self.get_descendants(include_self=False)
 
+    def get_related_parts(self):
+        """ Return list of tuples for all related parts:
+            - first value is PartRelated object
+            - second value is matching Part object
+        """
+
+        related_parts = []
+
+        related_parts_1 = self.related_parts_1.filter(part_1__id=self.pk)
+
+        related_parts_2 = self.related_parts_2.filter(part_2__id=self.pk)
+
+        for related_part in related_parts_1:
+            # Add to related parts list
+            related_parts.append((related_part, related_part.part_2))
+
+        for related_part in related_parts_2:
+            # Add to related parts list
+            related_parts.append((related_part, related_part.part_1))
+
+        return related_parts
+
+    @property
+    def related_count(self):
+        return len(self.get_related_parts())
+
 
 def attach_file(instance, filename):
     """ Function for storing a file for a PartAttachment
@@ -1723,3 +1749,71 @@ def price_range(self):
         pmax = decimal2string(pmax)
 
         return "{pmin} to {pmax}".format(pmin=pmin, pmax=pmax)
+
+
+class PartRelated(models.Model):
+    """ Store and handle related parts (eg. mating connector, crimps, etc.) """
+
+    part_1 = models.ForeignKey(Part, related_name='related_parts_1',
+                               on_delete=models.DO_NOTHING)
+
+    part_2 = models.ForeignKey(Part, related_name='related_parts_2',
+                               on_delete=models.DO_NOTHING,
+                               help_text=_('Select Related Part'))
+
+    def __str__(self):
+        return f'{self.part_1} <--> {self.part_2}'
+
+    def validate(self, part_1, part_2):
+        ''' Validate that the two parts relationship is unique '''
+
+        validate = True
+
+        parts = Part.objects.all()
+        related_parts = PartRelated.objects.all()
+
+        # Check if part exist and there are not the same part
+        if (part_1 in parts and part_2 in parts) and (part_1.pk != part_2.pk):
+            # Check if relation exists already
+            for relation in related_parts:
+                if (part_1 == relation.part_1 and part_2 == relation.part_2) \
+                   or (part_1 == relation.part_2 and part_2 == relation.part_1):
+                    validate = False
+                    break
+        else:
+            validate = False
+
+        return validate
+
+    def clean(self):
+        ''' Overwrite clean method to check that relation is unique '''
+
+        validate = self.validate(self.part_1, self.part_2)
+
+        if not validate:
+            error_message = _('Error creating relationship: check that '
+                              'the part is not related to itself '
+                              'and that the relationship is unique')
+
+            raise ValidationError(error_message)
+
+    def create_relationship(self, part_1, part_2):
+        ''' Create relationship between two parts '''
+
+        validate = self.validate(part_1, part_2)
+
+        if validate:
+            # Add relationship
+            self.part_1 = part_1
+            self.part_2 = part_2
+            self.save()
+
+        return validate
+
+    @classmethod
+    def create(cls, part_1, part_2):
+        ''' Create PartRelated object and relationship between two parts '''
+
+        related_part = cls()
+        related_part.create_relationship(part_1, part_2)
+        return related_part

InvenTree/part/templates/part/related.html

@@ -0,0 +1,77 @@
+{% extends "part/part_base.html" %}
+{% load static %}
+{% load i18n %}
+
+{% block details %}
+
+{% include 'part/tabs.html' with tab='related-parts' %}
+
+<h4>{% trans "Related Parts" %}</h4>
+<hr>
+
+<div id='button-bar'>
+    <div class='button-toolbar container-fluid' style='float: left;'>
+        {% if roles.part.change %}
+        <button class='btn btn-primary' type='button' id='add-related-part' title='{% trans "Add Related" %}'>{% trans "Add Related" %}</button>
+        <div class='filter-list' id='filter-list-related'>
+            <!-- An empty div in which the filter list will be constructed -->
+        </div>
+        {% endif %}
+    </div>
+</div>
+
+<table id='table-related-part' class='table table-condensed table-striped' data-toolbar='#button-toolbar'>
+    <thead>
+        <tr>
+            <th data-field='part' data-serachable='true'>{% trans "Part" %}</th>
+        </tr>
+    </thead>
+    <tbody>
+        {% for item in part.get_related_parts %}
+        {% with part_related=item.0 part=item.1 %}
+            <tr>
+                <td>
+                    <a class='hover-icon'>
+                        <img class='hover-img-thumb' src='{{ part.get_thumbnail_url }}'>
+                        <img class='hover-img-large' src='{{ part.get_thumbnail_url }}'>
+                    </a>
+                    <a href='/part/{{ part.id }}/'>{{ part }}</a>
+                    <div class='btn-group' style='float: right;'>
+                        {% if roles.part.change %}
+                        <button title='{% trans "Delete" %}' class='btn btn-default btn-glyph delete-related-part' url="{% url 'part-related-delete' part_related.id %}" type='button'><span class='fas fa-trash-alt icon-red'/></button>
+                        {% endif %}
+                    </div>
+                </td>
+            </tr>
+        {% endwith %}
+        {% endfor %}
+    </tbody>
+</table>
+
+
+{% endblock %}
+
+{% block js_ready %}
+{{ block.super }}
+
+    $('#table-related-part').inventreeTable({
+    });
+
+    $("#add-related-part").click(function() {
+        launchModalForm("{% url 'part-related-create' %}", {
+            data: {
+                part: {{ part.id }},
+            },
+            reload: true,
+        });
+    });
+
+    $('.delete-related-part').click(function() {
+        var button = $(this);
+
+        launchModalForm(button.attr('url'), {
+            reload: true,
+        });
+    });
+
+{% endblock %}

InvenTree/part/templates/part/tabs.html

@@ -63,6 +63,9 @@
         </a>
     </li>
     {% endif %}
+    <li{% ifequal tab 'related-parts' %} class="active"{% endifequal %}>
+        <a href="{% url 'part-related' part.id %}">{% trans "Related" %} {% if part.related_count > 0 %}<span class="badge">{{ part.related_count }}</span>{% endif %}</a>
+    </li>
     <li{% ifequal tab 'attachments' %} class="active"{% endifequal %}>
         <a href="{% url 'part-attachments' part.id %}">{% trans "Attachments" %} {% if part.attachment_count > 0 %}<span class="badge">{{ part.attachment_count }}</span>{% endif %}</a>
     </li>

InvenTree/part/test_views.py

@@ -201,6 +201,29 @@ def test_make_variant(self):
         self.assertEqual(response.status_code, 200)
 
 
+class PartRelatedTests(PartViewTestCase):
+
+    def test_valid_create(self):
+        """ test creation of an attachment for a valid part """
+
+        response = self.client.get(reverse('part-related-create'), {'part': 1}, HTTP_X_REQUESTED_WITH='XMLHttpRequest')
+        self.assertEqual(response.status_code, 200)
+
+        # TODO - Create a new attachment using this view
+
+    def test_invalid_create(self):
+        """ test creation of an attachment for an invalid part """
+
+        # TODO
+        pass
+
+    def test_edit(self):
+        """ test editing an attachment """
+
+        # TODO
+        pass
+
+
 class PartAttachmentTests(PartViewTestCase):
 
     def test_valid_create(self):

InvenTree/part/urls.py

@@ -12,6 +12,11 @@
 
 from . import views
 
+part_related_urls = [
+    url(r'^new/?', views.PartRelatedCreate.as_view(), name='part-related-create'),
+    url(r'^(?P<pk>\d+)/delete/?', views.PartRelatedDelete.as_view(), name='part-related-delete'),
+]
+
 part_attachment_urls = [
     url(r'^new/?', views.PartAttachmentCreate.as_view(), name='part-attachment-create'),
     url(r'^(?P<pk>\d+)/edit/?', views.PartAttachmentEdit.as_view(), name='part-attachment-edit'),
@@ -60,6 +65,7 @@
     url(r'^sale-prices/', views.PartDetail.as_view(template_name='part/sale_prices.html'), name='part-sale-prices'),
     url(r'^tests/', views.PartDetail.as_view(template_name='part/part_tests.html'), name='part-test-templates'),
     url(r'^track/?', views.PartDetail.as_view(template_name='part/track.html'), name='part-track'),
+    url(r'^related-parts/?', views.PartDetail.as_view(template_name='part/related.html'), name='part-related'),
     url(r'^attachments/?', views.PartDetail.as_view(template_name='part/attachments.html'), name='part-attachments'),
     url(r'^notes/?', views.PartNotes.as_view(), name='part-notes'),
 
@@ -112,6 +118,9 @@
     # Part category
     url(r'^category/(?P<pk>\d+)/', include(part_category_urls)),
 
+    # Part related
+    url(r'^related-parts/', include(part_related_urls)),
+
     # Part attachments
     url(r'^attachment/', include(part_attachment_urls)),