make component types hierarchial

shimatta_kenkyusho/parts/migrations/0012_componenttype_parent_class.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2.5 on 2022-11-11 20:18
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('parts', '0011_auto_20220110_1812'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='componenttype',
+            name='parent_class',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='child_classes', to='parts.componenttype'),
+        ),
+    ]

shimatta_kenkyusho/parts/models.py

@@ -47,6 +47,7 @@ class ComponentType(models.Model):
 	class Meta:
 		ordering = ['class_name']
 	class_name = models.CharField(max_length=50, unique=True)
+	parent_class = models.ForeignKey('self', on_delete=models.PROTECT, related_name='child_classes', null=True, blank=True)
 	passive = models.BooleanField()
 	possible_parameter = models.ManyToManyField(ComponentParameterType, blank=True)
 	key_parameter1 = models.ForeignKey(ComponentParameterType, on_delete=models.CASCADE, blank=True, null=True, related_name="type_param1")
@@ -54,7 +55,27 @@ class ComponentType(models.Model):
 	key_parameter3 = models.ForeignKey(ComponentParameterType, on_delete=models.CASCADE, blank=True, null=True, related_name="type_param3")
 	
 	def __str__(self):
-		return '[' + self.class_name + ']'
+		return self.get_full_path()
+
+	
+	def get_path_components(self):
+		chain = []
+		iterator = self
+		chain.append(self)
+		while iterator.parent_class is not None:
+			chain.append(iterator.parent_class)
+			iterator = iterator.parent_class
+
+		return chain
+
+	def get_full_path(self):
+		output = ''
+		
+		chain = self.get_path_components()
+
+		for i in range(len(chain) - 1, -1, -1):
+			output = output + ' / ' + chain[i].class_name
+		return output
 
 class Storage(models.Model):
 	class Meta:

shimatta_kenkyusho/parts/views.py

@@ -186,8 +186,15 @@ class ComponentTypeDetailView(LoginRequiredMixin, BaseTemplateMixin, DetailView)
     pk_url_kwarg = 'uuid'
     template_name = 'parts/component-types-detail.html'
 
+    def get_breadcrumbs(self):
+        crumbs = self.object.get_path_components()
+        # Reverse list and drop the last element of the reversed list
+        crumbs = crumbs[::-1][:-1]
+        return crumbs
+
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
+        context['breadcrumbs'] = self.get_breadcrumbs()
         return context