added material models and admin interface

jdav_web/jdav_web/settings.py

@@ -32,6 +32,7 @@ ALLOWED_HOSTS = []
 
 INSTALLED_APPS = [
     'startpage.apps.StartpageConfig',
+    'material.apps.MaterialConfig',
     'django.contrib.admin',
     'django.contrib.auth',
     'django.contrib.contenttypes',

jdav_web/material/admin.py

@@ -0,0 +1,12 @@
+from django.contrib import admin
+
+from .models import MaterialPart
+
+# Register your models here.
+
+
+class MaterialAdmin(admin.ModelAdmin):
+    fields = ['name', 'buy_date']
+    list_display = ('name', 'buy_date', 'should_be_replaced')
+
+admin.site.register(MaterialPart, MaterialAdmin)

jdav_web/material/apps.py

@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class MaterialConfig(AppConfig):
+    name = 'material'

jdav_web/material/migrations/0001_initial.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.2 on 2016-10-17 15:18
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='MaterialPart',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=30)),
+                ('buy_date', models.DateTimeField(verbose_name='purchase date')),
+            ],
+        ),
+    ]

jdav_web/material/migrations/0002_auto_20161017_1522.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.2 on 2016-10-17 15:22
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('material', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='materialpart',
+            name='buy_date',
+            field=models.DateField(verbose_name='purchase date'),
+        ),
+    ]

jdav_web/material/models.py

@@ -0,0 +1,37 @@
+from datetime import date, datetime
+
+from django.db import models
+from django.utils import timezone
+
+# maximum time in years of a material part until being replaced
+MAX_TIME_MATERIAL = 5
+
+
+# Create your models here.
+class MaterialPart(models.Model):
+    name = models.CharField(max_length=30)
+    buy_date = models.DateField('purchase date')
+    # owner = models.ForeignKey(Leiter)  to be added later when there are user
+
+    def __repr__(self):
+        return self.name
+
+    def should_be_replaced(self):
+        buy_time = timezone.make_aware(datetime.combine(self.buy_date,
+                                                        datetime.min.time()))
+        return yearsago(MAX_TIME_MATERIAL) >= buy_time
+
+    should_be_replaced.admin_order_field = 'buy_date'
+    should_be_replaced.boolean = True
+    should_be_replaced.short_description = 'Should be replaced?'
+
+
+def yearsago(years, from_date=None):
+    if from_date is None:
+        from_date = timezone.now()
+    try:
+        return from_date.replace(year=from_date.year - years)
+    except ValueError:
+        # 29.02 -> use 28.02
+        assert from_date.month == 2 and from_date.day == 29
+        return from_date.replace(month=2, day=28, year=from_date.year - years)

jdav_web/material/tests.py

@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.

jdav_web/material/views.py

@@ -0,0 +1,3 @@
+from django.shortcuts import render
+
+# Create your views here.