Modify some more

artists/migrations/0004_auto_20201216_0724.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.1.4 on 2020-12-16 07:24
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('artists', '0003_auto_20201215_2107'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='artist',
+            name='name',
+            field=models.CharField(blank=True, max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='artist',
+            name='romanized_name',
+            field=models.CharField(blank=True, max_length=255),
+        ),
+    ]

artists/models.py

@@ -2,14 +2,31 @@ from django.db import models
 from django.apps import apps
 
 # Create your models here.
+class ArtistManager(models.Manager):
+    def create_or_new(self, romanized_name):
+        romanized_name = romanized_name.strip()
+        qs = self.get_queryset().filter(romanized_name__iexact=romanized_name)
+        if qs.exists():
+            return qs.first(), False
+        return Artist.objects.create(romanized_name=romanized_name), True
+    
+    def comma_to_qs(self, artists_str):
+        final_ids = []
+        for artist in artists_str.split(','):
+            obj, created = self.create_or_new(artist)
+            final_ids.append(obj.id)
+        qs = self.get_queryset().filter(id__in=final_ids).distinct()
+        return qs
 
 class Artist(models.Model):
-    name = models.CharField(max_length=255)
+    name = models.CharField(max_length=255,blank=True)
-    romanized_name = models.CharField(max_length=255)
+    romanized_name = models.CharField(max_length=255,blank=True)
     aliases = models.ManyToManyField("self",blank=True)
     category = models.ManyToManyField("categories.Category",blank=True)
     about_composer = models.TextField(blank=True)
     about_music = models.TextField(blank=True)
+
+    objects = ArtistManager()
     
     def __str__(self):
         return self.romanized_name

categories/migrations/0004_auto_20201216_0724.py

@@ -0,0 +1,17 @@
+# Generated by Django 3.1.4 on 2020-12-16 07:24
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('categories', '0003_auto_20201215_2107'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='category',
+            options={'verbose_name_plural': 'Categories'},
+        ),
+    ]

categories/models.py

@@ -1,11 +1,28 @@
 from django.db import models
 
 # Create your models here.
+class CategoryManager(models.Manager):
+    def create_or_new(self, name):
+        name = name.strip()
+        qs = self.get_queryset().filter(name__iexact=name)
+        if qs.exists():
+            return qs.first(), False
+        return Category.objects.create(name=name), True
+    
+    def comma_to_qs(self, categorys_str):
+        final_ids = []
+        for category in categories_str.split(','):
+            obj, created = self.create_or_new(category)
+            final_ids.append(obj.id)
+        qs = self.get_queryset().filter(id__in=final_ids).distinct()
+        return qs
 
 class Category(models.Model):
     name = models.CharField(max_length=255)
     description = models.TextField(blank=True)
 
+    objects = CategoryManager()
+
     class Meta:
         verbose_name_plural = "Categories"
 

songs/admin.py

@@ -1,5 +1,6 @@
 from django.contrib import admin
 
 from . import models
-# Register your models here.
+
 admin.site.register(models.Song)
+admin.site.register(models.OutsideSong)