added ability to link recipes to ingredients

cookbook/migrations/0027_ingredient_recipe.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.0.4 on 2020-03-17 17:31
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cookbook', '0026_auto_20200219_1605'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='ingredient',
+            name='recipe',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='cookbook.Recipe'),
+        ),
+    ]