Add Positional Arguments to Get Next/Previous

Added filter_args array argument to be passed to get_next/previous methods.
Added extra boolean fields to project model for testing.

sample_project/samples/migrations/0003_project_isapproved.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.1 on 2018-10-06 12:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('samples', '0002_auto_20180319_2117'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='project',
+            name='isApproved',
+            field=models.BooleanField(default=False),
+        ),
+    ]

sample_project/samples/migrations/0004_project_isfunded.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.1 on 2018-10-06 13:01
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('samples', '0003_project_isapproved'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='project',
+            name='isFunded',
+            field=models.BooleanField(default=False),
+        ),
+    ]

sample_project/samples/models.py

@@ -49,9 +49,15 @@ class Project(SimpleModel, SortableMixin):
 
     category = SortableForeignKey(Category, on_delete=models.CASCADE)
     description = models.TextField()
+    isApproved = models.BooleanField(default=False)
+    isFunded = models.BooleanField(default=False)
 
     order = models.PositiveIntegerField(default=0, editable=False)
 
+    def get_next(self):
+        return super(Project, self).get_next(
+            filter_args=[models.Q(isApproved=True) | models.Q(isFunded=True)])
+
 
 # Registered as a tabular inline on `Project`
 @python_2_unicode_compatible