registration implemented

Main/models/task.py

@@ -0,0 +1,26 @@
+from django.db import models
+from django.contrib.auth.models import User
+
+from Main.models.extrafile import ExtraFile
+
+
+class Task(models.Model):
+    name = models.TextField()
+    public = models.BooleanField(default=False)
+    legend = models.TextField(default="")
+    input_format = models.TextField(default="")
+    output_format = models.TextField(default="")
+    specifications = models.TextField(default="")
+    time_limit = models.IntegerField(default=10000)
+    creator = models.ForeignKey(User, on_delete=models.SET_NULL, null=True)
+
+    def __str__(self):
+        return self.name
+
+    @property
+    def files(self):
+        return ExtraFile.objects.filter(task=self, is_test=False)
+
+    @property
+    def tests(self):
+        return ExtraFile.objects.filter(task=self, is_test=True)