Added instructor availability model and admin

cntmanage/flightslot/models/availabilities.py

@@ -0,0 +1,79 @@
+from django.db import models
+from datetime import date
+
+from ..models.instructors import Instructor
+
+class Availability(models.Model):
+    id = models.BigAutoField(
+        primary_key=True
+    )
+
+    week = models.PositiveSmallIntegerField(
+        null=False,
+        db_index=True,
+        db_default=date.today().isocalendar().week,
+        auto_created=True,
+        verbose_name="Week Number"
+    )
+
+    instructor = models.ForeignKey(
+        Instructor,
+        null=False,
+        db_index=True,
+        on_delete=models.CASCADE,
+        verbose_name="Instructor Selection"
+    )
+
+    monday = models.BooleanField(
+        default=True,
+        null=False
+    )
+
+    tuesday = models.BooleanField(
+        default=True,
+        null=False
+    )
+
+    wednesday = models.BooleanField(
+        default=True,
+        null=False
+    )
+
+    thursday = models.BooleanField(
+        default=True,
+        null=False
+    )
+
+    friday = models.BooleanField(
+        default=True,
+        null=False
+    )
+
+    saturday = models.BooleanField(
+        default=True,
+        null=False
+    )
+
+    sunday = models.BooleanField(
+        default=True,
+        null=False
+    )
+
+    hours = models.DurationField(
+        null=True,
+        verbose_name="Available hours"
+    )
+
+    notes = models.TextField(
+        max_length=140,
+        null=True,
+        blank=True
+    )
+
+    class Meta():
+        verbose_name = "Instructor Availability"
+        verbose_name_plural = "Instructor Availabilities"
+
+    def __str__(self):
+        return f"Week {self.week} - {self.instructor.surname} {self.instructor.name[0]}."
+