from django.db import models


class Dependency(models.Model):

    source = models.CharField(max_length=255, db_index=True)
    depends_on = models.CharField(max_length=255, db_index=True)

    class Meta:
        unique_together = ("source", "depends_on")

from __future__ import unicode_literals
from django.db import models


class Dependency(models.Model):

    source = models.CharField(max_length=255, db_index=True)
    depends_on = models.CharField(max_length=255, db_index=True)

    class Meta:
        unique_together = ("source", "depends_on")

    def __unicode__(self):
        return "{0} depends on {1}".format(self.source, self.depends_on)

Add __unicode__ to Dependency model
Add __unicode__ to Dependency model

+ from __future__ import unicode_literals
  from django.db import models
  
  
  class Dependency(models.Model):
  
      source = models.CharField(max_length=255, db_index=True)
      depends_on = models.CharField(max_length=255, db_index=True)
  
      class Meta:
          unique_together = ("source", "depends_on")
  
+     def __unicode__(self):
+         return "{0} depends on {1}".format(self.source, self.depends_on)
+ 
Add __unicode__ to Dependency model
## Code Before:
from django.db import models


class Dependency(models.Model):

    source = models.CharField(max_length=255, db_index=True)
    depends_on = models.CharField(max_length=255, db_index=True)

    class Meta:
        unique_together = ("source", "depends_on")

## Instruction:
Add __unicode__ to Dependency model
## Code After:
from __future__ import unicode_literals
from django.db import models


class Dependency(models.Model):

    source = models.CharField(max_length=255, db_index=True)
    depends_on = models.CharField(max_length=255, db_index=True)

    class Meta:
        unique_together = ("source", "depends_on")

    def __unicode__(self):
        return "{0} depends on {1}".format(self.source, self.depends_on)
