Django DRF - Include Foreign-Key field to serializer - django

Question

How do I add 'platform_description' field to be part of battlesSerializer result?
Model
class battles(models.Model):
# Fields
created = models.DateTimeField(auto_now_add=True, editable=False)
last_updated = models.DateTimeField(auto_now=True, editable=False)
wager = models.FloatField(max_length=30)
battle_rules = models.CharField(max_length=30,null = True,blank = True)
accepting_time = models.DateTimeField()
offer_expiration_time = models.DateTimeField(null = True,blank = True)
battle_time = models.DateTimeField(null = True,blank = True)
rake = models.FloatField()
# Relationship Fields
platform_id = models.ForeignKey('platforms.game_platforms', related_name='seal')
class Meta:
ordering = ('-created',)
def __unicode__(self):
return u'%s' % self.id
def get_absolute_url(self):
return reverse('platforms_battles_detail', args=(self.id,))
def get_update_url(self):
return reverse('platforms_battles_update', args=(self.id,))
class game_platforms(models.Model):
# Fields
created = models.DateTimeField(auto_now_add=True, editable=False)
last_updated = models.DateTimeField(auto_now=True, editable=False)
platform_description = models.CharField(max_length=30)
class Meta:
ordering = ('-created',)
def __unicode__(self):
return u'%s' % self.id
def __str__(self):
return '%s' % self.platform_description
def get_absolute_url(self):
return reverse('platforms_game_platforms_detail', args=(self.id,))
def get_update_url(self):
return reverse('platforms_game_platforms_update', args=(self.id,))
Serializer
class battlesSerializer(serializers.ModelSerializer):
class Meta:
model = models.battles
fields = (
'id',
'created',
'last_updated',
'wager',
'battle_rules',
'accepting_time',
'offer_expiration_time',
'battle_time',
'rake',
)
class game_platformsSerializer(serializers.ModelSerializer):
class Meta:
model = models.game_platforms
fields = (
'id',
'created',
'last_updated',
'platform_description',
)

Answer 1

You can use SerializerMethodField:
class battlesSerializer(serializers.ModelSerializer):
platform_description = serializers.SerializerMethodField()
def get_platform_description(self, obj):
# Use a try - except block if needed
return obj.platform_id.platform_description
class Meta:
model = models.battles
fields = (
'id',
'created',
'last_updated',
'wager',
'battle_rules',
'accepting_time',
'offer_expiration_time',
'battle_time',
'rake',
'platform_description', # add this field
)
Also, you could take a look over PEP8's naming conventions to write an elegant python code.