django many-de-serialization add

# Add Student 
class Addstu1 (APIView): 
    DEF POST (Self, Request): 
        Data = request.data 
        Data [ 'IMG'] = '123456' # IMG data written directly to the dead 
        Print (Data) 
        SS = Stuerializers1 (Data = Data) 
        IF ss.is_valid (): 
            ss.save () 
            return the Response ({ 'code': 200 is, 'Message': 'added successfully'}) 
        return the Response ({ 'code': 10020, 'Message': 'Add failed '}) 


the most important portion of the sequence

# Add-many student 
class Stuerializers1 (serializers.Serializer): 
    name = serializers.CharField (MAX_LENGTH = 32) 
    IMG = serializers.CharField (MAX_LENGTH = 255) 
    CID = serializers.ListField () # can be added to the ListField plurality 
    def create ( Self, the Data): 
        cid = data.pop ( 'cid') #cid not my stu in the field so pop cid

        ss = Stu.objects.create (** data) # Add stu table 
        ss.duo.set (cid) # stu add foreign key Dou 
        return SS 

Model

# Course 
class Kc (Base, models.Model): 
    name = models.CharField (MAX_LENGTH = 32) 
    . Price = models.DecimalField (= max_digits. 9, decimal_places = 2) 
    # = sss_set 

    class Meta -: 
        named db_table, = 'KC' 

# Student table 
Stu class (Base, models.Model): 
    name = models.CharField (max_length = 32) 
    img = models.CharField (max_length = 255) 
    # the related_name = 'sss' name when the add-back from the individual when he is equivalent courses the foreign key table sss_set 
    # can directly replace stu list of dou 
    Duo = models.ManyToManyField (to = 'Kc', the related_name = 'sss') # 
    class Meta: 
        db_table = 'stu' 

there is an error, please indicate