How to use django-multiselect field in postman?

Question

I am using pip module MultiSelectField Here is my model

SALES_CHANNEL = [
    ('retailer', 'Retailer'),
    ('wholesaler', 'Wholesaler'),
    ('consumer', 'Consumer'),
    ('distributor', 'Distributor'),
    ('online', 'Online')
]

class ProductModel(basemodel.BaseModel):
    name = models.CharField(max_length=200)
    mrp = models.DecimalField(
        max_digits=10, decimal_places=2,
        null=True, blank=True
    )
    selling_price = models.DecimalField(
        max_digits=10, decimal_places=2,
        null=True, blank=True
    )
    upc = models.CharField(max_length=30, null=True, blank=True)
    dimensions = models.CharField(max_length=200, null=True, blank=True)
    weight = models.CharField(max_length=200, null=True, blank=True)
    sku = models.CharField(max_length=200, unique=True)
    product_type = models.CharField(
        max_length=30, choices=PRODUCT_TYPE, default='goods'
    )
    sales_channel = MultiSelectField(
        choices=SALES_CHANNEL, null=True, blank=True
    )

While creating a product with postman, my request body is:

{
    "name": "first unit",
    "sku": "first sales chann",
    "sales_channel":["retailer", "wholesaler"]

}

But on serializer.is_valid(), I get this error:

        "sales_channel": [
            "\"['retailer', 'wholesaler']\" is not a valid choice."
        ],

How can I post data on postman for multiselectfield?

score 1 · Answer 1 · answered Apr 26 '21 at 00:28

Small Update to the currently accepted answer by @skhynixsk I found it better to use MultipleChoiceField() instead of ListField() since we can pass the correct choices inside MultipleChoiceField() for validation. If we use just ListField(), it will accept anything as the correct choice, instead of validating the required correct choices.

sales_channel = serializers.MultipleChoiceField(["retailer", "wholesaler"])

More on MultipleChoiceField() here

skhynixsk · Accepted Answer · 2020-05-29T11:49:12.150

0

You can post sales_channel multiple times in form data like:

sales_channel: retailer sales_cahnnel: wholesaler

N.B: Not in raw data. Ok fine, let me help you. Could you add the below details to your serializer before your meta data ex:

class YourSerializer(serializers.ModelSerializer):
sales_channel = serializers.ListField()
     class Meta:
         model = YourModel

edited May 29 '20 at 11:49

answered May 27 '20 at 18:44

skhynixsk

194
6

But how can I achieve this in raw_data? I am sending all of my data as raw_data only, cant chnage that – Aarti Joshi May 28 '20 at 05:15

score 0 · Answer 3 · answered Jun 14 '20 at 05:09

In order to achieve this you need to change your serializer

from rest_framework import fields    

class CustomMultipleChoiceField(fields.MultipleChoiceField):
    def to_representation(self, value):
        return list(super().to_representation(value))

class YourSerializer(serializers.ModelSerializer):
    sales_channel = CustomMultipleChoiceField(choices=SALES_CHANNEL, required=False)

    class Meta:
        model = ProductModel
        fields = '__all__'

How to use django-multiselect field in postman?

3 Answers3