Write Python Django code to create an API that fetches a value from a query parameter and inserts this value into a database.

Question

Assisting AI · Accepted Answer

To implement this in Django, you can use Django REST Framework (DRF) for simplicity. First, create a model to store the value:

```python
# models.py
from django.db import models

class Value(models.Model):
    value = models.CharField(max_length=255)
    created_at = models.DateTimeField(auto_now_add=True)
```

Next, create a serializer:

```python
# serializers.py
from rest_framework import serializers
from .models import Value

class ValueSerializer(serializers.ModelSerializer):
    class Meta:
        model = Value
        fields = ['id', 'value', 'created_at']
```

Now, write a view that reads the query parameter and saves it:

```python
# views.py
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from .models import Value
from .serializers import ValueSerializer

class ValueCreateView(APIView):
    def get(self, request, *args, **kwargs):
        # Expecting ?value=some_text
        val = request.query_params.get('value')
        if not val:
            return Response({'error': 'value query param required'}, status=status.HTTP_400_BAD_REQUEST)
        # Create and serialize
        instance = Value.objects.create(value=val)
        serializer = ValueSerializer(instance)
        return Response(serializer.data, status=status.HTTP_201_CREATED)
```

Add a URL pattern:

```python
# urls.py
from django.urls import path
from .views import ValueCreateView

urlpatterns = [
    path('api/value/', ValueCreateView.as_view(), name='value-create'),
]
```

**Explanation & Complexity**: The view performs a single database insert, so the time complexity is O(1). DRF handles request parsing, validation, and response formatting. This approach scales well for simple CRUD operations and can be extended with authentication, pagination, or more complex business logic as needed.

Write Python Django code to create an API that fetches a value from a query parameter and inserts this value into a database.

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