View dependencies¶

View dependencies let you compute request-time context and feed it into view/data-layer execution.

Typical use cases¶

• permission checks
• tenant scoping
• per-request data-layer kwargs

Pattern¶

Define operation-specific configuration that gathers dependency inputs and merges them into runtime kwargs.

Use this mechanism for request-scoped behavior instead of hard-coding globals in the data layer.

Example¶

Snippet files:

• docs/python_snippets/view_dependencies/main_example.py
• docs/python_snippets/view_dependencies/several_dependencies.py

from pydantic import BaseModel

from django_ninja_jsonapi.views import Operation, OperationConfig
from django_ninja_jsonapi import ViewBaseGeneric


class RequestContext(BaseModel):
    tenant_id: str = "tenant-1"


def common_handler(view, dto: RequestContext) -> dict:
    return {
        "tenant_id": dto.tenant_id,
    }


class CustomerView(ViewBaseGeneric):
    operation_dependencies = {
        Operation.ALL: OperationConfig(
            dependencies=RequestContext,
            prepare_data_layer_kwargs=common_handler,
        ),
    }

In this setup, your data layer receives tenant_id for each operation.