Omnitron Shipment Client

OmnitronShipmentClient can produce a shipping label (cargo label) in two ways:

1. Local generation (default): The label is generated inside OMS via get_label_data.
2. Fetch from Omnitron: The label is retrieved from the shipping-info record on Omnitron (cargo_label).

Which path is used is controlled by two independent flags under shipper_info.strategies.

Strategies

Strategy	Default	Description
fetch_label	false	If true, the label is fetched from Omnitron; if false, it is generated locally.
fetch_label_only_for_4p	false	Only meaningful when fetch_label = true. If true, the label is fetched from Omnitron only for orders where extra_field.is4P evaluates to true; for all other orders the label is generated locally. If false (default), the is4P check is skipped and the label for all orders is fetched from Omnitron.

Behavior Table

fetch_label	fetch_label_only_for_4p	extra_field.is4P	Result
false	—	—	Label is generated locally
true	false (default)	any	Label is fetched from Omnitron
true	true	true / "true"	Label is fetched from Omnitron
true	true	false / missing / "false"	Label is generated locally

The is4P value is supported both as a boolean (true) and as a string ("true"). For string values, case and leading/trailing whitespace are ignored (e.g. " True " is accepted as true). Any other value (false, 0, null, or the field being absent entirely) is treated as "not 4P".

How to Configure shipper_info in a Cargo Condition

In the example condition from the original question, shipper_info was empty:

"conf": {
    "klass": "oms.shipments.clients.omnitron_shipment_client.OmnitronShipmentClient",
    "shipper_info": {}
}

If you want labels for 4P orders to be fetched from Omnitron, shipper_info should be filled in as follows:

"conf": {
    "klass": "oms.shipments.clients.omnitron_shipment_client.OmnitronShipmentClient",
    "shipper_info": {
        "strategies": {
            "fetch_label": true,
            "fetch_label_only_for_4p": true
        }
    }
}

Full example of a cargo company condition:

{
    "rules_configuration": {
        "rules": [
            {
                "klass": "oms.shipments.shipment_conditions.ChannelBasedOrdersCondition",
                "params": {
                    "conf": {
                        "klass": "oms.shipments.clients.omnitron_shipment_client.OmnitronShipmentClient",
                        "shipper_info": {
                            "strategies": {
                                "fetch_label": true,
                                "fetch_label_only_for_4p": true
                            }
                        }
                    },
                    "channels": [67],
                    "condition_type": "sales_channel"
                }
            }
        ]
    },
    "cargo_company": 34
}

If you want labels to be fetched from Omnitron for all orders (without distinguishing 4P), either omit fetch_label_only_for_4p entirely or leave it as false; just "fetch_label": true is enough.

Marking an Order as 4P

For the label to be fetchable from Omnitron (when fetch_label_only_for_4p = true), the order's extra_field must contain the is4P information:

{
    "extra_field": {
        "is4P": true
    }
}

API Service Used

When the fetch_label condition (and is4P, if required) is satisfied, the label is fetched from Omnitron via OmnitronApiClient.get_shipping_info.

• Endpoint: GET /order_shipping_infos/?order={omnitron_id}&sort=-created_date
• Full URL: {OMNITRON_BASE_URL}/order_shipping_infos/?order={omnitron_id}&sort=-created_date
• Auth: Omnitron client token header (added automatically by the client)
• The client takes the first record from the returned results list (the most recent one, due to sort=-created_date) and uses its cargo_label value as the label URL.

Example Request

GET /order_shipping_infos/?order=12345&sort=-created_date HTTP/1.1
Host: <omnitron-host>
Authorization: Token <omnitron_token>
Content-Type: application/json

Example Response

{
    "count": 1,
    "next": null,
    "previous": null,
    "results": [
        {
            "pk": 1,
            "order": 12345,
            "order_number": "6288872",
            "shipping_company": "other",
            "send_request": null,
            "send_response": {},
            "is_send": true,
            "cargo_label": "https://omnitron.example.com/cargo-label/123/",
            "modified_date": "2022-11-03T06:45:05.634999Z",
            "created_date": "2022-11-03T06:45:05.634976Z",
            "shipping_option_group": null
        }
    ]
}

Return Value of OMS's get_shipping_label

get_shipping_label returns a (label_data, label_url) tuple:

Scenario	label_data	label_url
Fetched from Omnitron (response present)	None	cargo_label URL (e.g. https://omnitron.example.com/cargo-label/123/)
Fetched from Omnitron but shipping_info is empty/None	None	None
Generated locally	ContentFile (HTML)	OMS label URL

On the Omnitron-fetch path, label_data is always None; the label arrives as an external URL (label_url). On the local-generation path, the label content is returned as a ContentFile inside label_data.

Summary Flow

get_shipping_label(package)
        │
        ▼
fetch_label == true ?
        │ no  → generate locally (get_label_data)
        │ yes
        ▼
fetch_label_only_for_4p == true ?
        │ no  → fetch from Omnitron (get_shipping_info → cargo_label)
        │ yes
        ▼
order.extra_field.is4P true ?
        │ yes → fetch from Omnitron (get_shipping_info → cargo_label)
        │ no  → generate locally (get_label_data)