Relationships

Mews POS API supports fetching resource relationships using syntax offered by the JSON:API specification. The resource response contains a relationships key. The value of the relationships key is called a relationships object. Each member of a relationships object represents some form of individual connection or relationship from the resource object in which it has been defined to another specified resource object. Relationships may be to-one or to-many.

A relationship’s name is given by its individual relationship key. The value of this key is a relationship object containing a data key, which is the related resource identifier object. The data object contains the following members:

Property	Type	Contract	Description
id	string	required, max length 36 characters	Universally unique ID (UUID) that identifies the related object.
type	string	required	The type member is used to describe resource objects that share common attributes and relationships.

Mews POS API, as per the JSON:API specification, supports inclusion of related resources (see Relationships above) through the include query parameter.

The include query parameter

The API client can request the inclusion of related resources in the response, using the include query parameter with comma separated values ?include=relatedResourceA,relatedResourceB. For example, a request to the Invoices endpoint with ?include=register,invoiceItems will generate a response that includes the related register and invoice items data for each invoice.

Example request and response

In the example request, we will query the /invoices endpoint with include parameters:

GET [PlatformAddress]/v1/invoices?include=invoiceItems,user,register

Response

{
    "data": [
        {
            "id": "babcf91e-5930-4b90-b929-0fb2b076bd3b",
            "type": "invoices",
            "attributes": {
                "cancelled": false,
                "cancelReason": null,
                "description": null,
                "createdAt": "2018-07-26T07:35:07.817Z",
                "updatedAt": "2018-07-26T07:35:07.836Z",
                "discount": null,
                "tax": "0.00",
                "total": "10.00",
                "subtotal": "10.00",
                "discountAmount": null,
                "itemDiscountAmount": null,
                "tipAmount": null
            },
            "relationships": {
                "user": {
                    "data": {
                        "id": "918a47d1-6553-42ee-8de4-3b5af5edc8e7",
                        "type": "users"
                    }
                },
                "register": {
                    "data": {
                        "id": "f35693cb-cc0c-4c6f-bf16-eb0547444642",
                        "type": "registers"
                    }
                },
                "invoiceItems": {
                    "data": [
                        {
                            "id": "7d87444b-807a-4ea4-8b69-b0e91f5fa174",
                            "type": "invoiceItems"
                        }
                    ]
                }
            }
        }
    ],
    "included": [
        {
            "id": "7d87444b-807a-4ea4-8b69-b0e91f5fa174",
            "type": "invoiceItems",
            "attributes": {
                "productName": "liebe",
                "quantity": "2.0",
                "unitPriceInclTax": "5.00",
                "subtotal": "10.00",
                "tax": "0.00",
                "total": "10.00",
                "discount": null
            },
            "relationships": {
                "product": {
                    "data": {
                        "id": "139a7f7a-591f-4797-ba23-08c9bee0d044",
                        "type": "products"
                    }
                },
                "productVariant": {
                    "data": null
                },
                "invoiceItemModifiers": {
                    "data": []
                }
            }
        },
        {
            "id": "918a47d1-6553-42ee-8de4-3b5af5edc8e7",
            "type": "users",
            "attributes": {
                "name": "John Smith"
            }
        },
        {
            "id": "f35693cb-cc0c-4c6f-bf16-eb0547444642",
            "type": "registers",
            "attributes": {
                "name": "Register #1",
                "invoicesCount": 1325,
                "index": 1,
                "virtual": false,
                "createdAt": "2018-07-12T13:18:04.306Z",
                "updatedAt": "2020-02-04T14:51:20.730Z"
            },
            "relationships": {
                "outlet": {
                    "data": {
                        "id": "65e8856a-8bab-46d2-85e2-2cde89f40f95",
                        "type": "outlets"
                    }
                }
            },
            "links": {
                "self": "[PlatformAddress]/v1/registers/f35693cb-cc0c-4c6f-bf16-eb0547444642"
            }
        }
    ],
    "links": {
        "prev": "[PlatformAddress]/v1/invoices?page[before]=OTMzMw&page[size]=1",
        "next": "[PlatformAddress]/v1/invoices?page[after]=OTMzMw&page[size]=1"
    }
}