Whenever an attribute has the attribute type Object, it is a JSON Object. As JSON Objects behave differently than Arrays there are corresponding filters.

Field type: JSON Filters: contains, contained_by, has_key, has_any_keys, has_keys, isnull

contains

The filters contains and contained_by are explained in the Array section. The same logic applies but on the whole object. Please note that this query is case sensitive.

GET https://api.connectedsensors.com/api/v2.0/devices/?properties__contains={"country":"Colombia"}

//Returns Array 'results' with device containing the property 'Colombia'
{
    "count": 1,
    "next": null,
    "previous": null,
    "results": [
        {
            "properties": {
                "city": "Medellín",
                "country": "Colombia",
            },
            ...
        }
    ]
}

contained_by

Filters for the JSON objects that are completely contained by the object provided in the query.

GET https://api.connectedsensors.com/api/v2.0/devices/?properties__contained_by={"_isDemo": true}

//Returns Array 'results' with matching JSON Objects (and empty JSON objects)
{
    "count": 3,
    "next": null,
    "previous": null,
    "results": [
        {
            "properties": {
                "_isDemo": true
            },
            ...
        },
        {
            "properties": {},
            ...
        },
        {
            "properties": {},
            ...
        }
    ]
}

🚧
Attention
Empty Objects are contained by any superset provided, hence all empty JSON Objects are retrieved as well. To avoid that, please use additionally the has_key or has_keys with the corresponding keys desired.

has_key / has_keys / has_any_keys

Filters for JSON Objects that have the provided key(s). has_key filters for a single key. has_keys filters for a list of keys. A JSON Object has to have all keys to match (AND) has_any_key filters for a list of keys like an overlap. A JSON Object has to match only one key (OR).

//has_key
GET https://api.connectedsensors.com/api/v2.0/devices/?properties__has_key="_isDemo"

//Returns Array 'results' with JSON Object containing key '_isDemo'
{
    "count": 1,
    "next": null,
    "previous": null,
    "results": [
        {
            "properties": {
                "_isDemo": true
            },
            ...
        }
    ]
}

//has_keys      
GET https://api.connectedsensors.com/api/v2.0/devices/?properties__has_keys=["country", "city"]
      
//Returns Array 'results' with JSON Objects containing the keys provided
{
    "count": 2,
    "next": null,
    "previous": null,
    "results": [
        {
            "properties": {
                "city": "Medellín", }
                },
                "country": "Colombia",
            },
            ...
        },
        {
            "properties": {
                "city": "New York",
                "country": "United States"
            },
            ...
        }
    ]
}

//has_any_keys
GET https://api.connectedsensors.com/api/v2.0/devices/?properties__has_any_keys=["country","continent"]

//Returns Array 'results' with all JSON Objects matching at least one key
{
    "count": 2,
    "next": null,
    "previous": null,
    "results": [
        {
            "properties": {
                "city": "Medellín",
                "continent": "South America",
            },
            ...
        },
        {
            "properties": {
                "city": "New York",
                "country": "United States"
            },
            ...
        }
    ]
}

The __isnull filter can be applied to JSON Objects as described in the Boolean section.