[Answer]-Grouping JSON data from DJango QuerySet

You can’t do what you’re looking for within a QuerySet. You’ll need to manipulate your data in python. Here’s one way to do it. It assumes that each element won’t have conflicting keys. Meaning high, medium, low‘s dictionaries will only have the counthigh, etc key in them. Besides brgy_locat of course.

data = {
    "high": [{
        "counthigh": 27,
        "brgy_locat": "Barangay 6"
    }, {
        "counthigh": 3,
        "brgy_locat": "Mabini"
    }],
    "medium": [{
        "brgy_locat": "Barangay 6",
        "countmedium": 31
    }, {
        "brgy_locat": "Tolosa",
        "countmedium": 9
    }],
    "low": [{
        "brgy_locat": "Barangay 12",
        "countlow": 29
    }, {
        "brgy_locat": "Mabini",
        "countlow": 25
    }, {
        "brgy_locat": "Barangay 9",
        "countlow": 35
    }]
}

result = {}

for category in data.values():
    for element in category:
        key = element.pop('brgy_locat')
        if key not in result:
            result[key] = {}
        result[key].update(element)

Then result should be:

{
    "Barangay 6": {
        "counthigh": 27,
        "countmedium": 31
    }, 
    "Mabini": {
        "counthigh": 3,
        "countlow": 25
    },
    "Tolosa": {
        "countmedium": 9
    },
    "Barangay 12":{
        "countlow": 29
    },
    "Barangay 9": {
        "countlow": 35
    }
}