UpdateBlob

Updates existing blob objects that satisfy the specified constraints.

Parameters

[optional] ref: Reference to other entities within the transaction.
[optional] constraints
[optional] properties
[optional] remove_props

Details

If the ref parameter is used, constraints will be ignored.

If the ref parameter is specified, it must refer to the search result of a previous FindBlob.

For more complex searches for object to delete, a Find command must be used first within the transaction.

Examples

Find the blobs with the “year_captured” property equal to 2007, and remove the “audio_codec” property:

[ {
    "UpdateBlob": {
        "constraints": {
            "year_captured": [ "==", 2007 ],
        },
        "remove_props": [ "audio_codec" ]
    }
}]

Find the blobs that are connected to an object of the class “Dataset”, and update the “year” property:

[ {
    "FindEntity": {
        "_ref":  1,
        "with_class": "Dataset",
        "unique": true,
        "constraints": {
            "name": ["==", "Audio Dataset"]
        }
    }
}, {
    "FindBlob": {
        "_ref": 2,
        "is_connected_to": {
            "ref": 1,
            "connection_class": "in_dataset"
        },
        "blobs": false
    }
}, {
    "UpdateBlob": {
        "ref": 2,
        "properties": {
            "year": 2005,
        }
    }
}]