AddBlob

Add a user-defined blob object, and properties associated with the new object. A "blob" is a binary array that is treated as generic object file in ApertureDB.

A binary blob must be provided in the array of blobs or you can provide a url where the blob is.

Parameters

• [optional] _ref: reference to be used within the transaction.
• [optional] url: Provide a valid URL instead of passing a blob.
• [optional] properties
• [optional] if_not_found
• [optional] connect

Details

properties are key-value pairs associated with the entity. Check properties for more details.

if_not_found can be used to turn this command into "conditional add". Check if_not_found for more details.

connect can be used to create a connection between the added object and other object(s). Check connect for more details.

Instead of passing a blob to this command, if you would like to add a blob without moving it away from a remote storage location such as a cloud bucket that it currently is present in, you can specify a valid URL to that blob.

An object pointed to by the url can be modified outside of the scope of the server. It might also be subject to a retention policy as determined by the storage target policies. When accessing this object through a Find* command, appropriate error will be returned if the object is no longer accessible.

Examples

Add a "Blob" representing an audio file using AddBlob command:

    [{
        "AddBlob": {
            "properties": {
                "type": "audio",
                "sample_f_Hz": 44000,
                "year": 2021
            }
        }
    }]

A blob must be passed together with the JSON Query.

Successful response:

    [{
        "AddBlob": {
            "status": 0
        }
    }]

Conditionally add a "blob" if the id is not already registered:

    [{
        "AddBlob": {
            "if_not_found": {
                "id": ["==", 44]
            },
            "properties": {
                "type": "audio",
                "sample_f_Hz": 44000,
                "id": 44
            }
        }
    }]

A blob must be passed together with the JSON Query.

Successful response:

    [{
        "AddBlob": {
            "status": 0
        }
    }]

Conditionally add a "blob" if the id is not already present, add a "Recording" event, and create a connection between the "Blob" and the "Recording":

    [{
        "AddEntity": {
            "_ref": 1,
            "class": "Recording",
            "properties": {
                "start": {
                    "_date": "Mon Aug 7 10:59:24 PDT 2017"
                },
                "end": {
                    "_date": "Mon Aug 7 12:59:24 PDT 2017"
                }
            }
        }
    }, {
        "AddBlob": {
            "if_not_found": {
                "id": ["==", 4444]
            },
            "properties": {
                "type": "audio",
                "sample_f_Hz": 44000,
                "id": 4444
            },
            "connect": {
                "ref": 1,
                "class": "taken_in_session"
            },
            "url": "s3://aperturedata-public/blobs/trial.txt"
        }
    }]

Successful response:

    [{
        "AddEntity": {
            "status": 0
        }
    }, {
        "AddBlob": {
            "status": 0
        }
    }]