copy_metadata_field

The copy_metadata_field processor copies the metadata field value to a destination field for any DataEntity or DataWindow.

Usage

Copy a field value to another field

Example of a job using the copy_metadata_field processor

{
    "name" : "testing",
    "workers" : 1,
    "slicers" : 1,
    "lifecycle" : "once",
    "assets" : [
        "standard"
    ],
    "operations" : [
        {
            "_op": "test-reader"
        },
        {
            "_op": "copy_metadata_field",
            "meta_key": "_key",
            "destination": "myField"
        }
    ]
}

Example of the data and the expected results

const data = [
    DataEntity.make({ name: 'lilly', otherField: 1 }, { _key: 'a1' }),
    DataEntity.make({ name: 'willy', otherField: 2 }, { _key: 'b2' }),
    DataEntity.make({ name: 'billy', otherField: 3 }, { _key: 'c3' }),
    DataEntity.make({ name: 'dilly', otherField: 4 }, { _key: 'd4' }),
]

const results = await processor.run(data);

DataEntity.make({ name: 'lilly', myField: 'a1', otherField: 1 }),
DataEntity.make({ name: 'willy', myField: 'b2', otherField: 2  }),
DataEntity.make({ name: 'billy', myField: 'c3', otherField: 3  }),
DataEntity.make({ name: 'dilly', myField: 'd4', otherField: 4  }),

Parameters

Configuration	Description	Type	Notes
_op	Name of operation, it must reflect the exact name of the file	String	required
meta_key	Name of metadata field to copy the value from	String	required, defaults to "_key"
destination	Name of field to copy the value to	String	required, no default