How to Persist a Custom Go Set Data Type with GORM and MySQL?

Persisting a Custom Set Data Type Using GORM Go

The provided code defines a custom set data type threadUnsafeSet and its accompanying methods. To persist this data type using the GORM library for MySQL, there needs to be an implementation of the Scanner and Driver Valuer interfaces.

Scanner and Driver Valuer Interface Implementation

The Scanner interface is used to scan a database value into a Go value, while the Driver Valuer interface is used to convert a Go value to a database driver value. For the threadUnsafeSet type, this means implementing methods to convert the custom set into a database-compatible format and vice versa.

An example implementation could look like this:

func (data *threadUnsafeSet) Value() (driver.Value, error) {
    return data.ConvertJSONToString(), nil
}

func (data *threadUnsafeSet) Scan(value interface{}) error {
    *data = data.ConvertStringToJson(valueString)
}

In this example, the ConvertJSONToString and ConvertStringToJson methods convert the custom set to and from a JSON string, which can then be stored in a database.

By implementing these interfaces, GORM can now understand how to store and retrieve the threadUnsafeSet type from the database.

Note: You should replace the dummy ConvertJSONToString and ConvertStringToJson method calls with actual implementations that match your specific data type conversion requirements.

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