Hi friends, tried migrating to DataStore from SharedPreferences but `createDataStore` method not fou...

# compose

[Law Gimenez]

Hi friends, tried migrating to DataStore from SharedPreferences but createDataStore method not found. I already added the library on Gradle. I’m following Google’s documentation by the way

[patrick]

Not sure which version you are using, but there's something about this in the Release Notes of DataStore for the `alpha07`: https://developer.android.com/jetpack/androidx/releases/datastore#1.0.0-alpha07

[Law Gimenez]

Thanks I’m checking this one https://android-developers.googleblog.com/2020/09/prefer-storing-data-with-jetpack.html. Do you have any idea how to migrate from SharedPreferences using this latest syntax?

[patrick]

Does this work:

val Context.myDataStore by preferencesDataStore(
    name = "settings",
    produceMigrations = { context ->
        listOf(
            SharedPreferencesMigration(context, "settings")
        )
    }
)

?

[Law Gimenez]

@patrick no it doesn’t work I’m sorry

[patrick]

In your context it could look somewhat like this:

val Context.myDataStore by preferencesDataStore(
    name = "filename",
    produceMigrations = { context ->
        listOf(
            SharedPreferencesMigration(context, "settings")
        )
    }
)

object OnlineJobPreferences{

    fun save(context: Context, jobPreferences: String){
        val dataStore = context.myDataStore
        dataStore.updateData { ... }
    }
}

You can access the datastore anywhere in your codebase by calling myDataStore on a context and the migration should happen automatically

[Law Gimenez]

@patrick thanks your syntax worked already. Does it migrate all the stored values from my old SharedPreferences, or should do it manually?

[patrick]

It should work automatically you just need to use the datastore (reading or writing) as I understood it from the docs

[Law Gimenez]

@patrick appreciate the help. Thank you so much!