signal-desktop/js/modules/migrations/get_placeholder_migrations.js

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const Migrations0DatabaseWithAttachmentData =
require('./migrations_0_database_with_attachment_data');
const Migrations1DatabaseWithoutAttachmentData =
require('./migrations_1_database_without_attachment_data');
exports.getPlaceholderMigrations = () => {
const last0MigrationVersion =
Migrations0DatabaseWithAttachmentData.getLatestVersion();
const last1MigrationVersion =
Migrations1DatabaseWithoutAttachmentData.getLatestVersion();
const lastMigrationVersion = last1MigrationVersion || last0MigrationVersion;
return [{
version: lastMigrationVersion,
migrate() {
throw new Error('Unexpected invocation of placeholder migration!' +
'\n\nMigrations must explicitly be run upon application startup instead' +
' of implicitly via Backbone IndexedDB adapter at any time.');
},
}];
};