Libraries v5.0.0
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    Function applyDiff

    • Execute a MigrationDiff directly against a live database without writing a migration file. Intended for db push (dev-only schema sync).

      Foreign-key constraint drops are executed as raw ALTER TABLE … DROP CONSTRAINT statements before the main alterTable call. Default changes preserve the column's type, nullability and stored data.

      Parameters

      • knex: Knex

        A configured Knex instance or transaction.

      • diff: MigrationDiff

        The diff from diffSchema.

      • tableName: string

        The table to alter.

      Returns Promise<void>

      const dbState = await introspectDatabase(knex, 'users');
      const diff = diffSchema(UserSchema, dbState);
      if (!isDiffEmpty(diff)) await applyDiff(knex, diff, 'users');

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