databaseChangeLog:
  - changeSet:
      id: 009-fk-favorite-user
      author: alexandr krylov
      changes:
        - addForeignKeyConstraint:
            baseTableName: favorites
            baseColumnNames: user_id
            referencedTableName: users
            referencedColumnNames: id
            constraintName: fk_favorites_user

        - addForeignKeyConstraint:
            baseTableName: favorites
            baseColumnNames: post_id
            referencedTableName: posts
            referencedColumnNames: id
            constraintName: fk_favorites_post

        # 🔥 защита от дублей
        - addUniqueConstraint:
            tableName: favorites
            columnNames: user_id, post_id
            constraintName: unique_user_post