EXTRACTION:
    HOST : localhost
    USER : postgres
    PASSWORD :
    DATABASE : fandom
COMMIT:
    HOST : localhost
    USER :
    PASSWORD :
    DATABASE : fandom
MIGRATION:
    INIT_TABLE: universes
    INIT_KEYS:
        - id as uv_id
        - universe as trax_universe
        - created_at as trax_created_at
    SKELETON :
        - KEY1 = {}
        - KEY2 = {}
    TABLES_ORDER :
        - heroes
        - weapons
    TABLES :
        heroes :
            condition : universe_id = uv_id
                #Dictionary's key ==> Postgres Field of the corresponding schema.table1
            mapping   :
                - KEY1['hero_id'] = %s['hero_id']
                - KEY1['universe_id'] = %s['universe_id']
                - KEY1['name'] = %s['name']
                - KEY1['created_at'] = %s['created_at']
                - KEY1['weapons'] = []
        weapons :
            condition : hero_id = KEY1['hero_id']
            mapping   :
                - list:
                    - KEY1['weapons'].append({})
                    - KEY1['weapons'][-1]['weapon_name'] = %s['weapon_name']
                    - KEY1['weapons'][-1]['weapon_category'] = %s['weapon_category']
    COLLECTIONS :
        heroes : KEY1
        #Collection name <== skeleton