How to reference fields of grouped model ID

Hi.
I have two DB Multi Record loaders linked to retrieve data from two tables using a left join.

I need export data in excel using XLS_export action, but I don't know how to reference fields from the second DB Loader.

First DB Multi record loader have this config:
DB Field: Empty (Retrieve all records)
Table ....acciones_comerciales....
Request Param: cf_id (not needed)
Model ID: acc
Fields: Empy (All fields)
Load Data: Yes, Data Load Type=All, Enable Associations=Yes, Join Type=INNER, Join rule: acc.establecimiento_ac=est.nombre_establecimiento, Associated models: est
, and Group Model Data=Yes.

On second DB Multi Record loader I have a similar config, using a Model ID named "est" , and played with "Group data model" and "Associated models" in order to "merge" data in an accesible data structure.

I need export data from both loaders (tables), using xls_export, but this only accepts one ModelID. I use "acc", and all the records and fields are exported except those contained in "est" array.

Debug shows this: (shortened 🙄 )

[event] => submit
    [input_submit_1] => Generar archivo Excel (HTML)
    [1abc5c4968943952bd9f6e12bb5c9808] => 1
    [acc] => Array
        (
            [0] => Array
                (
                    [cf_id] => 9
                    [cf_uid] => f7cb467a50dab907814304ce4b68606b
                    [cf_created] => 2013-06-24 02:01:39
                    [cf_modified] => 0000-00-00 00:00:00
                    [cf_created_by] => 659
                    [cf_modified_by] => 0
                    [cf_ipaddress] => 62.97.109.226
                    [cf_user_id] => 659
                    [establecimiento_ac] => Mesón El Castillo Negro
                    [maquina_ac] => 4356
                    [diacierre_ac_i] => 
                    [personasformadas_ac_i] => 
                    [totalformados_ac_i] => 
                    [dificultadesinst_ac_i] => 
                    [nosabecambio_ac_c] => 
                    [incidenciasnoreportadas_ac_c] => 
                    [est] => Array
                        (
                            [0] => Array
                                (
                                    [cf_id] => 1
                                    [cf_uid] => e607a4f214c1a7306c18653e861e08db
                                    [cf_created] => 2013-06-16 05:55:39
                                    [cf_modified] => 2013-06-20 05:44:42
                                    [cf_created_by] => 627
                                    [cf_modified_by] => 627
                                    [cf_ipaddress] => 87.216.119.88
                                    [cf_user_id] => 627
                                    [tipo_establecimiento] => Bar
                                    [nombre_establecimiento] => Mesón El Castillo Negro
                                    [direccion_establecimiento] => C/ Sepúlveda, 7
                                    [poblacion_establecimiento] => Madrid
                                    [provincia_establecimiento] => Madrid
                                    [cp_establecimiento] => 28080
                                    [contacto_establecimiento] => Pepe Pérez
                                )
                        )
                )
etc...

How can I put the field name in xls_export field list for both structures of data? I have tested several ways, without luck.

xls_export config:
Data path: acc
Field list:
establecimiento_ac,maquina_ac,poblacion_establecimiento

establecimiento_ac and maquina_ac (from acc) both works ok.
poblacion_establecimiento are in est, so returns empty.

The query, executed in phpmyadmin for example, works like a charm, with all the info.

¿Can somebody help me?
thanks

Hi neuronageek,

I've just replied to this in another thread.

Bob