Okay. I got it working, kind of It only renders one user per user group. Here are my configs:
user_groups (parent migxdb)
{
"formtabs":[
{
"MIGX_id":15,
"caption":"Users",
"print_before_tabs":"0",
"fields":[
{
"MIGX_id":41,
"field":"users_grid",
"caption":"",
"description":"",
"description_is_code":"0",
"inputTV":"",
"inputTVtype":"migxdb",
"validation":"",
"configs":"users",
"restrictive_condition":"",
"display":"",
"sourceFrom":"config",
"sources":"",
"inputOptionValues":"",
"default":"",
"useDefaultIfEmpty":"0",
"pos":1
}
],
"pos":1
}
],
"contextmenus":"update",
"actionbuttons":"",
"columnbuttons":"",
"filters":"",
"extended":{
"migx_add":"",
"disable_add_item":"",
"add_items_directly":"",
"formcaption":"",
"update_win_title":"",
"win_id":"",
"maxRecords":"user_groups",
"addNewItemAt":"bottom",
"media_source_id":"",
"multiple_formtabs":"",
"multiple_formtabs_label":"",
"multiple_formtabs_field":"",
"multiple_formtabs_optionstext":"",
"multiple_formtabs_optionsvalue":"",
"actionbuttonsperrow":4,
"winbuttonslist":"",
"extrahandlers":"",
"filtersperrow":4,
"packageName":"",
"classname":"modUserGroup",
"task":"",
"getlistsort":"id",
"getlistsortdir":"asc",
"sortconfig":"",
"gridpagesize":"",
"use_custom_prefix":"0",
"prefix":"",
"grid":"",
"gridload_mode":1,
"check_resid":1,
"check_resid_TV":"",
"join_alias":"",
"has_jointable":"yes",
"getlistwhere":"",
"joins":"",
"hooksnippets":"",
"cmpmaincaption":"",
"cmptabcaption":"",
"cmptabdescription":"",
"cmptabcontroller":"",
"winbuttons":"",
"onsubmitsuccess":"",
"submitparams":""
},
"permissions":{
"apiaccess":"",
"view":"",
"list":"",
"save":"",
"create":"",
"remove":"",
"delete":"",
"publish":"",
"unpublish":"",
"viewdeleted":"",
"viewunpublished":""
},
"fieldpermissions":"",
"columns":[
{
"MIGX_id":2,
"dataIndex":"id",
"header":"id"
},
{
"MIGX_id":3,
"dataIndex":"name",
"header":"name"
}
],
"category":""
}
users (the nested migxdb grid)
{
"formtabs":"",
"contextmenus":"",
"actionbuttons":"",
"columnbuttons":"",
"filters":"",
"extended":{
"migx_add":"",
"disable_add_item":"",
"add_items_directly":"",
"formcaption":"",
"update_win_title":"",
"win_id":"users",
"maxRecords":"",
"addNewItemAt":"bottom",
"media_source_id":"",
"multiple_formtabs":"",
"multiple_formtabs_label":"",
"multiple_formtabs_field":"",
"multiple_formtabs_optionstext":"",
"multiple_formtabs_optionsvalue":"",
"actionbuttonsperrow":4,
"winbuttonslist":"",
"extrahandlers":"",
"filtersperrow":4,
"packageName":"",
"classname":"modUser",
"task":"",
"getlistsort":"",
"getlistsortdir":"",
"sortconfig":"",
"gridpagesize":"",
"use_custom_prefix":"0",
"prefix":"",
"grid":"",
"gridload_mode":2,
"check_resid":1,
"check_resid_TV":"",
"join_alias":"UserGroupMembers",
"has_jointable":"yes",
"getlistwhere":"",
"joins":"",
"hooksnippets":"",
"cmpmaincaption":"",
"cmptabcaption":"",
"cmptabdescription":"",
"cmptabcontroller":"",
"winbuttons":"",
"onsubmitsuccess":"",
"submitparams":""
},
"permissions":{
"apiaccess":"",
"view":"",
"list":"",
"save":"",
"create":"",
"remove":"",
"delete":"",
"publish":"",
"unpublish":"",
"viewdeleted":"",
"viewunpublished":""
},
"fieldpermissions":"",
"columns":[
{
"MIGX_id":2,
"dataIndex":"id",
"header":"id"
},
{
"MIGX_id":3,
"dataIndex":"username",
"header":"username"
}
],
"category":""
}