Insert values in multiple tables. One of the tables has complex primary key.

Question

Hello, I am using Jdeveloper version 11.1.2.3.0
I have a table FORM_TYPE and another table Str. The Str table is used to translate strings from the table name which are read from another program from the database and used to generate forms..
The FORM_TYPE  table has a relation to the STR table via formtype.title_str_id = str.str_id.
The STR table has a primary key that is depending on mf_language and str_id columns. I generated entity for the STR table but can't insert from the application module new values for some reason... It says the record invalidates its own entity..
I am trying to create a table that will be editable and will have the columns Description, Name, Str in English, Str in French etc...
Want to create a Form_Type and in the same time to insert new values for each language... But can't make the inserts of the new STR work..
Also the    FormType.TITLE_STR_ID has many values null already in the database.
SELECT FormType.DESCRIPTION,
       FormType.FORM_TYPE_ID,       
       FormType.NAME,
       FormType.PAPER_REPORT_FORMAT,
       FormType.PAPER_REPORT_NAME,
       FormType.TITLE_STR_ID,
       en.str en_str,
       en.str_id,
       en.object_name en_object_name,
       fr.str,
       fr.str_id,
       fr.object_name,
       du.str,
       du.str_id,
       du.object_name,
       bg.str,
       bg.str_id,
       bg.object_name      
FROM FORM_TYPE FormType,
(select str.str_id, str.mf_language_id, str.str, str.object_name
from mf_language ml,  str
where ml.mf_language_id = str.mf_language_id
and ml.code ='en') en
  , (select str.str_id, str.str, str.object_name
from mf_language ml,  str
where ml.mf_language_id = str.mf_language_id
and ml.code ='fr') fr,
  (select  str.str_id,   str.str, str.object_name
from mf_language ml,  str
where ml.mf_language_id = str.mf_language_id
and ml.code ='du') du,
  (select  str.str_id,  str.str, str.object_name
from mf_language ml,  str
where ml.mf_language_id = str.mf_language_id
and ml.code ='bg') bg
WHERE
formtype.title_str_id = en.str_id and
formtype.title_str_id = fr.str_id and
formtype.title_str_id = du.str_id and
formtype.title_str_id = bg.str_id  

Answer 1

Tried that I made view links and associations but still can't insert in both tables at once... Could be because the tables aren't having relationship between them or because the STR table has a (STR_ID, MF_LANGUAGE_ID) primary key...