One of the standard examples  of many-to-many Relations is a library. For 
simplicity i choose only 3 Tables:

db.define_table ('author',
    Field ('name', 'string', length=100))

db.define_table ('verb',
   Field ('bnr', db.book ),  
   Field ('anr', db.author ), 
    )

db.define_table ('book',
    Field('title', 'string', length=250))

It is very easy to insert a new book, one or more author and the 
corresponding record
in the table "verb". But i found no way to insert a book with the 
CRUD-Method. The 
complexity<http://dict.leo.org/ende?lp=ende&p=DOKJAA&search=complexity&trestr=0x8001>
is that i first must insert a row into  table "book", then one into table 
"author" and last i have to connect
the inserted rows with the corresponding numbers 'bnr' and 'anr' in table 
"verb". Does anyone know if there
is a way to do that with CRUD?


 

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