Venerable Monks
I want to implement a simple many-to-many relation with Class::DBI. Here is a simplified version of my scheme/objects:

package Hotels;

__PACKAGE__->table('hotels');

__PACKAGE__->columns(Primary => 'hotel_id');
__PACKAGE__->columns(Others => qw{
    name
    city
});

__PACKAGE__->has_many(categories => [HotelCategories => 'category_id']
+);

package Categories;

__PACKAGE__->table('categories');

__PACKAGE__->columns(Primary => 'category_id');
__PACKAGE__->columns(Others => qw{
    name
});

__PACKAGE__->has_many(hotels => [HotelCategories => 'hotel_id']);

package HotelCategories;

__PACKAGE__->table('hotelcategories');

__PACKAGE__->columns(Primary => 'hotelcategory_id');
__PACKAGE__->columns(Others => qw{
    hotel_id
    category_id
);

__PACKAGE__->has_a(hotel_id => Hotels);
__PACKAGE__->has_a(category_id => Categories);
[download]

I want to select all hotels of a particular category in a particular city and the Class::DBI manpage suggests the following construct:

$mycat = Categories->retrieve(3);

for ( $mycat->hotels(city => 'Timbucktoo') ) {
    # do something with hotels in Timbucktoo of category 3
}
[download]

Unfortunately this dies with an Error which in effect says: "city is not a column of HotelCategories". Of course I know this! I believe I am mimicking this specific extract from the Class::DBI manpage:

Limiting

         Music::Artist->has_many(cds => 'Music::CD');
         my @cds = $artist->cds(year => 1980);

When calling the method created by has_many, 
you can also supply any additional key/value 
pairs for restricting the search. The above 
example will only return the CDs with a year 
of 1980.
[download]

Can a kind monk point me to the error I am making? Thank you.

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