For some reason my many-to-many mapping is not working from both sides. Here is the outline of my setup -

I have the following database tables -
1. accounts with acc_id as primary key
2. custom_field_list with cf_id as primary key
3. custom_field_mapping with cf_id_map and acc_id_map as primary key

Java classes:-

1. Account with a getCustomFields() method
2. CustomField with a getAccounts() method

Here are the Hibernate mappings for the 2 classes -

<hibernate-mapping>
<class
name="Account"
table="accounts">

<id name="id" column="acc_id">
<generator class="native"/>
</id>

<set name="customFields" table="CUSTOM_FIELD_MAPPING" cascade="all">
<key column="acc_id_map" />
<many-to-many column="cf_id_map" class="CustomField" />
</set>
</class>
</hibernate-mapping>



<hibernate-mapping>
<class
name="CustomField"
table="CUSTOM_FIELD_LIST">

<id name="id" column="CF_ID">
<generator class="native"/>
</id>


<set name="accounts" table="CUSTOM_FIELD_MAPPING" cascade="all">
<key column="cf_id_map" />
<many-to-many column="acc_id_map" class="Account"/>
</set>


</class>
</hibernate-mapping>

Data is getting setup correctly in the db.

The issue that I am facing that when I access the customFields from Account instance by using the the following code -
List accs = session.createQuery("FROM Account").list();

things work i.e the getCustomFields() method on the Account class returns the list of custom field objects.

However when I access the accounts from the CustomField instance by using the following code -

List customFields = session.createQuery("FROM CustomField").list();

things do not work i.e the getAccounts() method on the CustomField class does not return the list of account objects.

In other words, the many-to-many mapping is working from one side.
Let me know if I have setup anything incorrectly.