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How to save Many to Many values?

 
Tony Ghy
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Posts: 8
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I've an Applicant class which has a many to many relationship with Category class.

My Objects are as follows:




Now I've a jsp from where I've a model attribute of Applicant class named "applicantAttribute" and "categoryList" is a List<Category> & I'm trying to save the form objects as shown below:



On submitting, my implementation logic is as follows:



It gives me the following error:


I tried to add CascadeType.ALL etc. which resulted in duplicate entries in Category table.

How can I add applicants_categories mapping which is many to many? What am i doing wrong?

Please guide!! I've wasted around 24 hours already trying to solve it. Any help will be really appreciated.
 
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