I'm using sonata admin bundle and want to save multiple records against one entity. for example; I have three fields in my Entity (id, project, issues). suppose that a project has number of issues, I'm using multiple selection for the issues field, issues has ManyToOne relation with Issue entity, project has ManyToOne relation with Project entity, i expecting prject_issues table something like this after save,
id | project| issues
--------------------
1 | 2 | 23
2 | 2 | 78
3 | 2 | 45
4 | 2 | 64
I'm very new to sonata admin and symfony2, how could I achieve this?