Doctrine2: after flush related etnity has null instead of foreign key

Doctrine2: after flush related etnity has null instead of foreign key

References

Reference NO 1

http://stackoverflow.com/questions/13654922/doctrine2-after-flush-related-etnity-has-null-instead-of-foreign-key

Reference NO 2

http://stackoverflow.com/questions/5332224/doctrine2-onetomany-relationship-inserts-null-as-the-foreign-key

Reference NO 3

http://docs.doctrine-project.org/en/latest/reference/working-with-associations.html

Reference NO 4

http://docs.doctrine-project.org/en/latest/tutorials/getting-started.html

Reference NO 5

http://www.krueckeberg.org/notes/d2.html

Reference NO 6

http://forumarray.com/doctrine-1-to-many-relationship-with-multiple-foreign-keys-377972

Reference NO 7

http://ihaveabackup.net/2012/02/27/what-is-doctrine2-anyway/

Reference NO 8

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