Undefined index on doctrine m:n relation

php symfony1 doctrine

I'm having the same trouble, and the answers on StackOverflow while correct dont go deep enough. I found in one of the Doctrine jira issues:

If you run

doctrine:schema:validate

then it will tell you what the problem is.

php symfony1 doctrine

If I am correct...

Your mappedBy in the class Department should be the property of the NewsItem class, in your case departments in stead of newsItems.

php symfony1 doctrine

You are probably missing something in your function notations.. have a look at this:

It seems you are missing @JoinTable notation - maybe try to invert Owning and Inverse side?

CodeHunter