Raising with flush draw on 3rd?

[Griff]

Here is the senario. The player to my left posted the bring in bet and all the whole table called. I am last to act and have three diamonds. There are no other diamonds showing. I am obviously going to play my flush draw in this multiway pot. I completed the bet knowing that all 7 of the players would call to build the pot. Is this the correct play. I am new to stud so please excuse the newbie question. Thanks in advance.