Symfony2: Creating optgroups with an Entity type

Last week, I was working on a Symfony2 app where I wanted to generate optgroup tags inside the select box of an Entity form type. After poking around, I ran across a StackOverflow answer explaining how to do it. Basically, it turns out what you have to do is manually return a “choices” array from a class that has access to the Entity Manager. I ended up adding a method to my custom repository and passing that repository into my form:

It’s a bit messy and I’m surprised there isn’t an option on the Entity Type to pass in a callback with access to the Entity Manager to generate a choice list. Looking at the source of DoctrineType it looks like you could potentially create a custom type to extend the Entity type and then access the em from your custom function. Even that though, seems like overkill to accomplish something that is reasonably common.

Posted In: Symfony

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