简单键值组表的学说实体设计

Question

I have a data table like this:

id|name|group

That hold simple hierarchical data, for list reference. For exemple I can have on this table a list of countries or cities or a list of product types.

and in a product table with that structure:

id|name|city|country|type

and in each column (city|country|type) an ID (key) of the row in the data table.

I am starting using Symfony2 and I don't know how to represent this kind of data in Doctrine Entity. I dont want to have an entity for each group of data in the data table...

Thank you

Answer 1

You could achive just what you want but you need to write an entity .

1. Write an entity class
2. Create custom EntityRepository (maybe, if you'd like to separate queries from controller)

3. Query the database with query like this:

    $em = $this->getDoctrine()->getManager(); $em->createQuery('SELECT e FROM MyNamespace:Entity e INDEX BY e.key') ->getArrayResult();` // INDEX keyword is crucial here 

4. You get the key => value structure as an output.

I know, it a bit overkill...

UPDATE

Ok, I scratched a bit of code just to show you an example: http://codepad.org/f2pzjnrd