原则：与ID的多对多关系

Question

Is it possible in a Doctrine 2 Many-To-Many relationship to NOT have a composite key from the join tables but rather to have an ID column.

A_B

ID
A_ID
B_ID

Current issue is that it orders the inserted ids by ascending order, but I need them to be in the order that they have been added from the form .

Thanks

Answer 1

Many-to-many relations aren't meant to be ordered. If you want to order something you're introducing extra data to the joining table and it stops being a joining table but a separate entity. So in order to order the relation you'd have to define the "joining entity" and setup many-to-one realations to both tables like that:

Table A            Table AB            Table B
ID                 A_ID                ID
                   B_ID
                   order

with AB table having many-to-one relations to A and B.

Answer 2

yes it is possible

Table A            Table AB           Table B
ID                 ID
                   A_ID                ID
                   B_ID
                   order

in A entity you should define:

/**
* @ORM\ManyToMany(targetEntity="\YourNameSpace\Model\Entities\B",fetch="EXTRA_LAZY")
* @ORM\JoinTable(
*      name="AB",
*      joinColumns={
*          @ORM\JoinColumn(name="B_ID", referencedColumnName="A_ID")
*      },
*      inverseJoinColumns={
*          @ORM\JoinColumn(name="B_ID", referencedColumnName="ID")
*      }
*)
*/
protected $B;

and in B entity:

/**
* @ORM\ManyToOne(targetEntity="\YourNameSpace\Model\Entities\A", inversedBy="AB", fetch="EXTRA_LAZY")
* @ORM\JoinColumns({
*   @ORM\JoinColumn(name="A_ID", referencedColumnName="ID")
* })
*/
protected $A;

but if your main problem is only sorting you can add created field to your table and sort by it.

->orderBy('AB.created', 'DESC')