Symfony : Converting ManyToMany to OneToMany / ManyToOne and keeping the multiple select in defaul form_row()

creating a ManyToMany relation in a doctrine entity, will result in rendering as a multiple select or checkboxlist, depending on the configuration.

I’m breaking my head over creating this while having the same relationship, but with OneToMany / ManyToOne relations.

Consider Product > ProductColors < Color. In Form type we define the ProductType with productColors as CollectionType, referencing the ProductColorsType. In ProductColorsType we define the EntityType to the entity class Color. This will result in the form_row creating multiple rows, each having a single select with the color options.

Creating a ManyToMany Product – Colors, and setting Color to EntityType, with multiple to true will result in a multiple select.

How can i set this relation in the FormTypes, so the OneToMany / ManyToOne behaves the same as setting a ManyToMany?

Source: Symfony Questions

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