I have the following models:

• Category
• Lookbook
• Item

With these relationships:

• Category hasMany Lookbooks
• Lookbook belongsTo Category
• Lookbook belongsToMany Items
• Items belongsToMany Lookbooks

I'm able to access these relationships in the backend forms via the relation behaviour controller modifier, so I can see the list of lookbooks for a category and I can see the list of items for a lookbook. If I click on an item from a lookbook, I can edit it in the relation manager popup but if I click on a lookbook from a category I get an error in the relation manager popup. The popup displays the raw HTML for the popup followed by the message "Relation behaviour does not contain a definition for 'items'."

It seems that the problem for categories is caused by the nested item relation in the lookbook.

Is it possible to access a relation via the relation manager for a relation that has it's own relations, i.e. a nested relation? (Hope that makes sense)

I think in your case "Lookbook" hasMany "Items" instead of "Lookbook" belongsToMany "Items".

When struggling with relations I like to review the code in the Test plugin.

See: https://github.com/daftspunk/oc-test-plugin

It has contains examples of relations and the form options you can use.

Thanks KurtJensen, the examples in the test plugin are really useful. However I can't see any relationship in the source code for the countries test which shows a "Has many through relationship". I'm not sure if this is the type of relationship I need to create.

I tried your suggestion of using a hasMany relationship between Lookbooks and Items but I still get the same problem.

Just to reiterate the problem I'm having, here's how I've setup the relationships between my models.

• A Category can have many Lookbooks and each Lookbook belongs to one Category (a one-to-many relationship).
• A Lookbook can have many Items and an Item can belong to many Lookbooks (a many-to-many relationship using an items_lookbooks joining table).

In the backend I have a sidemenu item for categories and lookbooks. Using the relation manager I can:

• Render a list of Lookbooks for a selected Category in the categories form.
• Render a list of Items for a selected Lookbook in the lookbooks form.

The problem I'm having is with the rendered list of Lookbooks for a Category. Although I can see the list of Lookbooks, when I select a Lookbook or try to create a new Lookbook via the 'Create lookbook' button, the relation popup contains the raw HTML for the popup form, with a message at the end saying "Relation behaviour does not contain a definition for 'items'."

The problem only occurs when I try to create/update a Lookbook via the categories form. I have no problems creating/updating Lookbooks via the lookbooks form and have no problem creating /updating Items via the lookbooks form.

If anyone could help me out with this, it would be much appreciated.

Last updated 10 years ago

hello damianlewis, did you came up with a solution to this issue ? Kind regards