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source/_posts/create-multigroups-drupal-7-using-field-collections.md

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+---
+title: Create Multigroups in Drupal 7 using Field Collections
+date: 2011-08-28
+excerpt:
+  How to replicate CCK’s multigroups in Drupal 7 using the Field Collections
+  module.
+tags:
+  - drupal-7
+  - drupal-planet
+  - cck
+  - fields
+  - field-collection
+  - entity-api
+  - multigroup
+---
+
+One of my favourite things lately in Drupal 6 has been CCK 3, and more
+specifically, the Content Multigroups sub-module. Basically this allows you to
+create a fieldset of various CCK fields, and then repeat that multiple times.
+For example, I use it on this site whist creating invoices for clients. I have a
+fieldset called 'Line Item', containing 'Description', 'Quantity' and 'Price'
+fields. With a standard fieldset, I could only have one instance of each field -
+however, using a multigroup, I can create multiple groups of line items which I
+then use within the invoice.
+
+But at the time of writing this, there is no CCK 3 version for Drupal 7. So, I
+created the same thing using
+[Field Collection](http://drupal.org/project/field_collection) and
+[Entity](http://drupal.org/project/entity) modules.
+
+With the modules uploaded and enabled, go to admin/structure/field-collections
+and create a field collection.
+
+With the module enabled, you can go to your content type and add a Field
+Collection field. By default, the only available Widget type is 'Hidden'.
+
+Next, go to admin/structure/field-collections and add some fields to the field
+collection - the same way that you would for a content type. For this collection
+is going to contain two node reference fields - Image and Link.
+
+With the Field Collection created, I can now add it as a field within my content
+type.
+
+Whilst this works perfectly, the field collection is not editable from the node
+edit form. You need to load the node, and the collection is displayed here with
+add, edit, and delete buttons. This wasn't an ideal solution, and I wanted to be
+able to edit the fields within the collection from the node edit form - the same
+way as I can using multigroups in Drupal 6.
+
+After some searching I found
+[a link to a patch](http://drupal.org/node/977890#comment-4184524) which when
+applied adds a 'subform' widget type to the field collection field and allows
+for it to be embedded into, and editable from within the node form. Going back
+to the content type fields page, and clicking on 'Hidden' (the name of the
+current widget), I can change it to subform and save my changes.
+
+With this change applied, when I go back to add or edit a node within this
+content type, my field collection will be easily editable directly within the
+form.