This project seeks to provide a true compound field solution for Drupal 7. As much as I love Field collection, it still has to save actual entities, and can cause performance problems due to having to load all the referenced field collection entities on node, or parent entity load.

View the demo preview on YouTube

Limitations

The sub-fields inside the multifield are limited to one value. You can have a multiple value multifield, but the individual fields in in the multifield can only have one value.
You cannot have a multifield inside another multifield.
I've tried to test this with all the core field types, but more advanced fields may cause issues. I haven't run into any yet, but just be aware and test what you want to use.
I will be the first to admit, this solution is doing all kinds of unholy things to Drupal's field and entity APIs, so there may be unexpected dragons laying around that I haven't discovered.

Known issues

Does not yet support the sub-fields in Views API and Entity API
- #2041533: Add Views API integration for the multifield field type
- #2041531: Add entity property API integration for multifields
#2217045: Private files always result in access denied

Recommended Modules

Multiple Value Widget: Improves the UI for managing complex multiple-value field widgets by using jQuery UI tabs.

Comparison to similar modules

Related links

http://drupal.org/project/combofield and https://github.com/yched/combo
#939836: combofield / fieldentity / field-collection / embeddables
http://drupal.org/project/flexifield
Comparison of multifield modules
#494100: State of the multigroup module
http://drupal.org/project/subform
http://drupal.org/project/composed_field
http://drupal.org/project/double_field
http://drupal.org/project/field_group_multiple
http://drupal.org/project/form_builder

Multifield

Issues

Removing Multifield followed by 'add another item' adds back the removed itemRTBCUser interface Created over 8 years ago

Removing Multifield followed by 'add another item' adds back the removed item
RTBC
User interface
Created over 8 years ago