Repeatable fields in a Form cannot be repeated if using a non-manual data provider

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X EE
• Fix Version/s: 7.0.0 DXP FP28, 7.0.X EE, 7.0.4 CE GA5
• Component/s: Dynamic Data Lists > Form
• Labels:
  • liferay-digital-enterprise-70-sp5
  • liferay-fixpack-de-28-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/1890

If viewing a Form in the Forms portlet with a repeatable (select) field that uses a URL data source, then the button to repeat will be missing. The button will render but will be de-rendered almost immediately.

Steps to reproduce:

1. Navigate to Content -> Forms
2. Click the dots in the upper-right corner, click "Data Providers," and add a new Data Provider
3. Fill in the necessary fields:
   1. Add a name
   2. Input "http://localhost:8080/api/jsonws/country/get-countries" in the URL field
   3. Input "name" for both the "Displayed JSON Attribute" and "Stored JSON Attribute" fields
   4. Fill in the "User Name" and "Password" fields with the Test user's credentials
4. Save the new Data Provider
5. Back in Forms admin, add a new Form
6. Add a "Select from List" field
7. Select "From Data Provider," and then select the newly added data provider
8. Under "Show More Options," make the field repeatable
9. Finish editing the Form and save
10. Add a Forms portlet to a page and select the new Form
    Expected result: the Form loads and the select field can be repeated with a plus ('+') button
    Actual result: the Form loads, but the button to repeat the select field is missing

Reproduced in ee-7.0.x: c8a4e0f0bfefb28d0093eacd813b0384fadf3357