NullPointerException when using Forms evaluate-context API

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.2.X
• Fix Version/s: 7.2.10 DXP FP6, 7.2.X
• Component/s: Dynamic Data Mapping
• Labels:
  • liferay-fixpack-dxp-6-7210
• Branch Version/s:
  7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Sprint: Data_Engine_7.3_24, Data_Engine_7.3_27, Data_Engine_7.3_25, Data_Engine_7.3_26
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/19401

Description
NullPointerException is occurring when the user tries to evaluate the form's context using the Form API.

Steps to Reproduce

1. Go to Content -> Forms
2. Create a new Form
3. Add a field (can be anyone)
4. Save the form
5. Check the ID from your created forms (formId)
6. Make a POST Request to Form API to obtain the context (/o/headless-form/v1.0/forms/{formId}/evaluate-context) 

Expected Result
Returns form context object in JSON format.

Actual Result
Return an error message :

{  "status": "INTERNAL_SERVER_ERROR"}

NullPointerException on the console: 

2020-05-15 17:07:32.132 ERROR [http-nio-8080-exec-10][ExceptionMapper:31] java.lang.NullPointerException2020-05-15 17:07:32.132 ERROR [http-nio-8080-exec-10][ExceptionMapper:31] java.lang.NullPointerExceptionjava.lang.NullPointerException at com.liferay.dynamic.data.mapping.form.renderer.internal.util.DDMFormTemplateContextFactoryUtil.getPathThemeImages(DDMFormTemplateContextFactoryUtil.java:34) at com.liferay.dynamic.data.mapping.form.renderer.internal.DDMFormFieldTemplateContextFactory.setDDMFormFieldTemplateContextPathThemeImages(DDMFormFieldTemplateContextFactory.java:493) at com.liferay.dynamic.data.mapping.form.renderer.internal.DDMFormFieldTemplateContextFactory.setProperties(DDMFormFieldTemplateContextFactory.java:723) at com.liferay.dynamic.data.mapping.form.renderer.internal.DDMFormFieldTemplateContextFactory.createDDMFormFieldTemplateContext(DDMFormFieldTemplateContextFactory.java:154) at com.liferay.dynamic.data.mapping.form.renderer.internal.DDMFormFieldTemplateContextFactory.createDDMFormFieldTemplateContexts(DDMFormFieldTemplateContextFactory.java:201) at com.liferay.dynamic.data.mapping.form.renderer.internal.DDMFormFieldTemplateContextFactory.create(DDMFormFieldTemplateContextFactory.java:74)

 

Reproduced In
7.2.x: 49e1b1cf5d7cf7660fe2081fbba0fd6e4ababb03