fix(mrf): individual response page

[justynoh]

Problem

The individual response page for MRF hides some questions if they are unfilled and shows others. This PR fixes this.

Closes FRM-1593

Solution

The reason for this is due to schema differences between fields. Some fields have schema answer: { value: string } while some only have answer: string (this is required for special fields allowing multiple value types, such as radio, checkbox and table). Those with schema answer: string were filtered on save so that those with !answer were filtered out, which matches undefined and '' values. Therefore, on decryption, we 'backfill' the value as '' instead of ignoring the question.

Breaking Changes

• No - this PR is backwards compatible

[linear]

FRM-1593 Fix individual response page display for unfilled fields

[KenLSM]

Thanks @justynoh for the quick turnaround!

I would like to clarify that the subsequent submissions by the next respondent will not be affected by this "prefill" as this is admin-side?

i.e.,

• 1st respondent fills in fields A, and C, and submits.
• 2nd respondent fills in field D and submits, field B will still be empty instead of '' in the DB

[justynoh]

yessu correct! Because this is purely on the rendering side on the individual response page, so nothing on the respondent side is affected