Enhancement: Interactive Forms - Conditionally show fields based on other fields value

[hasansezertasan]

Let's say that I have a Payment table with polymorphic association. This table can have either these set of values:

Identity Table has columns that are shared across with all the associated tables: id, date_created, date_updated, date_deleted, date_received, direction, amount, method, transaction_id
Credit Card Table has columns that are related to Credit Card payments: brand, authorization_code, last_four_digits, expiration_month, expiration_year, markup
Check Table has columns that are related to Check payments: type, check_number
Other Table has columns that are related to Other types of payments: type

method column in the identity table is the place where we store the type of payment and it can be either CC (Credit Card), CHECK (Check), or OTHER (other).

Some statements can be like this:

• check_number input isn't required when we are adding a credit card or other payment and this shouldn't be included in the interface unless we are adding a check payment.
• type input shouldn't be in the interface unless the payment method is CHECK
• method column shouldn't be in the interface in any case, it's the category of the record that the user selects when creating a new record. It can be a "tab" on the interface and treated as an enum type.

Describe the solution you'd like
I don't have one yet, but I found the question on StackOverflow:
Show fields based on the value of another field in flask admin - Stack Overflow

Additional context
Find more about polymorphic associations: Mapping Class Inheritance Hierarchies — SQLAlchemy 2.0 Documentation

[hasansezertasan]

Related issue that I created at the WTForms repo: pallets-eco/wtforms#825

[hasansezertasan]

Can be easily done with AlpineJS or hyperscript but it's not easy to pass html_params to fields (check out #512).

Overriding the Fields breaks a lot...