Can we add new entry to uci file based on selected options

[Yake]

Intention is to write option "efilter1" and "efilter2" to "1" in the UCI file when "testFlag" is enabled. These options need not be displayed in LuCI web interface.

s:taboption("general", Flag, "testFlag", translate("Ignore Option"))

efilter1 = s:taboption("general",DummyValue, "filter1")
efilter1:depends("testFlag", "0")
efilter1.value= "1"

efilter2 = s:taboption("general",DummyValue, "filter2")
efilter2:depends("testFlag", "0")
efilter2.value= "1"

When this was tried, nothing was written to the UCI config.

[Yake]

Is there a way to get this done or not a valid scenario? Should all data that will be written to the UCI config file must be represented in UI?

[jow]

o = s:taboption("general", Flag, "testFlag", translate("Ignore Option"))
o.write = function(self, section_id, value)
    self.map:set(section_id, "efilter1", "1")
    self.map:set(section_id, "efilter2", "1")
end

o.remove = function(self, section_id)
    self.map:delete(section_id, "efilter1")
    self.map:delete(section_id, "efilter2")
end

[Yake]

Am able to write to the UCI file, but while removing - an error "attempt to call method 'delete' (a nil value)" shows up.

[jow]

May fault, it must be self.map:del(...) not self.map:delete(...)