How to create mongoengine filter query from fields listed as string rather DocumentFields

Question

I am trying to write a function which can take all filter query as string and later I want to parse it and create respective filter query used in mongoengine. I tried using Q() but all this is not working with string.

Working:

return Q(Id__istartswith=value)

Not working:

_query = 'Id__istartswith=' + value
return Q(_query)

Any help is highly appreciated.

Answer 1

You can use keyword expansion.

_query = {'Id__istartswith': value}
return Q(**_query)