RethinkDB, add derived columns on result -


i can seem via map+merge 

map( function(row) {    return row.merge( { newcol: 'abc' } ); });

problem if want lookup static map e.g.

var lookup_map = {key1: {text: 'key 1'}};

then below doesn't work

map( function(row) {    return row.merge({ newcol: lookup_map[row('key')].text }); });

row('key'); seems lazily evaluated. idea how this?

you can use sth this:

var lookup_map = {key1: {text: 'key 1'}};  r.db('salaries').table('salaries') .map( function(row) {    return row.merge({ newcol: r.expr(lookup_map)(row('key'))('text') }); });

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