Ruby on rails and JSON to create Select form -

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• rails select json array 1 answer

i want create form :

<select>   <option> </select> 

with ruby on rails, countries (and there lot of countries in world haha), don't want write on view, want put json file countries, , theme in option items ( each method maybe )

i don't know have put json file in rails app , how call in view,

does me ?

the easiest location put json file in same directory controllers -- although doing kind of thing repeatedly make mess out of controllers folder.

once you've done can read controller this:

file = file.read('./countries.json') countries = json.parse(file) 

and map countries data type options_for_select expects.

once have working, i'd recommend making helper knows how read json file, cache it's data, , return it. store json file in same directory helper. reference helper in controller.

also note: json gem required this.

in helper, want create method:

def countries_for_select     file = file.read('./countries.json')     countries = json.parse(file)     countries.map {|c| [ c['country']['label'], v['country']['country_code'] ] }) end 

.map translates fields countries json object [[name,key], ...] array options_for_select expects.

per form helper on rails documentation, syntax select_tag looks this

<%= select_tag(:country, options_for_select(...)) %> 

but created helper countries_for_select match format select_tag expecting. need this:

<%= select_tag(:country, countries_for_select) %>